2026-05-21T20:02:14Zhttp://nukoai.nuk.uni-lj.si:8089/repox/OAIHandler

oai:repox.nuk.uni-lj.si:materiali:02594130-435f-41e4-9743-a2396af8b4fb2020-05-14materiali

info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2009 Dobrovská, Jana Gontarev, Vasilij Kavička, František Sekanina, Buhumil Stetina, Jozef Stransky, Karel http://rightsstatements.org/vocab/InC/1.0/ application/html application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-4EKT9L2W http://www.dlib.si/details/URN:NBN:SI:doc-4EKT9L2W eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Numerical optimization of the method of cooling of a massive casting of ductile cast-iron: Numerična optimizacija postopka hlajenja pri masivnem ulivanju duktilne železove litine: An original application of ANSYS simulating the forming of the temperature field of a massive casting from ductile cast-iron during the application various methods of its cooling using steel chills. The numerical model managed to optimize more than one method of cooling but, in addition to that, provided serious results for the successive model of structural and chemical heterogeneity, and so it also contributes to influencing the as solidified microstructure. The file containing the acquired results from both models, as well as from their organic unification, brings new and, simultaneously, remarkable findings of causal relationships between the structural and chemical heterogeneity and the local solidification time in any point of the casting. Therefore the determined relations enable the prediction of the local density of the spheroids of graphite in dependence on the local solidification time. The calculated temperature field of a two-ton (500x500x 1000) mm casting of ductile cast-iron with various methods of cooling has successfully been compared with temperatures obtained experimentally. This has created a tool for the optimization of the microstructure with an even distribution of the spheroids of graphite in such a way so as to minimize the occurrence of degenerated shapes of graphite, which happens to be one of the conditions for achieving good mechanical properties of castings of ductile cast-iron. Uporaba originalnega programa ANSYS omogoča simulacijo tvorbe temperaturnega polja v masivnem litoželeznem ulitku pri različnih metodah hlajenja z jeklenimi hladilnimi telesi. Z numeričnim modelom se lahko optimira več metod hlajenja, dodatno pa je mogoč izračun pomembnih rezultatov za modeliranje strukturne in kemijske heterogenosti, kar tudi prispeva k vplivu na lito mikrostrukturo. Dobljeni rezultati obeh modelov omogočajo pomembne ugotovitve o odnosih med strukturno in kemijsko heterogenostjo ter lokalnim časom strjevanja v poljubni točki ulitka in napoved lokalne gostote krogličastega grafita v odvisnosti od lokalnega časa strjevanja. Izračunano temperaturno polje dvotonskega ulitka duktilne železove litine z izmerami (500x500x1000) mm je bilo v skladu z eksperimentalnimi rezultati pri različnih metodah hlajenja. Na podlagi teh ugotovitev je bilo izdelano orodje za optimizacijo mikrostrukture z enakomerno porazdelitvijo krogličastega grafita, s čimer se zmanjša pojav degeneriranih oblik grafita in se ustvarijo pogoji za dosego dobrih mehanskih lastnosti ulitkov duktilne železove litine.

oai:repox.nuk.uni-lj.si:materiali:0870e331-d3bf-4d60-b5a3-ca6436fc6fbf2020-05-14materiali

info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2001 Maček, Jadran Marinšek, Marjan http://rightsstatements.org/vocab/InC/1.0/ application/html application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-K93MU8BS http://www.dlib.si/details/URN:NBN:SI:doc-K93MU8BS slv Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Priprava kompozitov Ni-YSZ z uporabo gel-precipitacijske metode: vpliv reakcijskih pogojev na morfološke lastnosti svežih gel-precipitatov ter kemijsko sestavo končnih kompozitov Ni-YSZ: Preparation of Ni-YSZ composites by the gel-precipitation method: morphological characteristics of intermediates and chemical composition of Ni-YSZ composites: Ni-YSZ composite materials were prepared by the gel-precipitation method according to the preliminary results on separate zirconia, yttria and nickel hydroxide reaction systems. The average size of the agglomerate in the suspension diminishes with the increasing final pH value as a consequence of the agglomerate surface stabilization. In contrast, an increase in the initial Ni$^2+$:Zr$^4+$ molar ratio favors smaller agglomerate sizes. Similar behavior was observed in methanol and aqueous media. Methanol has a lower dielectric constant and dipole moment than water, therefore the mutual influence of charged particles in the suspension is greater in the methanol. The highest nickel content in the final composite was obtained when the gel-precipitation was carried out up to a final pH value of 8. Below that value the precipitation of nickel hydroxide is in complete, while above a pH value of 8 the already-precipitated nickel hydroxide dissolves again in the excess of ammonia forming a violet soluble complex. Kompozitne materiale Ni-YSZ smo pripravili po gel-precipitacijski metodi na osnovi preliminarnih poskusov priprave čistih cirkonijevih, itrijevih in nikljevih gelov. Povprečna velikost aglomeratov v suspenziji z višanjem končne pH-vrednosti suspenzije in temperaturo pada kot posledica stabilizacije površine aglomeratov z oddaljevanjem od izoelektrične točke in višanja dinamike polimerizacijskih reakcij. Zviševanje začetnega ionskega razmerja Ni$^2+$:Zr$^4+$ vodi do zmanjševanja velikosti nastalih aglomeratov. Omenjene odvisnosti veljajo tako za vodni kot za metanolni medij, vendar je vpliv med posameznimi nabitimi delci v metanolnem mediju, kot mediju z manjšo dielektrično konstanto in manjšim dipolnim momentom, večji. Maksimalno množino niklja v končnem kompozitu pripravimo iz reakcijske suspenzije s pH vrednostjo 8. Pod to vrednostjo je obarjanje nikljevega hidroksida nepopolno, nad pH 8 pa se nikljev hidroksid v amoniaku raztaplja.

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2011 Hanoglu, Umut Islam, Siraj-ul- Šarler, Božidar http://rightsstatements.org/vocab/InC/1.0/ application/html application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-61WGPYB3 http://www.dlib.si/details/URN:NBN:SI:doc-61WGPYB3 eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Numerical solution of hot shape rolling of steel: Numerična rešitev vročega valjanja jekla:

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2016 Belas, Nadia Bendani, Karim Bouhamou, Nasr-Eddine Mebrouki, Abdelkader Mostefa, Fouzia http://rightsstatements.org/vocab/InC/1.0/ application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-7HR5H0I3 http://www.dlib.si/details/URN:NBN:SI:doc-7HR5H0I3 eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Influence of dredged sediment on the shrinkage behavior of self-compacting concrete: Vpliv izkopanih sedimentov na krčenje samozgoščevalnega betona:

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2016 Gomidželović, Lidija Kostov, Ana Manasijević, Dragan Požega, Emina Živković, Dragana http://rightsstatements.org/vocab/InC/1.0/ application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-IOM59Q0S http://www.dlib.si/details/URN:NBN:SI:doc-IOM59Q0S eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Thermodynamic properties and microstructures of different shape-memory alloys: Termodinamične lastnosti in mikrostruktura različnih zlitin z oblikovnim spominom:

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2010 Klančnik, Grega Kovač, Janez Kovšca, Uroš Praček, Borut Rozman, Janez Zdovc, Miro http://rightsstatements.org/vocab/InC/1.0/ application/html application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-AMXPKJM8 http://www.dlib.si/details/URN:NBN:SI:doc-AMXPKJM8 eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Osseointegration and rejection of a titanium screw: Oseointegracija in zavrnitev titanovega vijaka:

oai:repox.nuk.uni-lj.si:materiali:e0479b86-8dd8-4465-a4f0-23d3cd79c8b52020-05-14materiali

info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2013 Chmiel, Bohuslav Dobrovská, Jana Gryc, Karel Klus, Petr Machovčák, Pavel Michalek, Karel Pachlopnik, Radim Smetana, Bedřich Socha, Ladislav Tkadlečková, Markéta Válek, Ladislav Žaludová, Monika http://rightsstatements.org/vocab/InC/1.0/ application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-A4HPN5ZH http://www.dlib.si/details/URN:NBN:SI:doc-A4HPN5ZH eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Determination of the solidus and liquidus temperatures of the real-steel grades with dynamic thermal-analysis methods: Določanje solidusnih in likvidusnih temperatur realnih jekel z metodami dinamične analize: The knowledge of the solidus and liquidus temperatures of the real-steel grades is one of the most important technological factors - especially when dealing with the processes of casting and solidification. These temperatures are critical parameters for proper settings of the models (physical or numerical) or in the final stage of an applied research of a real process. A correct setting of a production technology is significantly affecting the final quality of the as-cast steel (billets or ingots). Therefore, this paper is devoted to discussing the findings obtained during a utilization of dynamicthermal-analysis methods to identify the solidus and liquidus temperatures applicable to commercially produced steels. The results obtained with a differential thermal analysis (DTA) for three steel grades and with 3D differential scanning calorimetry (3D DSC) for two steel grades are compared with the results of the selected equations commonly used for liquidus and/or solidus temperature calculations. The calculations obtained with the Computherm SW for the discussed steels were also realized. It can be stated that the equilibrium liquidus and solidus temperatures obtained with the above-mentioned methods for each steel grade differ. The differences between the calculated results, the thermodynamic calculations and thermal-analysis results are very unpredictable and vary individually for different steels. These differences are not marginal (tens of Celsius degrees). So, it is sometimes suitable to combine several methods for a proper determination of the liquidus and solidus temperatures for a correct setting of a steel-making process or its modelling. The best solution for a technological process is to obtain the liquidus and solidus temperatures for a concrete-steel grade from agiven steelmaking practice - a thermal analysis of a concrete-steel grade is a possible way. Poznavanje solidusnih in likvidusnih temperatur realnih jekel je med najpomembnejšimi tehnološkimi dejavniki - še posebno pri obravnavi procesov med ulivanjem in strjevanjem. Te temperature so kritični parametri za pravilno postavitev modela (fizikalnega ali numeričnega) ali pri končni stopnji raziskav realnega procesa. Pravilna postavitev proizvodne tehnologije pomembno vpliva na končno kvaliteto ulitega jekla (gredic in ingotov). Zato je ta članek namenjen razpravi o ugotovitvah, dobljenih med uporabo metod dinamične termične analize za ugotavljanje solidusne in likvidusne temperature pri komercialno proizvedenih jeklih. Rezultati, dobljeni z diferenčno termično analizo (DTA) za 3 jekla in s 3D diferenčno vrstično kalorimetrijo (3D DSC) za 2 vrsti jekel, so bili primerjani z rezultati iz izbranih enačb, ki se navadno uporabljajo za izračun temperature solidusa in likvidusa. Za obravnavana jekla so bili tudi izdelani izračuni s Computherm SW. Ugotovljeno je bilo, da se ravnotežne likvidusne in solidusne temperature, dobljene z omenjenimi metodami, razlikujejo. Razlike med izračunanimi rezultati, termodinamičnimi izračuni in rezultati termične analize so nepredvidljivi in se različno spreminjajo pri različnih jeklih. Te razlike niso nepomembne (desetine stopinj Celzija). Zato je včasih pomembno kombinirati več metod za pravilno določitev likvidusne in solidusne temperature pri procesu proizvodnje jekla ali njegovem modeliranju. Najboljša rešitev za tehnološki proces je ugotavljanje likvidusne in solidusne temperature pri konkretnem jeklu iz dane jeklarske prakse - mogoča pot pa je tudi s termično analizo konkretnega jekla.

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2014 Yener, Tuba Zeytin, Sakin http://rightsstatements.org/vocab/InC/1.0/ application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-GCAC9EVG http://www.dlib.si/details/URN:NBN:SI:doc-GCAC9EVG eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Synthesis and characterization of metallic-intermetallic Ti-TiAl3, Nb-Ti-TiAl3 composites produced with electric-current-activated sintering (ECAS): Sinteza in karakterizacija kompozitov kovina-intermetalna zlitina Ti-TiAl3, Nb-Ti-TiAl3, izdelanih s sintranjem, aktiviranim z električnim tokom (ECAS): In this study, we investigated the fabrication of in-situ metallic-intermetallic Ti-TiAl3 and Nb-Ti-TiAl3 composites from a powder mixture containing w = 40 % titanium and w = 60 % aluminum with (w = 5 % and w = 10 %) and without a metallic-niobium addition. Powder mixtures without a binder were compressed uniaxially under a pressure of 130 MPa and sintered at a current of 2000 A for 20 min in a steel mould using the electric-current-activated sintering method. The microstructures of the sintered samples were investigated with light and scanning electron microscopes, the phases in the samples were analyzed with XRD and their hardness was measured with a Vickers hardness tester. Light and scanning electron microscope (EDS) investigations showed that the microstructures of non-reinforced titanium-aluminum samples consisted of two components: the main component was titanium aluminide and the other one was metallic titanium. Also, there was a trace amount of aluminum oxide in the sintered body. XRD analyses also demonstrated that the main phase in the composite is TiAl3. The XRD analyses of the samples reinforced with w = 5 % and w = 10 % of niobium to enhance the ductility of the body showed that metallic niobium and Ti-TiAl3 remained the main phase. In addition, the average hardness values of the samples of the non-reinforced Ti-TiAl3 composite, w = 5 % Nb-reinforced Ti-TiAl3 composite and w = 10 % Nb-reinforced Ti-TiAl3 composite were measured to be about (759, 669 and 600) HV, respectively. V tej študiji je bila preiskovana in situ izdelava kompozitov kovina-intermetalna zlitina Ti-TiAl3 in Nb-Ti-TiAl3 iz mešanice kovinskih prahov z w = 40 % titana, w = 60 % aluminija z dodatkom kovinskega niobija (w = 5 % in w = 10 %) ali brez njega. Mešanica prahov brez veziva je bila enoosno stisnjena pri tlaku 130 MPa in sintrana pri toku 2000 A 20 min v jekleni formi z uporabo metode sintranja, aktiviranega z električnim tokom. Mikrostruktura sintranih vzorcev je bila preiskovana s svetlobno in vrstično elektronsko mikroskopijo, faze so bile analizirane z XRD, njihova trdota pa je bila izmerjena z merilnikom trdote po Vickersu. Svetlobni in vrstični elektronski mikroskop (EDS) sta pokazala, da je mikrostruktura neojačanega titanovega aluminida sestavljena iz dveh komponent: glavna komponenta je bila titanov aluminid, druga pa kovinski titan. V sintrani osnovi so bili tudi sledovi aluminijevega oksida. XRD-analize so pokazale, da je glavna sestavina kompozita TiAl3. XRD-analiza vzorca, ojačanega z w = 5 % in w = 10 % niobija za povečanje duktilnosti osnove, je pokazala, da sta kovinski niobij in Ti-TiAl3 glavni fazi. Izmerjene trdote vzorcev Ti-TiAl3-kompozita brez ojačitve in z w = 5 % Nb ter w = 10 % Nb utrjenega Ti-TiAl3-kompozita so bile (759, 669 in 600) HV.

oai:repox.nuk.uni-lj.si:materiali:6e8f0e61-8512-4db8-b02f-10e8f5e3b29f2020-05-14materiali

info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2006 Motyčka, Petr Němeček, Stanislav http://rightsstatements.org/vocab/InC/1.0/ application/html application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-LFHNTZCI http://www.dlib.si/details/URN:NBN:SI:doc-LFHNTZCI eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Properties and microstructure of very pure CrNiV steel: Lastnosti in mikrostruktura zelo čistih jekel CrNi: The presented experiment is a part of the project aimed to the optimization of melting, casting, forming and heat treatment of high-purity steels with low contents of residual and deoxidation elements. Three ingots of the CrNiV steel with different refining degrees were investigated. Microstructure differences between top and bottom and between central and surface parts of ingot were determined. Changes of the microstructure of the cast steel after forming were described. Physical measurements were performed in order to obtain material parameters for the computer simulation of forming process. The temperature and deformation dependences on strain hardening and specific heat on temperature were measured. Predstavljeni rezultati so del projekta s ciljem optimizacije taljenja, litja in toplotne obdelave zelo čistih jekel z majhno vsebnostjo rezidualnih in dezoksidacijskih elementov. Preiskave so bile izvršene na treh ingotih jekla CrNiV izdelanih z različno stopnjo rafinacije. Določene so bile razlike v mikrostrukturi med glavo in nogo ter srednjim delom ingotov. Opisane so spremembe mikrostrukture jekla po preoblikovanju. Fizikalne meritve so bile izvršene s ciljem, da se pridobijo podatki za računalniško simulacijo procesa preoblikovanja. Določene so bile odvisnosti deformacijskega utrujanja in specifične toplote od temperature.

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2010 Kocijan, Aleksandra http://rightsstatements.org/vocab/InC/1.0/ application/html application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-DRHMNK7U http://www.dlib.si/details/URN:NBN:SI:doc-DRHMNK7U eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article The corrosion behaviour of ferritic stainless steels in alkaline solutions: Korozijsko vedenje feritnih nerjavnih jekel v alkalnih raztopinah: The corrosion resistances of X6Cr17 and X2CrTi17 ferritic stainless steels andcold-rolled, low-carbon steel, as well as circular and transversal welds of X6Cr17 ferritic stainless steel, were investigated in a non-phosphate detergent with a solution pH of 10.5 and at a temperature of 60 °C. The second investigated solution contained the non-phosphate detergent and sodium perborate tetrahydrate at pH 11 and was at a temperature of 90 °C. The potentiodynamic measurements showed that the corrosion resistance decreased from X2CrTi17 and X6Cr17 to the welded specimens and the cold-rolled, low-carbon steel in non-phosphate detergent at the lower temperature. At the elevated temperature and with the addition of sodium perborate tetrahydrate the corrosion stability of all the investigated materials decreased significantly. Preučevali smo korozijsko odpornost vzorcev X6Cr17, X2CrTi17 feritnih nerjavnih jekel, hladno valjanega maloogljičnega jekla in krožnega ter prečnega zvara X6Cr17 feritnega nerjavnega jekla v raztopini nefosfatnega detergenta pri pH 10,5 in temperaturi 60 °C. Druga preiskovana raztopina je vsebovala nefosfatni detergent in natrijev perborat tetrahidrat pri pH 11 in temperaturi 90 °C. Rezultati potenciodinamskih meritev so pokazali, da sta korozijsko najbolj obstojna materiala X2CrTi17 in X6Cr17, manj pa obe vrsti zvarov in hladno valjano maloogljično jeklo. Pri povišani temperaturi in z dodatkom natrijevega perborata tetrahidrata se je korozijska odpornost vseh petih vzorcev izrazito zmanjšala.

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2013 Filetin, Tomislav Landek, Darko Župan, Josip http://rightsstatements.org/vocab/InC/1.0/ application/html application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-92S8YZKC http://www.dlib.si/details/URN:NBN:SI:doc-92S8YZKC eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Investigation of the cooling process with nanofluids according to ISO 9950 and ASTM D 6482 standards: Preiskava postopka ohlajanja v nanotekočini po standarih ISO 9950 in ASTM 6482: Introducing nanofluids as liquid quenchants in order to improve the heat-transfer characteristics is a novel approach in heat treatment. These new liquid quenchants are called nanoquenchants and are colloid suspensions of nanoparticles in the base fluid (BF). For the purpose of this research standard liquid quenchants, such as water and polymer solution, were used as base fluids. Nanoparticles were added to the base fluid in order to increase its thermal properties without a significant effect on the viscosity of the fluid. The added nanoparticles cause an enhancement of the heat-transfer characteristics of the liquid quenchants. In this research TiOsub2 nanoparticles, with the average size of 50 nm, were added to the base fluid. The cooling curves for every tested quenchant were recorded using the IVF SmartQuench system and the quenching process parameters were determined and compared. The tested quenchants were deionised water and polyalkylene-glycol (PAG) water solutions of (5, 10 and 20) % in volume fractions of polymer concentrations. Quenching experiments were first conducted in pure BFs without the addition of nanoparticles and without agitation according to the ISO 9950 standard. The experiments were then repeated with an addition of 0.2 g/l TiOsub2 nanoparticles. The second series of experiments was conducted in a quenching bath with agitation according to the ASTM D 6482 standard. All of the recorded cooling curves were compared and the effects of the nanoparticle addition and agitation were investigated. The addition of the nanoparticles and quenching with agitation caused an increase in the maximum cooling rate and a shorter full-film stage. Uvajanje nanotekočin za kaljenje za izboljšanje lastnosti prenosa toplote je nov način toplotne obdelave. Te nove tekočine za kaljenje se imenujejo nanokalilne tekočine, ki so koloidna suspenzija nanodelcev v osnovni tekočini (BF). Za preiskavo je bila kot standardna tekočina za kaljenje uporabljena mešanica vode in raztopine polimera. Nanodelci so bili dodani osnovni tekočini za povečanje termičnih lastnosti brez velikega učinka na viskoznost tekočine. Dodani nanodelci so povečali toplotno prevodnost tekočine za kaljenje. V tej raziskavi so bili dodani osnovni tekočini nanodelci TiOspodaj2 povprečne velikosti 50 nm. Krivulje ohlajanja za vsako preizkušeno kalilno tekočino so bile posnete s sistemom IVF SmartQuench in procesni parametri kaljenja so bili določeni in primerjani. Preizkušene kalilne tekočine so bile deionizirana voda, vodna raztopina polialkilen glikola (PAG) z volumenskim deležem (5, 10 in 20) % polimera. Preizkusi kaljenja so bili najprej izvršeni v osnovni tekočini (BF) brez dodatka nanodelcev in brez premešavanja, skladno s standardom ISO 9950. Eksperimenti so bili nato ponovljeni z dodatkom nanodelecev 0,2 g/l TiOspodaj2. Druga serija preizkusov je bila izvršena v kalilni kopeli s premešavanjem, kot določa standard ASTM D 6482. Vse posnete krivulje so bile primerjane in preiskovan je bil tudi učinek dodatka nanodelcev in premešavanja. Dodatek nanodelcev in kaljenje s premešavanjem sta povzročila povečanje maksimalne hitrosti hlajenja in krajše stanje popolnega prekritja s paro.

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2014 Anđić, Zoran Kamberović, Željko Korać, Marija Nikolić-Stanojević, Vera Sokić, Miroslav http://rightsstatements.org/vocab/InC/1.0/ application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-IOBXTQED http://www.dlib.si/details/URN:NBN:SI:doc-IOBXTQED eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Synthesis of alpha-Al2O3 based foams with improved properties as catalyst carriers: Sintetizirane pene na osnovi alfa-Al2O3 z izboljšanimi lastnostmi kot nosilke katalizatorja:

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2014 Burja, Jaka Godec, Matjaž Knap, Matjaž Medved, Jože Tehovnik, Franc http://rightsstatements.org/vocab/InC/1.0/ application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-14TF8ION http://www.dlib.si/details/URN:NBN:SI:doc-14TF8ION eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Chromite spinel formation in steelmaking slags: Nastanek kromitnih spinelov v jeklarskih žlindrah:

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2008 Drev, Darko Panjan, Jože Peček, Mitja http://rightsstatements.org/vocab/InC/1.0/ application/html application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-LM6RBTQZ http://www.dlib.si/details/URN:NBN:SI:doc-LM6RBTQZ slv Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Raztapljanje CO2 v embalirani vodi ali brezalkoholni pijači in s tem povezane možne poškodbe: Problems associated with the disolution of CO2 in the case of bottled water and non-alcoholic beverages:

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2013 Bizjak, Milan Janet, Bernarda Klančnik, Grega Koležnik, Mitja Kosec, Ladislav Medved, Jože Nagode, Aleš http://rightsstatements.org/vocab/InC/1.0/ application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-MCVZUI02 http://www.dlib.si/details/URN:NBN:SI:doc-MCVZUI02 eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Effects of solidification parameters on the micro- and macrostructure of the X19CrMoVNbN11-1 steel: Vplivi parametrov strjevanja na makro in mikrostrukturo jekla X19CrMoVNbN11-1:

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2016 Çavuşoglu, Onur Gürün, Hakan Leacock, Alan Gordon http://rightsstatements.org/vocab/InC/1.0/ application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-838VFBOT http://www.dlib.si/details/URN:NBN:SI:doc-838VFBOT eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Forming-limit diagrams and strain-rate-dependent mechanical properties of AA6019-T4 and AA6061-T4 aluminium sheet materials: Mejni diagrami preoblikovanja in odvisnost mehanskih lastnosti od hitrosti preoblikovanja aluminijevih pločevin iz AA6019-T4 in AA6061-T4:

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2015 Gavas, Muammer Kina, Muammer Köklü, Ugur http://rightsstatements.org/vocab/InC/1.0/ application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-J6I49HIN http://www.dlib.si/details/URN:NBN:SI:doc-J6I49HIN eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Effects of various helically angled grinding wheels on the surface roughness and roundness in grinding cylindrical surfaces: Vpliv različnih kotov vijačnice pri brusilnih kolutih na hrapavost površine in okroglost pri brušenju valjastih površin:

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2016 http://rightsstatements.org/vocab/InC/1.0/ application/pdf text/plain application/xml info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-HTMAW5CI http://www.dlib.si/details/URN:NBN:SI:doc-HTMAW5CI slv Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/contributionToPeriodical Materiali in tehnologije:

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2018 Chinnaiyan, Sathiya Narayanan Guruvu, Valarmathi Marimuthu, Kathiresan Ramanathan, Kalimuthu http://rightsstatements.org/vocab/InC/1.0/ application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-A5DSZ5GJ http://www.dlib.si/details/URN:NBN:SI:doc-A5DSZ5GJ eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Optimization of formability of tailor-welded blanks: Optimizacija oblikovanja prilagojenih varjenih surovcev:

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2003 Bernard, Janez Cilenšek, Jena Jenko, Darja Kosec, Marija Malič, Barbara http://rightsstatements.org/vocab/InC/1.0/ application/html application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-I4S4PHK5 http://www.dlib.si/details/URN:NBN:SI:doc-I4S4PHK5 slv Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Sinteza in sintranje keramike KNN 50/50: Synthesis and sintering of KNN 50/50 ceramics:

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2017 Gaberšček, Miran Kapun, Gregor Marinšek, Marjan Merzel, Franci Skalar, Tina Šturm, Sašo http://rightsstatements.org/vocab/InC/1.0/ application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-49KU1SUY http://www.dlib.si/details/URN:NBN:SI:doc-49KU1SUY eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Microstructural evaluation of Ni-SDC cermet from a representative 2D image and /or a 3D reconstruction based on a stack of images: Vrednotenje mikrostruktur Ni-SDC kermeta z 2D in7ali 3D metodo:

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2016 Andronescu, Ecaterina Ban, Cristina-Elisabeta Dinca, Ion Ficai, Anton Pelin, George Stefan, Adriana Truşca, Roxana http://rightsstatements.org/vocab/InC/1.0/ application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-4Q3QZM14 http://www.dlib.si/details/URN:NBN:SI:doc-4Q3QZM14 eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Mechanical properties of polyamide/carbon-fiber-fabric composites: Mehanske lastnosti kompozitne tkanine iz poliamid/ogljikovih vlaken:

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2014 Akkurt, Adnan http://rightsstatements.org/vocab/InC/1.0/ application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-M4BLNDKW http://www.dlib.si/details/URN:NBN:SI:doc-M4BLNDKW eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Experimental investigation of the surface properties obtained by cutting brass-353 (alpha + beta) with an abrasive water jet and other cutting methods: Preiskava lastnosti površine medenine 353 (alfa+beta) po rezanju z abrazijskim vodnim curkom in drugimi metodami rezanja: In the manufacturing industry different methods are used to provide the fastest, cheapest and the most cost-effective way of facilitating the process of cutting with the minimum surface deformation. Apart from the conventional methods, non-traditional methods such as abrasive water jet (AWJ), laser, plasma, underwater plasma and wire erosion are used intensely for the cutting of hard-to-cut materials and products. Research has been conducted on the AWJ method. Brass materials are widely used in industry. In this study the results of the cutting process for brass material with AWJ were investigated. Based on the results the ideal cutting method for the investigated material was found to be AWJ. V industriji se uporabljajo različne metode za hitro, cenejše in stroškovno bolj ugodne metode rezanja z minimalno deformacijo površine. Poleg navadnih metod za rezanje trdih materialov in proizvodov se uporabljajo tudi netradicionalne, kot je abrazijsko rezanje z vodnim curkom (AWJ), laser, plazma, podvodna plazma in žična erozija. Izvršene so bile raziskave AWJ. Medenina se pogosto uporablja v industriji. V tej študiji je bil preiskan postopek rezanja medenine z AWJ. Glede na dobljene rezultate je ugotovljeno, da je za preiskovani material najboljša metoda abrazijsko rezanje z vodnim curkom.

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2013 Bukovec, Peter Dolenec, Matej Kramar, Sabina Mladenovič, Ana Oštir, Danijel Pavšič, Primož http://rightsstatements.org/vocab/InC/1.0/ application/html application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-MOOIA57F http://www.dlib.si/details/URN:NBN:SI:doc-MOOIA57F eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Sewage-sludge stabilization with biomass ash: Stabiliziranje komunalnega mulja s pepelom biomase: By mixing the sewage biodegradable sludge and biomass ash a stable composite is formed. A study showed that, in this way, a building material with a compressive strength of about 2 MPa is produced, which can be used mainly for landfill covers, road-shoulder management, road-base stabilization and rehabilitation of degraded areas. An analysis of the chemical composition of the water eluate from the composite showed that the new composite material is inert and, as such, does not pose a threat and does not burden the environment. From the sustainable-development point of view this kind of waste-residue management presents an optimum - a zero waste solution. Z mešanjem komunalnega biomulja in pepela biomase se tvori stabilen kompozit. Raziskave so pokazale, da tako pridobljen gradbeni material s tlačno trdnostjo okoli 2 MPa lahko uporabimo na območju deponij komunalnih odpadkov za dnevne in končne prekrivke, za ureditev brežin in bankin, pa tudi kot podlago za gradnjo transportnih poti in sanacijo degradiranih območij. Tudi analiza kemične sestave izlužka iz kompozita je pokazala, da je novi kompozit inerten in kot takšen ne obremenjuje okolja. Z vidika trajnostnega razvoja je takšna rešitev optimalna, saj je rezultat predelave uporaben produkt (predelava "zero waste").

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2002 Drglin, Tatjana http://rightsstatements.org/vocab/InC/1.0/ application/html application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-86NZ13DB http://www.dlib.si/details/URN:NBN:SI:doc-86NZ13DB eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article A simultaneous determination of the levels of lead, selenium and tellurium in steel using ICP-AES: Simultano določevanje Pb, Se in Te v jeklu z ICP-AES:

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2016 Huang, Chuan-Ming Kuo, Chil-Chyuan http://rightsstatements.org/vocab/InC/1.0/ application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-EWDK4WZE http://www.dlib.si/details/URN:NBN:SI:doc-EWDK4WZE eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article A high-efficiency automatic de-bubbling system for liquid silicone rubber: Visokozmogljiv sistem za odpravljanje mehurčkov v tekoči silikonski gumi:

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2012 Budak, Igor Eggbeer, Dominic Jevremović, Danimir P. Kojić, Vesna Puškar, Tatjana M. Vukelić, Djordje Williams, Robert J. http://rightsstatements.org/vocab/InC/1.0/ application/html application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-JZDCY4TY http://www.dlib.si/details/URN:NBN:SI:doc-JZDCY4TY eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article An RE/RM approach to the design and manufacture of removable partial dentures with a biocompatibility analysis of the F75 Co-Cr SLM alloy: RE/RM-približek načrtovanje in izdelava snemljivih delov zobovja z analizo biokompatibilnosti zlitine F75 Co-Cr SLM: The implementation of computer-aided technologies and systems has paved the way towards a significant advancement of the conventional modelling and manufacture of dental replacements. In this research the focus is on approach that combines reverse engineering as a modelling technique and rapid manufacture, i.e., selective laser melting, as the manufacturing technology, with special emphases on material selection in the fabrication of removable partial dentures. The paper presents the results of a biocompatibility analysis of the F75 Co-Cr dental alloy using the MTT eluate test. Uporaba računalniških tehnologij in sistemov je odprla pot do pomembnega napredka konvencionalnega modeliranja in izdelave snemljivih zobnih nadomestkov. Težišče te raziskave je približek, ki kombinira obratno inženirstvo kot tehniko modeliranja in hitre izdelave z laserskim taljenjem kot izdelavno tehnologijo s posebnim poudarkom na izbiri materiala za snemljive dele zobovja. V članku so predstavljeni rezultati analize biokompatibilnosti zobne zlitine F75 Co-Cr z MTT-preizkusom eluiranja.

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2010 Donik, Črtomir Jenko, Monika Mandrino, Djordje Paulin, Irena http://rightsstatements.org/vocab/InC/1.0/ application/html application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-K4LVGR4Q http://www.dlib.si/details/URN:NBN:SI:doc-K4LVGR4Q eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article AES and XPS characterization of titanium hydride powder: Preiskave praška titanovega hidrida s spektroskopijo Augerjevih elektronov in rentgensko fotoelektronsko spektroskopijo: Titanium hydride powder, manufactured by ball milling titanium in a hydrogen atmosphere down to micron-sized particles, was analyzed by X-ray Photoelectron Spectroscopy (XPS). A strong titanium oxide signal was also measured, which decreased some what after intense sputtering of the sample, but was impossible to get rid of completely. This was probably due to the high surface/volume ratio of each TiHsubx particle, which contributes to a substantial titanium oxide/TiHsubx ratio, and due to the surface morphology of the powder sample, which leaves a considerable part of the oxide layer shaded during the sputtering. Auger Electron Spectroscopy (AES) was then employed and some characteristic differences in the shape of the Ti LMM spectra between the TiHsubx and Ti were observed; however, they can be ascribed to the TiHsubx only after a comparison with the same types of spectra measured on titanium oxide. An additional XPS measurement was performed with TiHsubx powder and powdered Ti. The peaks were fitted with Ti oxide and metallic Ti components and the shifts of the metallic component between the Ti and TiHsubx (a shift of 0.4 eV was expected) were checked for. Prašek titanovega hidrida, sintetiziran z mletjem titana v krogličnem mlinčku v vodikovi atmosferi do mikrometrske velikosti delcev, smo analizirali z rentgensko fotoelektronsko spektroskopijo (XPS). Pri tem smo izmerili močan signal titanovega oksida, ki je sicer upadel po intenzivnem ionskem jedkanju površine vzorca, ni pa izginil. Verjeten razlog je visoko razmerje površina/volumen posameznih delcev TiHspodajx, ki prispeva k znatnemu razmerju titanov oksid/TiHspodajx, kakor tudi morfologija površine praškastega vzorca zaradi katere je del oksida zasenčen med ionskim jedkanjem. S spektroskopijo Augerjevih elektronov (AES) smo opazili nekatere karakteristične razlike v obliki Ti LMM-spektrov med TiHspodajx in Ti, vendar jih je bilo mogoče pripisati TiHspodajx šele po primerjavi z enakim tipom spektrov, izmerjenih pri titanovem oksidu. Nadaljnjo meritev XPS smo opravili pri prašku Ti. Določili smo oksidne in kovinske komponente vrhov in preverjali premike kovinskih komponent pri TiHspodajx glede na Ti (premika naj bi bil 0,4 eV).

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2001 Grošelj, Neva Lavrenčič Štangar, Urška Orel, Boris Schmitz, Andreas http://rightsstatements.org/vocab/InC/1.0/ application/html application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-E6497QZC http://www.dlib.si/details/URN:NBN:SI:doc-E6497QZC slv Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Protonsko prevodni elektroliti z organsko-anorgansko hibridno stukturo: Proton conducting electrolytes with organic-inorganic hybrid structure:

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2015 Golob, Janvit Kecelj, Janez Ocepek, Martin Venturini, Peter Zabret, Joži http://rightsstatements.org/vocab/InC/1.0/ application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-3LUUQRGN http://www.dlib.si/details/URN:NBN:SI:doc-3LUUQRGN eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Monitoring of polyurethane dispersions after the synthesis: Spremljanje poliuretanskih disperzij po sintezi:

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2015 Boy, Mehmet Ciftci, Ibrahim Gunay, Mustafa Ozhan, Feridun http://rightsstatements.org/vocab/InC/1.0/ application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-3QLGU01U http://www.dlib.si/details/URN:NBN:SI:doc-3QLGU01U eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Application of the Taguchi method to optimize the cutting conditions in hard turning of a ring bore: Uporaba Taguchi-jeve metode za optimizacijo trdega struženja roba izvrtine:

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2016 Ghomi, Meysam Khakian Mirdamadi, Shamsoddin Nategh, Saeid http://rightsstatements.org/vocab/InC/1.0/ application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-DG8CO4MK http://www.dlib.si/details/URN:NBN:SI:doc-DG8CO4MK eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Microstructural evolution during the transient liquid-phase bonding of dissimilar nickel-based superalloys of IN738LC and NIMONIC 75: Razvoj mikrostrukture med spajanjem s prehodno tekočo fazo neenakih superzlitin na osnovi niklja IN738LC in NIMONIC 75:

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2010 Steiner Petrovič, Darja http://rightsstatements.org/vocab/InC/1.0/ application/html application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-LM7PN2PQ http://www.dlib.si/details/URN:NBN:SI:doc-LM7PN2PQ eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Non-oriented electrical steel sheets: Neorientirane elektropločevine: Non-oriented electrical steel sheets are sheets tailored to produce specific properties and are produced from Fe-Si or Fe-Si-Al alloys. Non-oriented electrical steel sheets are incorporated into a wide range of equipment, from the simplest domestic appliances to hybrid and pure electric vehicles. Future efforts will be focused on controlling the residual elements in the steel, optimizing the hot and cold rolling, and optimizing the crystallographic texture development, with the aim to enhance the performance of the finished product. Neorientirano elektropločevino izdelujemo iz silicijevega jekla in iz enakega jekla, ki je legirano z aluminijem. Neorientirano elektropločevino uporabljamo predvsem za magnetna jedra električnih motorjev in transformatorjev, v zadnjem času pa tudi za izdelavo hibridnih in elektroavtomobilov. Lastnosti neorientirane elektropločevine lahko v prihodnje še izboljšamo z zmanjšanjem vsebnosti nečistoč v jeklu, z optimizacijo vročega in hladnega valjanja ter z razvojem ugodne kristalografske teksture. Dobre lastnosti elektropločevin povečujejo energijsko učinkovitost električnih naprav, v katere so vgrajene.

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2017 Černý, Robert Fiala, Lukáš Jerman, Miloš Rovnaník, Pavel http://rightsstatements.org/vocab/InC/1.0/ application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-CLV4ISAV http://www.dlib.si/details/URN:NBN:SI:doc-CLV4ISAV eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Basic physical, mechanical and electrical properties of electrically enhanced alkali-activated aluminosilicates: Osnovne fizikalne, mehanske in električne lastnosti električno izboljšanih, z alkalijami aktiviranih aluminosilikatov:

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2014 Akkurt, Adnan Esme, Ugur Kulekci, Mustafa Kemal Ozkul, Iskender http://rightsstatements.org/vocab/InC/1.0/ application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-8U38QJUD http://www.dlib.si/details/URN:NBN:SI:doc-8U38QJUD eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Multiple regression modeling and prediction of the surface roughness in the WEDM process: Večkratno regresijsko modeliranje in napovedovanje hrapavosti površine pri postopku WEDM: Wire electrical discharge machining (WEDM) process is a specialized thermal machining process capable of accurately cutting and machining mechanical parts with various hardnesses and intricate shapes. WEDM is also a modification of electrical discharge machining (EDM) and it has been widely used for a long time for cutting punches and dies, shaped pockets and other machine parts on conductive work materials. The surface roughness of a machined surface mainly depends on the feed rate, the current and pulse duration in the WEDM machining process. It also depends on the optimum selection of WEDM parameters. The present study focused on the multiple regression modeling and predicting the surface roughness of the Dievar hot-work tool steel during the WEDM process. Mathematical relationships between the surface roughness and WEDM cutting parameters (feed rate, current and pulse on time) have been investigated. The results show that the multiple regression analysis is a successful method for developing a mathematical model to predict the surface roughness. Obdelovanje z žično erozijo (WEDM) je poseben toplotni postopek, ki zagotavlja natančno rezanje in obdelovanje mehanskih delov z različno trdoto in zapleteno obliko. WEDM je modificirana elektroerozija (EDM) in se že dolgo uporablja za rezanje prebijal in orodij, oblikovanih žepov in drugih strojnih delov na prevodnem obdelovancu. Hrapavost površine je predvsem odvisna od hitrosti odvzema, toka in trajanja pulza pri WEDM-procesu obdelave. Odvisna je tudi od optimalne izbire parametrov pri WEDM. Ta študija je osredinjena na večkratno regresijsko modeliranje in napovedovanje hrapavosti površine orodnega jekla za delo v vročem Dievar pri obdelavi z WEDM. Preiskovana je bila matematična odvisnost med hrapavostjo površine in parametri rezanja WEDM (hitrost podajanja, tok in časovni impulzi). Rezultati kažejo, da je večkratna regresijska analiza uspešna metoda za razvoj matematičnega modela za napovedovanje hrapavosti površine.

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2010 Belikov, Sergey Borisevich Chygyryns'kyy, Valeryy Victorovich Mamuzić, Ilija Shevchenko, Vladimir Grigorovich http://rightsstatements.org/vocab/InC/1.0/ application/html application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-4FW098UW http://www.dlib.si/details/URN:NBN:SI:doc-4FW098UW eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article A new solution of the harmonic functions in the theory of elasticity: Nekatere značilnosti harmoničnih funkcij v teoriji o elastičnosti: A new approach to the solution of a plane problem of the theory of elasticity with the use of two harmonic functions with a Cauchy-Riemann analytical link is developed. The analysis of the harmonic functions shows that some allow a new approach to the solution of problems of the theory of elasticity. For the solution of linear differential equations a fundamental substitution is used, written in the general form psi(x,y) = y = Csub{sigma} * exp theta, with theta = theta(x,y) AS A function of the strain centre. The transformations are explaned with the properties of harmonic functions, where the Cauchy-Riemann relations can be used. The considered variants extend the possibilities for solutions and, if necessary, to obtain suitable functions for predetermined tasks. The new method is universal and can be effectively used when the fields of stresses and strains are described with trigonometric expressions. Razvit je bil nov način reševanja ravninskega problema teorije elastičnosti s Cauchy-Riemanovo analitično zvezo. Analiza harmoničnih funkcij pokaže, da nekatere omogočajo nov način za rešitve problemov iz teorije elastičnosti. Za rešitev linearnih diferencialnih enačb se uporablja temeljna substitucija, zapisana v splošni obliki z psi(x,y) = y = Csigma * exp theta, z theta = theta(x,y) kot funkcijo središča deformacije. Transformacije smo razložili z lastnostmi harmoničnih funkcij, pri katerih je dovoljena uporaba Cauchy-Riemanovih povezav. Upoštevane variante razširjajo možnost rešitev in, če je potrebno, omogočijo, da dobimo rešitve za vnaprej načrtovano uporabo. Nova metoda je univerzalna in se lahko učinkovito uporabi, če so polja napetosti in deformacij opisana s trigonometričnimi odvisnostmi.

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2006 Cukalla, Mimoza Huebner, Peter Shehu, Mira http://rightsstatements.org/vocab/InC/1.0/ application/html application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-AOSTKKY0 http://www.dlib.si/details/URN:NBN:SI:doc-AOSTKKY0 eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article The behavior of fatigue-crack growth in shipbuilding steel using the ESACRACK approach: Crack growth-rate calculations with NASGRO 3.0 using a relationship called the ESACRACK approach were developed by Forman and Newman at NASA. A simple assessment of the crack-growth analysis is given by the Paris law, called the analytic approach; however, for a complex case this assessment is conservative. In this paper we introduced and analyze the crack-growth curve for welded shipbuilding steel using the ESACRACK approach by identifying the crack-opening function, f, the threshold stress-intensity factor, triangleKsub(th), and the critical stress-intensity factor, KsubC. Izvedli smo izračune hitrosti rasti utrujenostne razpoke z NASGRO 3.0 na osnovi tako imenovanega postopka ESACRACK, ki sta ga razvila Forman in Newman pri NASI. Enostavna ocena rasti utrujenostne razpoke je možna z analitičnim načinom, ki temelji na Parisovem zakonu. Vendar pa je v kompliciranih primerih ocena preveč konzervativna. V tem prispevku smo zato analizirali rast utrujenostne razpoke v konstrukcijskem jeklu, namenjenem za varjenje ladijske pločevine po postopku ESACRACK, ki temelji na funkciji odpiranja razpoke f, mejni vrednosti faktorja intenzitete napetosti trikotnikKspodaj(th) in kritičnem faktorju intenzitete napetosti KspodajC.

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2011 Jurči, Peter http://rightsstatements.org/vocab/InC/1.0/ application/html application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-5CFCSCRB http://www.dlib.si/details/URN:NBN:SI:doc-5CFCSCRB eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Cr-V ledeburitic cold-work tool steels: Ledeburitna jekla Cr-V za delo v hladnem: Cold-work tool steels based on Cr-V alloying belong to the most important toolmaterials for large series manufacturing. To enable high production stability, the tools must withstand various types of degradation processes, concerning firstly plastic deformation and wear. Therefore, the materials should have a high hardness, tensile and/or compressive strength and wear resistance. On the other hand, the materials have to resist brittle fracture, e.g., they must exhibit sufficiently high impact toughness and fracture toughness. This paper deals with an overview of the heat-treatment procedures and surface engineering techniques suitable for Cr-V tool steels. The effect of each of them on the main mechanical properties is also demonstrated and discussed. As a typical example, P/M made from the Cr-V ledeburitic steel Vanadis 6 is presented. Orodna jekla za delo v hladnem legirana s Cr-V spadajo med najbolj pomembne materiale za orodja za delo v velikih serijah. Omogočajo veliko stabilnost proizvodnje in prenašajo različne procese degradacije zaradi plastične deformacije in obrabe. Zato morajo imeti visoko trdoto, raztržno in tlačno trdnost ter obrabno obstojnost. Po drugi strani morajo biti jekla dovolj odporna proti krhkemu lomu, kar pomeni, da morajo imeti tudi visoko udarno žilavost in žilavost loma. Članek je pregled postopkov toplotne obdelave in tehnologije površine, primernih za orodna jekla Cr-V, vpliv vsakega postopka pa je opisan in analiziran. Kot tipičen zgled, je obravnavano P/M ledeburitno jeklo Cr-V Vanadis 6.

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2011 Er, Onur Esme, Ugur Kulekci, Mustafa Kemal http://rightsstatements.org/vocab/InC/1.0/ application/html application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-GZVD68LU http://www.dlib.si/details/URN:NBN:SI:doc-GZVD68LU eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Experimental comparison of resistance spot welding and friction-stir spot welding processes for the EN AW 5005 aluminum alloy: Eksperimentalna primerjava odpornosti procesov točkovnega varjenja in točkovnega tornega varjenja pri aluminijevi zlitini EN AW 5005: Friction-stir spot welding (FSSW) is a solid-state welding process suitable for the spot joining of lightweight low-melting-point materials. The process is performed by plunging a rotating pin that creates a connection between sheets in an overlap configuration by means of frictional heat and mechanical work. In this study the tensile-shear-strength and hardness variations in the weld regions are discussed. The results obtained are compared with those derived from the application of traditional resistance spot welding (RSW). The experimental results of the study show that FSSW can be an efficient alternate process to electrical resistance spot welding. Torno mešano varjenje (FSSW) je proces, ki se odvija v trdnem in je primeren za točkovno spajanje lahkih kovin z nizkim tališčem. Pri tem postopku se z vrtečim se trnom, s toploto trenja in z mehanskim delom ustvari povezava med pločevino in konfiguracijo prekritja. Študija obravnava variacije natezne strižne trdnosti in trdote v območju zvara. Dosežene rezultate smo primerjali s tistimi, ki so bili doseženi s tradicionalnim uporovnim točkovnim varjenjem (RSW). Rezultati preizkusov kažejo, da je lahko FSSW učinkovit alternativen proces za električno točkovno uporovno varjenje.

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2002 Jamar, Nina Južnič, Primož http://rightsstatements.org/vocab/InC/1.0/ application/html application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-7WRY5IN8 http://www.dlib.si/details/URN:NBN:SI:doc-7WRY5IN8 slv Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Čemu revije v slovenščini? Bibliometrijska analiza objav v znanstvenih revijah Materiali in tehnologije (2000) in Materials science and technology (2000): Why journals in slovenian language? Bibliometric analysis of papers in scientific journals Materiali in tehnologije (2000) and Materials science and technology (2000):

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2013 Patil, Hiralal Soman, Sanjay http://rightsstatements.org/vocab/InC/1.0/ application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-I2H7ZWYC http://www.dlib.si/details/URN:NBN:SI:doc-I2H7ZWYC eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Influence of weld-process parameters on the material characterization of the friction-stir-welded joints of the AA6061-T6 aluminium alloy: Vpliv parametrov postopka varjenja na lastnosti torno-vrtilno varjenih spojev aluminijeve zlitine AA6061-T6: Friction-stir welding (FSW), a solid-state innovative joining technique, is being widely used for joining aluminium alloys for the aerospace, marine, automotive industries and many other applications of commercial importance. FSW trials were carried out using a vertical machining centre (VMC) on an AA6061 alloy. The main objective of the present work was to evaluate the weld-processing parameters of FSW for the AA6061-T6 alloy and to determine the properties of the obtained joints with respect to the welding speed. The experiments were conducted by varying the welding speed between 55-70 mm/min and the rotating speed was fixed at 1700 r/min. The tensile properties, microstructure, microhardness, fractography and corrosion resistance of the FSW joints were investigated in this study. The result showed that there was avariation in the grain size in each weld zone depending upon the material and the process parameters of FSW in a joint. The coarsest grain size was observed in the heat-affected zone (HAZ), followed by the thermo-mechanically affected zone (TMAZ) and the nugget zone (NZ). The maximum tensile strength of 184 MPa and the highest joint efficiency of 49.32 % were obtained on the joint fabricated at the welding speed of 55 mm/min. Torno-vrtilno varjenje (FSW) je inovativna tehnika spajanja v trdnem stanju za spajanje aluminijevih zlitin za letalstvo, pomorsko, avtomobilsko industrijo in mnoge druge komercialno pomembne uporabe. FSW-preizkusi so bili izvedeni na vertikalnem obdelovalnem stroju (VMC) z zlitino AA6061. Glavni cilj tega dela je bila ocena varilnih parametrov pri FSW-postopku pri zlitini AA6061-T6 in določitev lastnosti dobljenih spojev glede na hitrost varjenja. Preizkusi so bili izvršeni pri različnih hitrostih varjenja 55-70 mm/min, pri čemer je bila hitrost rotacije stalna pri 1700 r/min. V tej študiji so bile preizkušene natezna trdnost, mikrostruktura, mikrotrdota, fraktografija in korozijska odpornost FSW-spojev. Rezultati so pokazali, da se je v vsaki coni varjenja spreminjala velikost zrn, kar je posledica materiala in procesnih parametrov pri FSW-spoju. Najbolj groba zrna se opazi v toplotno vplivani coni (HAZ), sledi ji termomehansko vplivano področje (TMAZ) in drobnozrnato področje (NZ). Največja natezna trdnost 184 MPa in največja učinkovitost spajanja 49,32 % sta bili doseženi pri spoju s hitrostjo varjenja 55 mm/min.

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2007 Anžel, Ivan Gusel, Leo Kosec, Ladislav Poharc, Mojmir Rudolf, Rebeka http://rightsstatements.org/vocab/InC/1.0/ application/html application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-0I412U3H http://www.dlib.si/details/URN:NBN:SI:doc-0I412U3H slv Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Študij notranje oksidacije v naogljičenih hitrostrjenih trakovih Cu: The study of the internal oxidation in internally carbonised Cu ribbons: In this paper we present a composite with fine dispersion of nano-sized bubbles, which can be formed by internal oxidation of fine dispersed graphite particles. For this purpose the initial pure Cu ribbons were internally carbonised to obtain very fine, some 100 nm-sized graphite particles homogeneously distributed in the Cu matrix. By the internal oxidation process the reaction of dissolved oxygen with graphite yields the gas products (CO, CO2) which cannot be dissolved in the crystal lattice of the metal. The gas products are meshed in the space previously occupied by graphite and they have a greater specific volume than the solid graphite, thus establishing the compressive stresses in the metalic matrix and consequently causing the strengthening offect. On the other hand, such stress fields can react with sliding dislocation, whereby they impede the dislocation motion and consequently we would expect that the composite mechanical properties would be improved.

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2008 Marinšek, Marjan http://rightsstatements.org/vocab/InC/1.0/ application/html application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-AOY2VL4B http://www.dlib.si/details/URN:NBN:SI:doc-AOY2VL4B eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Analysis of the temperature profiles during the combustion synthesis of doped lanthanum gallate: Analiza temperaturnih profilov med zgorevalno sintezo dopiranega lantanovega galata:

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2017 Kazeminezhad, Mohsen Mostafaei, Mohammad Ali http://rightsstatements.org/vocab/InC/1.0/ application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-IZ9WL5S4 http://www.dlib.si/details/URN:NBN:SI:doc-IZ9WL5S4 eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Grain-refining ability of ultra-rapid annealing for low-carbon steel: severe plastic deformation: Sposobnost udrobnenja zrn pri zelo hitrem žarjenju maloogljičnega jekla po veliki plastični deformaciji:

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2003 Gontarev, Vasilij Kosec, Gorazd http://rightsstatements.org/vocab/InC/1.0/ application/html application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-DXC0PGS5 http://www.dlib.si/details/URN:NBN:SI:doc-DXC0PGS5 slv Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Notranja oksidacija dvofazne binarne srebrove zlitine s telurjem: Internal oxidation of two-phase binary silver alloys with tellurium:

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2012 Medved, Jože Mrvar, Primož Volšak, Darja Vončina, Maja http://rightsstatements.org/vocab/InC/1.0/ application/html application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-FS4YCMRV http://www.dlib.si/details/URN:NBN:SI:doc-FS4YCMRV eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Thermodynamic characterization of an AlCu5.5BiSn alloy with various neodymium additions: Termodinamična karakterizacija zlitine AlCu5,5BiSn z različnimi dodatki neodima:

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2017 Czupryński, Artur http://rightsstatements.org/vocab/InC/1.0/ application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-MDG1T32D http://www.dlib.si/details/URN:NBN:SI:doc-MDG1T32D eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Properties of Alsub2Osub3/TiOsub2 and ZrOsub2/CaO flame-sprayed coatings: Lastnosti plamensko nanešenih premazov Alspodaj2Ospodaj3/TiOspodaj2 in ZrOspodaj2/CaO:

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2016 Aksakal, Bünyamin Karaca, Faruk http://rightsstatements.org/vocab/InC/1.0/ application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-4SOK47H5 http://www.dlib.si/details/URN:NBN:SI:doc-4SOK47H5 eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Effect of the TiBN coating on a HSS drill when drilling the MA8M Mg alloy: Vpliv TiBN prevleke na HSS svedru pri vrtanju MA8M Mg zlitine:

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2015 Čegan, Tomáš Juřica, Jan Kursa, Miroslav Malcharcziková, Jitka Michenka, Vít Pohludka, Martin http://rightsstatements.org/vocab/InC/1.0/ application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-LOQJXPRZ http://www.dlib.si/details/URN:NBN:SI:doc-LOQJXPRZ eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Influence of the hip process on the properties of as-cast Ni-based alloys: Vpliv vročega izostatskega stiskanja na lastnosti Ni-zlitin z lito strukturo:

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2017 Laubscher, R. F. Manjaiah, Mallaiah http://rightsstatements.org/vocab/InC/1.0/ application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-7SZO6KQJ http://www.dlib.si/details/URN:NBN:SI:doc-7SZO6KQJ eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article A review of the surface modifications of titanium alloys for biomedical applications: Pregled modifikacij površine titanovih zlitin za biomedicinsko uporabo:

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2012 Godec, Matjaž Jenko, Monika Skobir Balantič, Danijela Anica Vodopivec, Franc Žužek, Borut http://rightsstatements.org/vocab/InC/1.0/ application/html application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-15QWWAVR http://www.dlib.si/details/URN:NBN:SI:doc-15QWWAVR eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Nucleation and growth of Msub{23}Csub6 particles in high-chromium creep-resistant steel: Nukleacija in rast izločkov Mspodaj{23}Cspodaj6 v kromovem jeklu, odpornem proti lezenju: The nucleation of Msub{23}Csub6 particles occurs on the surface of Fesub{3}C particles with a high content of chromium. The initially high content of iron decreases and the chromium increases to about Crsub{18}Fesub{3}Mosub{2}Csub6, in equilibrium with the in ferrite composition. The nucleation and growth of the Msub{23}Csub6 particles depend on the carbide's Gibbs free energy, the content and the diffusion afflux of the carbide-forming elements in solid solution in the ferrite. A simple method is proposed for calculating the average spacing and the average size of the carbide particles in steel with a microstructure of tempered martensite. Nukleacija izločkov Mspodaj{23}Cspodaj6 poteka na površini izločkov Fespodaj{3}C z visoko vsebnostjo kroma. V začetku je vsebnost kroma v izločkih Mspodaj{23}Cspodaj6 visoka, nato pa s trajanjem žarjenja zraste do sestave približno Cr18Fe3Mo2C6, ki je Crspodaj{18}Fespodaj{3}Mospodaj{2}Cspodaj6 v ravnotežju s sestavo ferita. Nukleacija in hitrost rasti sta odvisni od Gibbsove proste energije karbidov ter od vsebnosti in difuzijskega pritoka karbidotvornih elementov v trdni raztopini ferita. Predložena je enostavna metoda za izračun povprečne razdalje in velikosti izločkov v jeklu z mikrostrukturo iz popuščenega martenzita.

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2014 Ameen, Mohammed Chandrasekaran, Kesavan Ganesh, Radhakrishnan Kumar, Raja Pavan http://rightsstatements.org/vocab/InC/1.0/ application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-3PFU7MQI http://www.dlib.si/details/URN:NBN:SI:doc-3PFU7MQI eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Optimization of the process parameters for dry-sliding wear of an Al 2219-SiCp composite using the Taguchi-based grey relational analysis: Optimiranje procesnih parametrov pri suhi obrabi z drsenjem kompozita Al 2219-SiCp s Taguchijevo sivo relacijsko analizo: This article focuses on an approach based on the Taguchi method with grey relational analysis for optimizing the process parameters for the dry-sliding wear of Al 2219-SiC particulate composites with multi-performance characteristics. The grey relational grade obtained with the grey relational analysis is used to optimize the process parameters. The optimum process parameters can then be determined with the Taguchi method using the grey relational grade as the performance index. The composite was fabricated via a powder-metallurgy route with the mass fractions of (10, 15 and 20) % and precipitated at (500, 550 and 600) °C. The dry-sliding-wear test was conducted on a pin-on-disc wear-testing machine for the normal loads of (10, 20 and 30) N and at disc speeds of (400, 500 and 600) r/min. The performance indicators of the wear test were the wear rate, the coefficient of friction, the friction force and the temperature rise of the pin. Further, optimization of the process parameters was performed using the Taguchi-based grey relational analysis followed by ANOVA to determine the percentage contributions of the process parameters to the wear performance of the composites. An L9 orthogonal array was used for the optimization study. The influences of individual process parameters on the wear performances of the composites are analyzed and presented in this study. Članek obravnava približek, ki temelji na Taguchijevi metodi sive relacijske analize za optimiranje procesnih parametrov pri obrabi s suhim drsenjem zrnatega kompozita Al 2219-SiC z več zmogljivostmi. Za optimiranje procesnih parametrov so bile uporabljene sive relacijske stopnje, dobljene iz sive relacijske analize. Optimalne procesne parametre je mogoče določiti s Taguchijevo metodo z uporabo sive relacijske stopnje kot indeksom zmogljivosti. Kompozit je bil izdelan po postopku prašne metalurgije z masnim deležem (10, 15 in 20) % in izločenem pri (500, 550 in 600) °C. Preizkus obrabe pri suhem drsenju je bil izvršen na napravi "pin on disc" za preizkušanje obrabe pri obremenitvah (10, 20 in 30) N in hitrosti vrtenja plošče s (400, 500 in 600) r/min. Indikatorji zmogljivosti pri preizkusu obrabe so: hitrost obrabe, koeficient trenja, sila trenja in naraščanje temperature preizkušanca. Nadaljnja optimizacija parametrov procesa je bila izvršena s Taguchijevo sivo relacijsko analizo, ki ji je sledila ANOVA za določanje deleža parametrov procesa na vedenje kompozita pri obrabi. Ortogonalna namestitev L9 je bila vzeta za študij optimiranja. V tej študiji je predstavljen vpliv posameznih parametrov procesa na vedenje obrabe kompozita.

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2008 Kroupa, Tomáš Laš, Vladislav http://rightsstatements.org/vocab/InC/1.0/ application/html application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-KWCWOPOC http://www.dlib.si/details/URN:NBN:SI:doc-KWCWOPOC eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article The off-axis behavior of a unidirectional fiber-reinforced plastic composite: Zunajosno obnašanje enosmernih z vlakni ojačenih plastičnih kompozitov: Numerical and experimental investigations of the off-axis behavior of a unidirectional fiber-reinforced plastic composite consisting of carbon fibers and an epoxy matrix are presented. Static tensile tests of thin carbon-epoxy composite strips with various fiber directions were performed and simulated using a finite-element program. Pack's action-plane concept (failure criterion) and progressive failure analysis were used for the damage prediction of the tested thin strips. A non-linear stress-strain relation was used for modeling the off-axis behavior. The relation between the tensile force and the displacement in the direction of the loading force and the ultimate tensile force, which caused damage and the ultimate displacement of specimens, were measured and compared with the results of the numerical simulation. The fiber directions of the specimens, measured from the directionof loading, were in the interval 0compositum-90compositum. Good agreement between the experimental results and the numerical simulations was achieved. The non-linear stress-strain relation was verified for the case of along-fiber carbon-epoxy composite loaded with a static tensile loading force. Predstavljeni so rezultati laboratorijske in numerične raziskave zunajosnega obnašanja enosmernih laminatov iz ogljikovih vlaken in epoksi matice. Izvršeni so bili statični preizkusi tankih kompozitnih lamel z različno smerjo vlaken in simulirani z uporabo metode končnih elementov za napoved pojava poškodbe preizkusnih tankih lamel. Nelinearen odnos napetost deformacija je bil uporabljen za modeliranje zunaj osnega obnašanja. Določeno je bilo razmerje med natezno silo in premikom v smeri obremenitve in končna natezna sila, ki je povzročila poškodbo ter končni premik in oboje je bilo primerjano z rezultati numerične simulacije. Kot med smerjo vlaken v vzorcih in med smerjo obremenitve je bil med 0kompozitum in 90kompozitum. Doseženo je bilo dobro ujemanje med eksperimentalnimi rezultati in rezultati simulacije. Nelinearen odnos napetost deformacija je bil preverjen za primer dolgovlaknatih ogljik-epoksi kompozitov, obremenjenih s statično silo.

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2013 Birlik, Isil Celik, Erdal Culha, Osman Engel, Sebastian Holzapfel, Bernhard Toparli, Mustafa http://rightsstatements.org/vocab/InC/1.0/ application/html application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-F7TIZWKZ http://www.dlib.si/details/URN:NBN:SI:doc-F7TIZWKZ eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Characterization and determination of mechanical properties of YBCO superconducting thin films with manganese using the TFA-MOD method: Karakterizacija in določitev mehanskih lastnosti superprevodne tanke plasti YBCO z manganom po metodi TFA-MOD: The aim of this study is to determine the microstructure, superconducting and mechanical properties of YBasub{2}Cusub{3}Osub{6.56} (YBCO) and YBCO thin films with a manganese (Mn) addition. All the YBCO superconducting films (undoped and Mn-doped) were dip-coated onto (001) SrTiOsub3 (STO) single-crystal substrates with a metalorganic deposition using the trifluoroacetate (TFA-MOD) technique. The phase analysis, microstructure, surface morphologies and critical temperature (Tsubc) of the superconducting thin films were determined with an X-ray diffractometer (XRD), a scanning electron microscope (SEM), an atomic force microscope (AFM) and an inductive Tsubc measurement system. Since the main issue of this study is to determine the mechanical-property variations of the superconducting thin films with/without a Mn addition, the adhesion strength of these films on a STO substrate was tested with a Shimadzu scratch tester. Depending on the Mn addition, the critical forces of pure films increase from 56.23 mN, 58.63 mN and 60.11 mN for pure YBCO, YBCO with 0.05 g and 0.10 g of Mn. Furthermore, Young's modulus and the hardness ofthe undoped and Mn-doped YBCO thin films were measured with a CSM Berkovich nanoindenter using the load-unload sensing analysis under a 0.3 mN applied load. Namen te študije je določiti mikrostrukturo, superprevodne in mehanske lastnosti YBaspodaj{2}Cuspodaj{3}Ospodaj{6,56} tanke plasti YBCO z dodatkom mangana (Mn). Vse superprevodne plasti YBCO (nedopirane in dopirane zMn) so bile nanesene na monokristalni substrat (001) SrTiOspodaj3 s kovinoorganskim nanosom s trifluoracetatno tehniko (TFA-MOD). Fazna analiza, mikrostruktura, morfologija površine in kritična temperatura Tspodajc superprevodne tanke plasti so bile določene z rentgenskim difraktometrom (XRD), vrstičnim elektronskim mikroskopom (SEM), mikroskopom na atomsko silo (AFM) in induktivnim merilnim sistemom za Tspodajc. Ker je bila glavna naloga te študije določanje spreminjanja mehanskih lastnosti YBCO z dodatkom Mn in brez njega, je bila preizkušena adhezivnost te plasti na STO-podlago s Shimadzu preizkuševalnikom za razenje. Odvisno od dodatka Mn kritična sila v čisti plasti narašča od 56,23 mN, 58,63 mN in 60,11 mN za čisti YBCO, YBCO z 0,05 g in 0,10 g Mn. Poleg tega sta bila izmerjena tudi Youngov modul in trdota nedopirane in z Mn dopirane tanke plasti YBCO z nanomerilnikom trdote CSM Berkovich z analizo zaznavanja obremenjeno - neobremenjeno pri uporabljeni obremenitvi 0,3 mN.

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2010 Drev, Darko Panjan, Jože http://rightsstatements.org/vocab/InC/1.0/ application/html application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-C498PANS http://www.dlib.si/details/URN:NBN:SI:doc-C498PANS slv Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Nekaj možnih postopkov izdelave hidrofobnih in oleofobnih polimernih membran ter njihova uporaba: Hydrophobic and olephobic membrane usage and production processes: Hydrophobic and oleophobic membrane properties are very desirable for certain filtration process, giving them an advantage over other materials. A polytetrafluoroethylene (PTFE) membrane production process is presented, revealing a minimum membrane pore size of approximately 0.01 m. It follows that such membranes are not suitable for very fine filtration uses (ultrafiltration, reverse osmosis). In addition to PTFE, polysiloxanes are also marked by enhanced hydrophobic and oleophobic properties. However, polysiloxane membranes suffer from severe production process limitations as their production has thus far not been possible via classical phase inversion processes. Thus, several oleophobic and hydrophobic coatings based on mechanic foams and emulsions have been introduced as a crude replacement for expensive PTFE membranes. These require the introduction of a suitable hydrophobic or oleophobic material such as fluorocarbon into the polymer matrix. However, the degree of the resulting membrane opennes and pore size are not comparable to those of PTFE membranes. In this paper, I present a new production process for asymetric polysiloxane membranes that provides the basis of a solution to this problem. This process could allow the creation of very fine asymetric polysiloxane membranes that would have a large comparative advantage to polymers existing today. Pri nekaterih vrstah uporabe so zelo zaželene hidrofobne in oleofobne lastnosti membran. To daje takšnim membranam odločilno prednost pred drugimi materiali. Na podlagi prikazanega postopka izdelave PTFE-membran je razvidno, da njihove pore ne morejo biti manjše od pribl. 0,01 m. To pomeni, da tovrstne membrane ne moremo uporabljati pri zelo finih filtracijah (ultrafiltracija, reverzna osmoza). Poleg politetrafluoretilena imajo zelo izražene hidrofobne in oleofobne lastnosti tudi polisiloksani. Tako kot obstajajo omejitve pri izdelavi PTFE-membran, so tudi pri polisiloksanih (silikonih). Polisiloksanskih membran žal ni mogoče izdelati po klasičnem postopku inverzije faz. Kot zelo grobi nadomestki za drage PTFE-membrane so se uveljavili tudi razni oleofobni in hiodrofobni premazi na osnovi mehanskih pen in emulzij. V obeh primerih mora biti v osnovno matrico vgrajen ustrezni hidrofobni in oleofobni material (na primer fluorkarbon). Odprtost strukture in velikost por pri tovrstnih materialih še zdaleč ni primerljiva s PTFE-membranami. V tem članku je opisan nov postopek izdelave asimetričnih polisiloksanskih membran, ki je osnova za rešitev nastalega problema. Na podlagi takšnega postopka bi bilo morda možno izdelati tudi zelo fine asimetrične polisiloksanske membrane, ki bi imele veliko primerjalno prednost pred vsemi drugimi polimernimi materiali.

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2007 Jenko, Monika http://rightsstatements.org/vocab/InC/1.0/ application/html application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-L9FJWS4J http://www.dlib.si/details/URN:NBN:SI:doc-L9FJWS4J eng slv Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Šestdeset let prof. dr. Vasilija Prešerna: Laudation in honour of professor dr. Vasilij Prešern on the occasion of his 60th birthday:

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2004 Glogovac, Branislav Jaklič, Anton Jamer, Jure Keček, Branislav Kolenko, Tomaž http://rightsstatements.org/vocab/InC/1.0/ application/html application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-1D5G8ALS http://www.dlib.si/details/URN:NBN:SI:doc-1D5G8ALS slv Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Simulacijski model ogrevanja gredic v peči Allino: This paper presents a simulation model of billet reheating in the Allino furnace at the Metal Ravne Steelworks. The model is connected to a monitoring system of the Allino furnace and simulates in real-time. The heat exchange between the furnace gas, the furnace wall and the billet surface is calculated using a three-temperature model. The exact treatment of the complex geometry of the furnace enclosure, including the billets, is important in radiation heat-exchange calculations. In the model the radiation heat exchange between surfaces in the furnace enclosure is determined using a view-factor matrix. The matrix is determined before the simulation by a general model for view-factor determination based on the Monte Carlo method. The furnace bottom temperature depends on the number of charged billets in the furnace. In the model furnace the bottom temperature is calculated on the basis of heat balance on the furnace bottom for an individual furnace length segment. The heat conduction in the billets is determined using the 3D finite-difference method. The model is validated using measurements of billet reheating in the Allino furnace. A graphical user interface (GUI) has been developed to assure user-friendly use of the simulation model. V prispevku je predstavljen simulacijski model ogrevanja gredic v peči Allino v valjarni Metal Ravne. Simulacijski model deluje v realnem času in je vključen v nadzorni sistem peči Allino. Izmenjava toplote med dimnim plinom, steno peči in gredico je obravnavana z modelom treh temperatur. Obravnava toplotnega sevanja pri ogrevanju gredic zahteva natančno upoštevanje kompleksne geometrije, ki jo imajo stene peči, skupaj z založenimi gredicami. Izmenjava toplote med ploskvami v peči je zato v modelu obravnavana z uporabo matrike geometrijskih faktorjev vidnosti. Ta matrika je predhodno določena s splošnim modelom za izračun matrike geometrijskih faktorjev vidnosti z uporabo metode Monte Carlo. Temperatura poda peči je odvisna od trenutne založitve v peči. V modelu je za posamezni dolžinski segment določena z bilanco toplotnih tokov na podu peči. Prevajanje v gredicah je obravnavano z metodo končnih diferenc v treh prostorskih dimenzijah. Vrednotenje modela smo izvedli z meritvami ogrevanja preskusne gredice v peči Allino. Za uporabniško prijazno delo je bil za simulacijski model razvit grafični uporabniški vmesnik (GUI).

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2013 Aydeniz, Ali Imre Calli, Cagdas Dil, Gökce Göksenli, Ali Muhaffel, Faiz Yüksel, Behiye http://rightsstatements.org/vocab/InC/1.0/ application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-IUZTPXHG http://www.dlib.si/details/URN:NBN:SI:doc-IUZTPXHG eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Electroless Ni-B-W coatings for improving hardness, wear and corrosion resistance: Nanašanje Ni-B-W s cementacijskim galvaniziranjem za izboljšavo trdote, obrabe in odpornosti proti koroziji: In this study the formation of a Ni-B-W coating on steel using an electroless plating process and evaluation of the hardness, wear and corrosion resistance was analyzed. The Ni-B-W coating was prepared using an alkaline borohydride-reduced electroless nickel bath. Scanning electron microscopy (SEM) of the cross-sectional view of the Ni-B-W coating was analyzed and the layer characteristics were investigated. The Ni-B-W coating was characterized using XRD. The study reveals that the Ni-B-W coating is amorphous in the as-plated condition and after heat treatment at 450 °C for 1 h the Ni-B-W coatings crystallize and produce nickel and nickel borides. The hardness of the as-plated and heat-treated Ni-B-W coatings were compared with Ni-B coatings. In both coatings the hardness increased with heat treatment. The wear resistance of Ni-B-W coatings annealed at different temperatures was analyzed using a ball-on-flat test. The wear resistance of the coating increased with heat treatment and reached a maximum value at 400 °C. An optical microscope and EDS analysis were applied on the wear tracks to determine the wear mechanism. Ductile failure and an abrasive wear mechanism were dominant for the coating heat treated up to 400 °C. Network cracks and shearing marks were detected for the coatings annealed at 450 °C and above, indicating brittle failure. For investigating the corrosion characteristics of the coatings, immersion tests in 5 % H2SO4 and 10 % HCl acidic solutions for seven days were applied. According to the corrosion test results, the Ni-B-W coatings showed good corrosion resistance in the H2SO4 solutions. V tej študiji je bil analiziran postopek cementacijskega galvaniziranja za nanašanje Ni-B-W na jeklo in analizirana je bila trdota, obraba in korozijska odpornost. Nanos Ni-B-W je bil pripravljen z uporabo alkalne z borhidridom reducirane cementacijske galvanske kopeli niklja. Z vrstičnim elektronskim mikroskopom (SEM) je bil analiziran prečni prerez nanosa Ni-B-W in preiskane so bile značilnosti plasti. Nanos Ni-B-W je bil karakteriziran z XRD. Študija je odkrila, da je nanos Ni-B-W amorfen v nanesenem stanju, po toplotni obdelavi pri 450 °C, 1 h je bil nanos Ni-B-W kristaliziran in nastali so nikelj in nikljevi boridi. Primerjani sta bili trdota nanesenega in toplotno obdelanega nanosa Ni-B-W. V obeh primerih je trdota narastla s toplotno obdelavo. S preizkusom s kroglico na ploskvi je bila preizkušena obrabna odpornost nanosa Ni-B-W, žarjenega pri različnih temperaturah. Odpornost proti obrabi se je povečevala s toplotno obdelavo in je dosegla najvišjo vrednost pri 400 °C. Svetlobni mikroskop in EDS-analiza sta bila uporabljena na obrabljeni tečini, da bi ugotovili mehanizem obrabe. Žilav prelom in mehanizem abrazijske obrabe sta prevladovala pri nanosu, segretem do 400 °C. Pri nanosu, segretem na 450 °C in višje, se je pojavila mreža razpok in znaki striženja, kar kaže na krhek prelom. Za ugotavljanje korozijskih lastnosti so bili uporabljeni preizkusi s potapljanjem sedem dni v raztopino 5 % H2SO4 in 10 % HCl. Pri korozijskem preizkusu je nanos Ni-B-W pokazal dobro korozijsko odpornost v raztopini H2SO4.

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2011 Klančnik, Grega Medved, Jože http://rightsstatements.org/vocab/InC/1.0/ application/html application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-HQQZPWLR http://www.dlib.si/details/URN:NBN:SI:doc-HQQZPWLR eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Thermodynamic investigation of Al-Sb-Zn system: Termodinamska raziskava sistema Al-Sb-Zn:

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2014 Kim, Kitae Ko, Sehyun Shin, Jesik http://rightsstatements.org/vocab/InC/1.0/ application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-2K9RZZQS http://www.dlib.si/details/URN:NBN:SI:doc-2K9RZZQS eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Development of low-Si aluminum casting alloys with an improved thermal conductivity: Razvoj aluminijeve livarske zlitine z majhno vsebnostjo Si in izboljšano toplotno prevodnostjo: To develop an aluminum alloy that can combine a high thermal conductivity witha good castability and anodizability, low Si-containing aluminum alloys, Al-(0.5-1.5)Mg-1Fe-0.5Si and Al-(1.0-1.5)Si-1Fe-1Zn alloys were assessed as potential candidates. The developed alloys exhibited a thermal conductivity of 170-190 % level (160-180 W/(m K)), a fluidity of 60-85 % level, and an equalor higher ultimate tensile strength compared to those of an ADC12 alloy. In each developed alloy system, the thermal conductivity and the strength decreased and increased, respectively, as the content of the major alloying elements, Mg and Si, increased. The fluidity was inversely proportional to the Mg content and directly proportional to the Si content. The Al-(1.0-1.5)Si-1Fe-1Zn alloys showed better thin-wall castability due to their lower surface energy. In the experimental aluminum alloys with a low Si content, the fluidity was mainly dependent on the melt surface energy, the Al dendrite coherency point (DCP), and the first intermetallic crystallization point (FICP), rather than on the solidification interval, latent heat, or the viscosity. Za razvoj aluminijeve zlitine, ki združuje dobro toplotno prevodnost z dobro livnostjo in možnostjo eloksiranja, se predvideva, da sta dobro izhodišče aluminijevi zlitini z majhno vsebnostjo Si, kot sta Al-(0,5-1,5)Mg-1Fe-0,5Si in Al-(1,0-1,5)Si-1Fe-1Zn. Razvite zlitine so pokazale, da je toplotna prevodnost med 170-190 % (160-180 W/(m K)), livnost med 60-85 % in enaka natezna trdnost, kot jo ima primerjalna zlitina ADC12. V vsakem razvitem sistemu je toplotna prevodnost naraščala in trdnost padala, ko je naraščala vsebnost glavnih legirnih elementov Mg in Si. Tekočnost je bila obratno sorazmerna z vsebnostjo Mg in sorazmerna z vsebnostjo Si. Zlitina Al-(1,0-1,5)Si-1Fe-1Zn je pokazala boljšo livno sposobnost pri tankih stenah zaradi manjše površinske energije. Pri preizkusnih aluminijevih zlitinah z majhno vsebnostjo Si je bila tekočnost predvsem odvisna od površinske energije taline, koherenčne točke Al-dendritov (DCP) in prve točke strjevanja (FICP) intermetalne zlitine in manj od intervala strjevanja, latentne toplote ali viskoznosti.

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2000 Šelih, Jana Treppo-Mekiš, Barbara http://rightsstatements.org/vocab/InC/1.0/ application/html application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-B07G0F3O http://www.dlib.si/details/URN:NBN:SI:doc-B07G0F3O slv Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Optimizacija količine veznega materiala v betonih visoke trdnosti: Optimization of binding material quantity for high-strength concrete: Fresh high-strength concrete has to be sufficiently workable if its quality is to be ensured. On the other hand, high-strength concrete can only be produced if aggregate mix contains minimum possible void quantity. The voids of the optimized aggregate mix have to be filled by cement paste with an overfill that ensures sufficient workability/consistency. Mineral and chemical admixtures have to be used in the production of high quality cement paste. The paper presents the determination of minimum cement paste quantity that ensures the production of concrete that is sufficiently workable to be used on construction site. Compressive strengths are approximately 70 MPa at the age of 28 days. Different types of aggregate and variable mineral admixture quantities were employed in the composition of concrete. Kvaliteten beton visoke trdnosti mora imeti v svežem stanju dovolj veliko obdelavnost oz. vgradljivost. Obenem pa lahko tak beton izdelamo le, če je mešanica agregata takšna, da je v njej najmanjša možna količina praznin. Praznine tako optimizirane sestave agregata je treba zapolniti s cementno pasto ustrezne kakovosti in dodati še neki presežek paste, ki zagotavlja primerno obdelavnost - konsistenco betona. Za izdelavo dovolj kakovostne cementne paste je treba uporabiti še mineralne in kemične dodatke. Članek prikazuje določanje minimalne vsebnosti cementne paste oz. kamna kot veznega materiala, ki hkrati še omogoča zadostno obdelavnost betona visoke trdnosti za praktično uporabo. Tlačne trdnosti tako proizvedenih betonov so okrog 70 MPa po 28 dnevih, pri njihovi pripravi pa smo uporabljali različne vrste agregata ter spremenljivo količino mineralnega dodatka.

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2013 Dobrovská, Jana Dobrovská, Věra Francová, Hana Kavička, František Stransky, Karel http://rightsstatements.org/vocab/InC/1.0/ application/html application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-7UONUYI5 http://www.dlib.si/details/URN:NBN:SI:doc-7UONUYI5 eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article A new approach to evaluating the chemical micro-heterogeneity of a continuously cast steel slab: Nov način ocenjevanja kemijske mikroheterogenosti kontinuirno ulitih slabov: The paper deals with a new approach to measuring and evaluating the chemical micro-heterogeneity of the elements in solidified poly-component metallic systems. The original approach is based on experimental measurements made on the samples taken from characteristic places in a casting and the subsequent application of an original mathematical model for determining the element-distribution profile, characterizing the most probable distribution of an element concentration in the frame of a dendrite, and an original mathematical model for determining the effective partition coefficients of these elements in the structure of the analyzed alloy. The paper also describes an application of this method in the research of the chemical heterogeneity on a cross-section of a CC steel slab and presents the selected results (indices of the heterogeneity and effective partition coefficients of seven analyzed elements) characterizing the chemical micro-heterogeneity on one-half of the cross-section of this CC steel slab. The following main results were obtained: (i) the dendritic heterogeneity of the accompanying elements and impurities is comparatively high; (ii) all the analyzed elements segregate during the solidification into an inter-dendritic melt, and their partition coefficient is smaller than one; (iii) the effective partition coefficients calculated in this new way inherently include both the effect of segregation in the course of an alloy solidification, and the effect of the homogenization occurring during the solidification as well as during the cooling of an alloy. Članek obravnava nov način merjenja in ocenjevanja kemijske mikroheterogenosti elementov v večkomponentnih kovinskih sistemih. Izviren način temelji na eksperimentalnih meritvah, narejenih na vzorcih, vzetih iz značilnih mest ulitka, in uporabi izvirnega matematičnega modela za določanje profila razporeditve elementov, kar omogoča oceno najbolj verjetne razporeditve koncentracije elementov v dendrite in določanje efektivnega koeficienta razporeditve teh elementov v strukturi analizirane zlitine. Članek opisuje tudi uporabo te metode pri raziskavi kemijske heterogenosti prečnega prereza kontinuirno ulitega slaba in predstavlja izbrane rezultate (indeks heterogenosti in koeficiente razporeditve sedmih analiziranih elementov) značilne kemijske mikroheterogenosti polovice prereza kontinuirno ulitega slaba. Glavni rezultati so: (i) heterogenost spremljajočih elementov in nečistoč je razmeroma velika; (ii) vsi analizirani elementi izcejajo med strjevanjem v meddendritno talino, njihov koeficient razporeditve je manjši odena; (iii) na nov način izračunani koeficienti razporeditve vključujejo v sebi oba učinka, to je učinek izcejanja med potekom strjevanja in učinek homogenizacije, ki se pojavi med strjevanjem, in nadaljnjim ohlajanjem zlitine.

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2015 Ćurčija, Dušan Mamuzić, Ilija Vodopivec, Franc http://rightsstatements.org/vocab/InC/1.0/ application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-6E9X7N5M http://www.dlib.si/details/URN:NBN:SI:doc-6E9X7N5M eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Reynolds differential equation singularity using processes of small straining with lubrication: Reynoldsova diferencialna enačba pri procesih majhne deformacije z mazanjem:

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2000 Baš, Maja Jamar, Nina Južnič, Primož http://rightsstatements.org/vocab/InC/1.0/ application/html application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-5ME6WC7S http://www.dlib.si/details/URN:NBN:SI:doc-5ME6WC7S slv Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Bibliometrično-bibliografska primerjava revije Železarski zbornik (1967/1968) in Kovine zlitine tehnologije (1996/1997): Bibliometric-bibliographic comparison of the journal Železarski zbornik (1967/1968) and Kovine zlitine tehnologije (1996/1997): In this paper the results of bibliometric analysis of the journal Kovine zlitine tehnologije vo. 30, 31 (1996, 1997) in comparison with the journal Železarski zbornik vol. 1, 2 (1967, 1968) as it was named previously, are discussed. The results show the development of the journal and progress in quality in these years. Analyzing with bibliometric methods we establish that: -the number of authors and also the number of institutes is increasing; -the fields of work dealt with in a journal have extended; -the professional journal has become scientific journal. V prispevku so prikazani rezultati bibliometrijske analize revije Kovine zlitine tehnologje vol. 30 in 31 (1996, 1997) primerjalno z revijo Železarski zbornik vol. 1 in 2 (1967, 1968), kot se je rev ija Kovine zlitine tehnologije imenovala na začetku svojega izhajanja. Rezultati kažejo na razvoj revije in velik kakovostni preskok v teh letih. Bibliometrijsko smo lahko izmerili naslednje spremembe revije: -povečuje se število avtorjev pri posameznem članku, širi se število avtorjev in število ustanov, iz katerih prihajajo; -razširilo se je področje, ki ga obravnavajo objave iz revije; -revija je iz strokovne revije prešla v znanstveno revijo.

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2014 Bílek, Pavel Čaplovič, L'ubomír Hudáková, Mária Jurči, Peter Novák, Michal http://rightsstatements.org/vocab/InC/1.0/ application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-AOGCVX48 http://www.dlib.si/details/URN:NBN:SI:doc-AOGCVX48 eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Tribology of CrAg7N coatings deposited on Vanadis 6 ledeburitic tool steel: Tribologija prevlek CrAg7N na ledeburitnem orodnem jeklu Vanadis 6: Samples made from Vanadis 6 PM ledeburitic tool steel were surface machined, ground and mirror polished. Prior to the deposition, they were heat treated to a hardness of 60 HRC. The CrAg7N coating was deposited with the magnetron-sputtering technique, using pure-Cr and Ag targets in a composite low-pressure nitrogen/argon atmosphere and at a temperature of 500 °C in the Hauzer Flexicoat 850 device. Tribological testing using a pin-on-disc apparatus was carried out at ambient and elevated temperatures: (300, 400 and 500) °C, respectively. Al2O3, 100Cr6 and CuZn balls were used as the counterparts. The wear tracks after the pin-on-disc testing were analyzed with scanning electron microscopy and a microanalysis. The experiments have shown a strong dependence of tribological parameters on the temperature. The friction coefficient of CrN-Ag against the 100Cr6 ball at ambient temperature was mi = 0.56. Tribological sliding tests of this coating system against the alumina balls indicate a decrease in the friction coefficient due to the increasing temperature. At ambient temperature mi = 0.68 and its minimum occurred at the temperature of 400 °C, mi = 0.24. This is attributed to the diffusion of Ag particles to the sliding top surface at elevated temperature. The testing against the CuZn brass ball generally gave a lower friction coefficient at ambient temperature, mi = 0.39. In contrast, the friction coefficient slightly increased with the increasing temperature and was practically constant at elevated temperatures, ranging between mi = 0.43-0.48. Vzorci, izdelani iz ledeburitnega orodnega jekla Vanadis 6 PM, so bili površinsko obdelani, brušeni in zrcalno polirani. Pred nanosom so bili toplotno obdelani na trdoto 60 HRC. S tehniko magnetronskega naprševanja in z uporabo tarč iz čistega Cr in Ag je bila nanesena CrAg7N-nanoprevleka v sestavljeni nizkotlačni atmosferi iz dušika in argona pri temperaturi 500 °C v napravi Hauzer Flexicoat 850. Tribološki preizkusi s preizkuševalnikom "pin-on-disc" so bili izvršeni pri sobni temperaturi in pri povišanih temperaturah (300, 400 in 500) °C. Krogle Al2O3, 100Cr6 in CuZn so bile uporabljene kot par. Sledi obrabe po preizkusu "pin-on-disc" so bile analizirane z vrstično elektronsko mikroskopijo in z mikroanalizo. Eksperimenti so pokazali močno odvisnost triboloških parametrov od temperature. Koeficient trenja CrN-Ag proti krogli 100Cr6 pri sobni temperaturi je bil mi = 0,56. Tribološki drsni preizkusi te prevleke proti kroglam Al2O3 kažejo zmanjšanje koeficienta trenja z naraščajočo temperaturo. Pri sobni temperaturi je bil mi = 0,68, minimum pa se je pojavil pri temperaturi 400 °C, mi = 0,24. To se pripisuje difuziji delcev Ag na drsno površino pri povišanih temperaturah. Preizkušanje v paru s CuZn in medeninasto kroglo je dalo na splošno nižje koeficiente trenja pri sobni temperaturi, mi = 0,39. Nasprotno pa je koeficient trenja malo narasel pri povišanju temperature in je bil pri povišanih temperaturah praktično konstanten v območju mi = 0,43-0,48.

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2003 Arzenšek, Boris Kmetič, Dimitrij Vodopivec, Franc Vojvodič-Tuma, Jelena http://rightsstatements.org/vocab/InC/1.0/ application/html application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-DBL1ER3H http://www.dlib.si/details/URN:NBN:SI:doc-DBL1ER3H eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article On the Charpy fracturing process: O procesu Charpyjevega preloma: The Charpy fracturing process was investigated for two structural steels. The relationships of load versus deflection and time were recorded from the upper to lower shelf temperature and the time and the deformation relative fracturing events were assesed. The consumption of energy for different fracturing events, as f.i. elastic and plastic deflection and crack propagation was deduced. The size of the plastic zone and the stress concentration at the notch tip were also deduced. A specific fracture micromorphology was observed in a thin layer of the fracture surface ahead the notch tip.

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2000 Grabke, Hans Jürgen Riecke, Ernst http://rightsstatements.org/vocab/InC/1.0/ application/html application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-E99O0XMH http://www.dlib.si/details/URN:NBN:SI:doc-E99O0XMH eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Absorption and diffusion of hydrogen in steels: Absorpcija in difuzija vodika v jeklih:

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2014 Drápala, Jaromír Kirillova, Valentina M. Skotnicová, Kateřina Szurman, Ivo Zaporozhets, Oleg I. http://rightsstatements.org/vocab/InC/1.0/ application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-N8DGUJNB http://www.dlib.si/details/URN:NBN:SI:doc-N8DGUJNB eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Investigation of physical properties of tungsten-based single crystals using an ultrasonic method: Preiskava fizikalnih lastnosti monokristalov na osnovi volframa z metodo ultrazvoka: Using an ultrasonic method, the measurement of longitudinal and transversal velocities v of ultrasonic waves in the major crystallographic directions of pure-tungsten single crystals and tungsten single crystals alloyed with Ta and Mo was performed. Single crystals with a 110 crystallographic orientation were prepared by plasma-arc melting. Crystal density r was also measured. Crystal elastic constants C ij , anisotropy factors A , Young's modulus E , shear modulus G and bulk modulus B for the given crystallographic directions, and the mean values of the longitudinal and transversal velocities of the ultrasound according to the Fochtu-Roisu-Chilly method, Young's modulus, shear modulus, Poisson's ratio and Debye temperature were calculated from the obtained data. The measurement of ultrasound rates was realized by means of a pulse apparatus with a frequency of 10 MHz to 30 MHz. It was found that the alloying of pure tungsten with the elements such as tantalum and molybdenum led to a decrease in the average magnitudes of v, C ij, and B over various crystallographic and polarization directions, as well as the magnitude of r. The effects of the alloying elements on the elastic properties of tungsten crystals were identical. It may be concluded on the basis of the obtained results that the ultrasonic method can be used for the quality control of the purity of tungsten single crystals and tungsten low-alloyed alloys by measuring the attenuation effects of ultrasound waves in various parts of the tested samples. Z ultrazvočno metodo je bila izvršena meritev longitudinalne in transverzalne hitrosti nu ultrazvočnih valov v glavnih kristalografskih smereh kristalov čistega volframa in volframovega monokristala, legiranega s Ta in Mo. Monokristali s kristalografsko orientacijo 110 so bili izdelani s taljenjem v plazemskem obloku. Izmerjena je bila gostota rho kristala. Iz dobljenih podatkov so bili izračunani: elastična konstanta C ij kristala, faktor anizotropije A , Youngov modul E , strižni modul G in elastični modul pri stiskanju B pri dani kristalografski smeri in glavne vrednosti longitudinalnih in transverzalnih hitrosti ultrazvoka po Fochtu-Roisu-Chillyjevi metodi, Youngov modul, strižni modul, Poissonovo razmerje in Debyejeva temperatura. Meritev hitrosti ultrazvoka je bila izvršena s pulzatorjem s frekvenco od 10 MHz do 30 MHz. Ugotovljeno je, da legiranje čistega volframa z elementi, kot sta tantal in molibden, povzroči zmanjšanje povprečnih veličin v, C ij in B v številnih kristalografskih in polarizacijskih smereh, kot tudi veličino rho. Vpliv legirnih elementov na elastične lastnosti kristalov volframa je bil enak. Na podlagi dobljenih rezultatov se lahko sklene, da se ultrazvočna metoda lahko uporabi za kontrolo kvalitete monokristalov volframa in njegovih malo legiranih zlitin z meritvijo oslabitve ultrazvočnih valov v različnih delih preizkušanih vzorcev.

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2006 Li, Yingzhi Šturm, Roman http://rightsstatements.org/vocab/InC/1.0/ application/html application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-FDK342VG http://www.dlib.si/details/URN:NBN:SI:doc-FDK342VG eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Small-punch testing of a weld´s heat-affected zones: Testiranje lezenja toplotno vplivanih področij vara z uporabo majhnega bata: Small-punch creep tests were performed on four different zones of a P91 welded joint: the base metal (BM), the weld metal (WM), the heat-affected zone on the base-metal side (HAZ-BM) and the heat-affected zone on the weld-metal side (HAZ-WM). In addition to the creep-rupture times, full creep-deflection curves were also available, from which the creep properties of different HAZ zones could be derived. In this paper an analytic approach based on Chakrebarty´s membrane-stretch model and Kachanov´s creep law is used to interpret the creep-deflection curves of different zones. First of all, the strains and stresses are derived from the observed deflection curves according to Chakrebarty´s membrane-stretch model, then the Kachanov parameters are determined by attempting to minimize the sum of the squares of the residuals (the difference between the derived stains and the calculated strains at each time point). With the Kachanov parameters known, all the creep properties of the different zones of the welded joint can be obtained. Preskušanje lezenja z majhnim batom je bilo opravljeno na štirih različnih področjih P91 varjenega spoja, in sicer na osnovnem materialu (BM), na varu (WM), na toplotno vplivnem področju na strani osnovnega materiala (HAZ-BM) in na toplotno vplivnem področju na strani vara (HAZ-WM). Poleg samih časov lezenja do loma so na razpolago tudi celotne krivulje upogib preizkušanca-čas,na osnovi katerih je možno določiti lastnosti lezenja različnih toplotno vplivnih področij. V prispevku smo uporabili analitičen način interpretacije krivulj lezenja (odvisnost upogib preizkušanca-čas) preizkušancev, vzetih iz različnih območij varjenega spoja P91. Analitični način temelji na Chakrebartyjevem modelu raztezanja membrane in na Kachanovem zakonu lezenja. Najprej se iz časovno odvisnih krivulj upogibanja preizkušanca izračuna napetosti in deformacije po Chakrebartyjevem modelu raztezanja membrane. Potem se določijo Kachanovi parametri z minimiziranjem vsote kvadratov ostankov (to je razlika med dobljenimi raztezki in izračunanimi raztezki v vsaki časovni točki). Ko poznamo Kachanove parametr, lahko ocenimo vse lastnosti lezenja posameznega področja varjenega spoja.

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2012 Chaouki, Benazzouz Fouzia, Zekkar Mahfoud, Benkerri Mokhtar, Boudissa Mounir, Reffas Nasser, Menni http://rightsstatements.org/vocab/InC/1.0/ application/html application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-6ESNQBL6 http://www.dlib.si/details/URN:NBN:SI:doc-6ESNQBL6 eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Effect of the antimony thin-film deposition sequence on copper-silicon interdiffusion: Vpliv zaporedja nanosa tankih plasti antimona na interdifuzijo baker-silicij: In this work we present a study of the effect of an antimony layer on the interdiffusion and formation of copper silicides while inverting the sequence of Cu and Sb deposition on Si(111) substrates. Thermal evaporation was used to deposit Cu/Sb and Sb/Cu bilayers on a Si(111) substrate heated at 100 °C, without breaking the vacuum. XRD and RBS analysis showed, for samples heat treated at 200 °C and 400 °C, a segregation of the three elements (i.e., Cu, Sb and Si) to the surface and diffusion in bulk ending in the formation of a layer made of a mixture containing the three elements at the samples' surface. After 200 °C annealing, in the Cu/Sb/Si system, we observed the formation of only Cu2Sb, and for the Sb/Cu/si system, there is the formation of the Cu3Si and Cu2Sb phases; after 400 °C annealing, the Cu-Sb-Si mixture is formed by the cohabitation of the Cu3Si silicide and the Cu2Sb intermetallic compound in the Cu/Sb/Si sample and only Cu2Sb in the Sb/Cu/Si sample. For the Cu/Sb/Si sample, annealed at 400 °C, the SEM micrographs exhibit compound formation with crystallites that have a trapezoidal shape. V delu predstavljamo študijo vpliva plasti antimona na interdifuzijo in formiranje bakrovih silicidov pri inverziji zaporedja nanosa Cu in Sb na Si(111)-podlago. Nanos plasti Cu/Sb in Sb/Cu je bil izvršen s termičnim izhlapevanjem na Si(111)-substrat pri 100 °C brez prekinitve vakuuma. XRD- in RBS-analize vzorcev, žarjenih pri 200 °C in 400 °C, so pokazale segregacijo treh elementov (Cu, Sb in Si) na površini podlage in difuzijo masivnega materiala s tvorbo plasti zmesi treh elementov na površini podlage. Po žarjenju sistema Cu/Sb/Si pri 200 °C je bil opažen nastanek Cu2Sb, v sistemu Sb/Cu/Si pa nastanek faz Cu3Si in Cu2Sb. Po žarjenju pri 400 °C je bilo ugotovljeno sobivanje silicida Cu3Si in intermetalne spojine Cu2Sb pri vzorcu Cu/Sb/Si in samo Cu2Sb pri vzorcu Sb/Cu/Si. Pri vzorcu Cu/Sb/Si, žarjenem pri 400 °C, SEM-posnetki kažejo nastanek spojin s kristali trapezoidne oblike.

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2013 Ipek, Mediha http://rightsstatements.org/vocab/InC/1.0/ application/html application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-LHNKEXLP http://www.dlib.si/details/URN:NBN:SI:doc-LHNKEXLP eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Characterization of an Cu-Cr-Zr alloy synthesized with the powder-metallurgy technique: Karakterizacija zlitine Cu-Cr-Zr, sintetizirane s tehniko prašne metalurgije: A Cu-1.5 % Cr-0.5 % Zr alloy was prepared with the powder-metallurgy (PM) method. Cu-Cr-Zr powders were pressed under 390 MPa of uniaxial compression and sintered at 1000 °C for 2 h. After the holding time, the samples were immediately taken out of the furnace and pressed at 850 MPa. The sintered samples were solution-treated at 1000 °C for 15 min and water quenched. Then they were deformed by 20 % at room temperature and aged at 470 °C for (2, 4, 6 and 8) h. A SEM investigation revealed that the Cr and Zr particles having a limited solubility in Cu distributed homogeneously in the copper matrix. An XRD analysis showed that each sample (sintered and aged at 470 °C for different times) has the same phases: copper and trace Crsub{2}Osub3. The relative density of the sinter-pressed sample increased from 92 % to 96 % due to cold deformation. The microhardness of the samples ranged from 77 HV for the solution-treated and water-quenched sample to 116 HV for the aged sample, and the electrical conductivity of the samples increased from 76 % IACS for the sinter-pressed sample to 87 % IACS for the sample aged for 8 h. Zlitina Cu- 1,5 % Cr- 0,5 % Zr je bila izdelana po metodi prašne metalurgije (PM). Prahovi Cu-Cr-Zr so bili enoosno stisnjeni s 390 MPa in 2 h sintrani na temperaturi 1000 °C. Potem so bili vzorci vzeti iz peči in stisnjeni z 850 MPa. Sintrani vzorci so bili raztopno žarjeni 15 min na temperaturi 1000 °C in ohlajeni v vodi. Nato so bili deformirani za 20 % pri sobni temperaturi in starani (2, 4, 6 in 8) h na temperaturi 470 °C. Preiskava s SEM je odkrila, da imajo delci Cr in Zr omejeno topnost v Cu in da so enakomerno razporejeni v osnovi iz bakra. Rentgenska analiza (XRD) je pokazala, da ima vsak vzorec (sintran in različno dolgo staran na 470 °C) enake faze: baker in sledove Crspodaj{2}Ospodaj3. Relativna gostota sintranega in stisnjenega vzorca je s hladno deformacijo narasla iz 92 % na 96 %. Mikrotrdota vzorcev je bila v območju od 77 HV za raztopno žarjen in v vodi ohlajen vzorec ter do 116 HV za staran vzorec. Električna prevodnost sintranega in stisnjenega vzorca je bila 76 % IACS in je narasla na 87 % IACS pri vzorcu, staranem 8 h.

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2007 Risteski, Ice B. http://rightsstatements.org/vocab/InC/1.0/ application/html application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-14TA9OFJ http://www.dlib.si/details/URN:NBN:SI:doc-14TA9OFJ eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article A new topology for the trajectories of the meniscus during continuous steel casting: Nova topologija trajektorij meniskusa pri neprekinjenem litju jekla: The theoretical basis for a new computational method is given for the topology of the meniscus trajectories during continuous steel casting. The method is based on the solution of the meniscus equation in Â3. Here the topology is treated only in the sense of the categorization of trajectories in an orientation space. This suggests a new type of efficient self-adaptive scheme suitable for the solution of the shape of the meniscus. In the present work a new approach is used to overcome previously unknown pathological, non-physical predictions in various constitutive models derived using closure approximations. The generalized meniscus equation as well as its stability is solved. Here it is shown, for the first time, that the cyclic change of the shape of the meniscus depends on the coordinates, while up to now the cyclic change of the meniscus was presented only as a function of the time over the expression of the mould velocity. Dana je teoretična podlaga za nov izračun topologije trajektorij meniskusa pri neprekinjenem litju jekla. Podlaga metode je resitev enaebe meniskusa Â3. Topologija je obravnavana le v smislu kategorizacije trajektorij v nekem orientacijskem prostoru. To navaja na novo shemo, ki se sama primerno prilagaja za rešitev oblike meniskusa. V tem delu je uporabljen nov način, da bi se obvladalo preje neznane patološke, nefizikalne napovedi v različnih konstitutivnih modelih, ki so bili razviti z uporabo končnih aproksimacij. Rešeni sta splošna enačba meniskusa in njena stabilnost. Prvič je prikazano, da je ciklična sprememba oblike meniskusa odvisna od koordinat, medtem ko se je dosedaj ciklične spremembe meniskusa prikazalo samo kot funkcijo razmerja čas proti hitrosti kokile.

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2003 Burzić, Zijah Curovic, Jelisav Vratnica, Maja http://rightsstatements.org/vocab/InC/1.0/ application/html application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-6JCHH5U6 http://www.dlib.si/details/URN:NBN:SI:doc-6JCHH5U6 eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article The influence of iron and silicon on the microstructure of extruded, high-strength Al-Zn-Cu alloys: Vpliv železa in silicija na mikrostrukturo ekstrudiranih visokotrdnih zlitin Al-Zn-Mg-Cu:

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2017 Aljlil, Saad A. http://rightsstatements.org/vocab/InC/1.0/ application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-HQ71U9YR http://www.dlib.si/details/URN:NBN:SI:doc-HQ71U9YR eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Miswak (Salvadora Persica roots): discovery of a new biomaterial for removing heavy metals from water in Saudi Arabia: Miswak (korenine Salvadora Persica): odkritje novega biomateriala za odstranjevanje težkih kovin iz vode v Saudski Arabiji:

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2017 Choi, Seung-Geon Choi, Woong-Kirl Kim, Seong-Hyun Lee, Eun-Sang http://rightsstatements.org/vocab/InC/1.0/ application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-ET03FLFX http://www.dlib.si/details/URN:NBN:SI:doc-ET03FLFX eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Surface characteristics of Invar alloy according to micro-pulse electrochemical machining: Karakteristike površine Invar zlitine glede na mikropulzno elektrokemično obdelavo:

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2011 Arh, Boštjan Arzenšek, Boris Pirnar, Boštjan Skobir Balantič, Danijela Anica Tehovnik, Franc Žužek, Borut http://rightsstatements.org/vocab/InC/1.0/ application/html application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-IUZ4TKL4 http://www.dlib.si/details/URN:NBN:SI:doc-IUZ4TKL4 eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Microstructure evolution in SAF 2507 super duplex stainless steel: Razvoj mikrostrukture v superdupleksnem nerjavnem jeklu SAF 2507: The change of microstructure for a super duplex stainless steel SAF 2507 during hot rolling was investigated. Its evolution during hot deformation was very different in each phase. The dominant restoration mechanism for ferrite and austenite were dynamic recovery (DRV) and dynamic recrystallization (DRX), respectively. Also, the effect of temperature on the deleterious phase precipitation was investigated. The specimens were heat treated isothermally in the temperature range 800 compositumC to 1000 compositumC. Hardness tests, and optical and scanning electron microscopy were used to detect the sigma phase. Med vročim valjanjem je bil raziskan mikrostrukturni razvoj v superdupleksnem nerjavnem jeklu SAF 2507, ki se med vročo deformacijo razlikuje v vsaki fazi. Prevladujoč mehanizem mehčanja v feritu in avstenitu je bila dinamična poprava in/ali dinamična rekristalizacija. V superdupleksnem nerjavnem jeklu je bil raziskan vpliv temperature na izločanje škodljivih faz. Vzorci so bili izotermno toplotno obdelani v temperaturnem območju od 800 °C do 1000 °C. Uporabljene so bile meritve trdote ter optična in elektronska mikroskopija za analizo sigma-faze.

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2013 Burda, Jiri Dittel, David Fojtik, Pavel Příhoda, Miroslav Pyszko, René Vaculik, Miroslav Velicka, Marek http://rightsstatements.org/vocab/InC/1.0/ application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-MS3VXHQT http://www.dlib.si/details/URN:NBN:SI:doc-MS3VXHQT eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Research of thermal processes for the continuous casting of steel: Raziskave termičnih dogajanj pri kontinuirnem ulivanju jekla: The article deals with the determination of the basic indicators of heat transfer in the continuous casting of steel, which can be described as an unsteady process with complicated boundary conditions for the solution. An analytical solution of this problem is practically impossible and, therefore, mathematical modelling is applied with a certain simplification of the real conditions and with a description of those criteria that influence the most the process of solidification and cooling. Using a simulation program and the knowledge of input parameters, it was possible to predict the distribution of the thermal field of a continuously cast blank in the course of its casting. Simulations also allowed us to deal with the issues of the inner structure, surface quality, mechanical properties of a continuously cast blank, metallurgical length, change in the thickness of a strand shell and overheating of steel. Some results obtained with numerical simulations are documented for concrete examples. Članek obravnava določanje osnovnih pokazateljev prenosa toplote pri kontinuirnem ulivanju jekla, ki se lahko opišejo kot nestabilen proces s kompliciranimi robnimi pogoji za rešitev. Analitska rešitev tega problema je praktično nemogoča, zato je bilo uporabljeno matematično modeliranje z nekaterimi poenostavitvami realnih pogojev in z opisom tistih meril, ki najbolj vplivajo na proces strjevanja in ohlajanja. S programom za simulacijo in poznanjem vhodnih parametrov je bilo mogoče predvideti razporeditev temperaturnega polja kontinuirno ulite gredice med njenim ulivanjem. Uporaba simulacije je omogočila opis notranje strukture, kvalitete površine, mehanskih lastnosti kontinuirno ulite gredice, metalurške dolžine, spreminjanja debeline strjene skorje in pregretja jekla. Nekateri rezultati, dobljeni z numerično simulacijo, so prikazani za konkretne primere.

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2002 Vezjak, Anton Vižintin, Jože http://rightsstatements.org/vocab/InC/1.0/ application/html application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-A3GZEUYK http://www.dlib.si/details/URN:NBN:SI:doc-A3GZEUYK slv Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Vpliv mazalnih razmer na tribološko vedenje materialov tesnilnih obročev v mehanskih drsnih tesnilih: The influence of lubricating conditions on the tribological behaviour of face materials in mechanical seals: The most important aspect of development of the mechanical seals is the tribological design of the seal faces. Tribological design involves, among other things, the selection of materials and defining the tribological characteristics of the sealing pair within the working limits. The performance of a mechanical face seal depends on many factors, of which lubrication has one of the most crucial roles. In this paper the influence of various lubricating conditions on different tribological parameters is analysed. Short-interval PV tests were performed on a computer-controlled test rig of our own design, where eight parameters were monitored online. Commercially available alumina, stainless steel and carbon-graphite were tested in tap water. The results show that for all material pairs, tribological parameters such as friction coefficient, the wear and the pressure-velocity limit are affected by lubricating conditions in the sealing dam. Glavni problem pri razvoju mehanskih tesnil je tribološka konstrukcija tesnilnih obročev, ki poleg ostalega zajema izbiro materialov in določitev triboloških lastnosti para tesnilnih obročev znotraj delovnega območja. Na samo obratovanje mehanskega drsnega tesnila vpliva več dejavnikov, izmed katerih je mazanje eden izmed najvplivnejših. T.i. PV-preskuse, smo izvedli na računalniško krmiljenem preskuševališču lastne konstrukcije, kjer smo med preskusom nadzorovali osem merilnih veličin. Kot preskusne materiale tesnilnih obročev smo uporabljali keramiko Al2O3, nerjavno jeklo in grafit, ki smo jih dvojili v različnih kombinacijah. Preskušali smo v vodi iz vodovodnega omrežja (pH~7). Rezultati so pokazali, da različne mazalne razmere v tesnilu, ki so večinoma odvisne od obratovalnih parametrov, bistveno vplivajo na vrednosti triboloških parametrov, kot so koeficient trenja, obraba in zgornja meja obratovanja. To velja za vse preskušane pare materialov.

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2015 Kucuk, Israfil Sarioglu, Cevat http://rightsstatements.org/vocab/InC/1.0/ application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-FJNWQX1C http://www.dlib.si/details/URN:NBN:SI:doc-FJNWQX1C eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Pitting corrosion of TiN-coated stainless steel in 3 % NaCl solution: Jamičasta korozija nerjavnega jekla s prevleko TiN v 3-odstotni raztopini NaCl:

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2013 Çelik, Erdal Cocen, Umit Ozdemir, Mehtap http://rightsstatements.org/vocab/InC/1.0/ application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-IIRCBGEC http://www.dlib.si/details/URN:NBN:SI:doc-IIRCBGEC eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Effect of viscosity on the production of alumina borate nanofibers via electrospinning: Vpliv viskoznosti na izdelavo aluminijevooksidnoboratnih nanovlaken z elektrospiningom: Alumina borate (Al18B4O33) nanofibers have been successfully fabricated with the electrospinning method using a solution that contains polyvinyl alcohol (PVA) and aluminium acetate stabilized with boric acid. The effect of the viscosity on the production of alumina borate nanofibers was investigated and the optimum parameters were determined to obtain the best fibers. DTA/TG analyses were performed to determine the heat-treatment regime. The morphology of the fibers was evaluated by SEM analyses, the phase structure of the fibers was obtained using XRD and the chemical bonding structure was determined by FTIR. On the whole, the results indicated that the viscosity of a solution is an important parameter for producing a homogeneous and thin fiber, while the calcination temperature has a significant effect on the phasestructure of the fibers. Aluminijevooksidnoboratna (Al18B4O33) nanovlakna so bila uspešno izdelana z elektrospining metodo z uporabo raztopine, ki vsebuje polivinil alkohol (PVA) in aluminijev acetat, stabiliziran z borovo kislino. Preiskovan je bil vpliv viskoznosti na izdelavo aluminijevooksidnoboratnih nanovlaken in določeni so bili optimalni parametri za pridobivanje najboljših vlaken. Za določitev režima toplotne obdelave so bile izvršene DTA/TG-analize. Morfologija vlaken je bila ocenjena s SEM-analizo, fazna struktura vlaken je bila dobljena z rentgensko difrakcijo (XRD), strukture kemijskih vezav pa so bile ugotovljene s FTIR. Rezultati so pokazali, da je viskoznost raztopine pomemben parameter za proizvodnjo homogenih in tankih vlaken, medtem ko ima temperatura kalcinacije pomemben vpliv na strukturo faz vlaken.

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2009 Sagbas, Aysun http://rightsstatements.org/vocab/InC/1.0/ application/html application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-KNQ0MRGZ http://www.dlib.si/details/URN:NBN:SI:doc-KNQ0MRGZ eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Improving the process capability of a turning operation by the application of statistical techniques: Izboljšanje procesa sposobnosti struženja z uporabo statistične tehnike: Process-capability indices are effective tools for the continuous improvement of quality, productivity and managerial decisions. Statistical process-control techniques improve the quality in mass production. In this study, a process-capability analysis was carried out in the machining line of a medium-sized company that produces machine and spare parts. For this purpose, normal probability plots and histograms were prepared and the process-capability indices Csubp and Csub{pk} were calculated. It is shown that the process capability for the whole process was inadequate and that the mass production was unstable. In order to satisfy the process-capability measures it is necessary to improve the quality level by shifting the process mean to the target value and reducing the variations in the process. Indeksi sposobnosti so za procese učinkovita orodja za stalno izboljševanje kakovosti, produktivnosti in vodstvenih odločitev. Statistična tehnika kontrole procesa omogoči izboljšanje kakovosti pri masovni proizvodnji. V tej študiji je bila izvršena ocena procesa za obdelovalno linijo srednje velike družbe, ki izdeluje stroje in rezervne dele. Za ta namen so bili pripravljeni histogrami normalne verjetnosti in izračunani indeksi sposobnosti procesa (Cspodajp in Cspodaj{pk}. Pokazalo se je, da je bila procesna sposobnost za celoten proces neprimerna in je zato bila nestalna masovna proizvodnja. Za izboljšanje stanjaje bilo treba sprejeti ukrepe za dvig nivoja kakovosti s premikom povprečja procesa na ciljno vrednost in znižati njegovo variabilnost.

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2011 Doliška, Aleš Kolar, Metod http://rightsstatements.org/vocab/InC/1.0/ application/html application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-M4H50U3O http://www.dlib.si/details/URN:NBN:SI:doc-M4H50U3O eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Tuning of poly(ethylene terephtalate)(PET)surface properties by oxygen plasma treatment: Prilagoditev lastnosti površine polietilen tereftalata (PET) z obdelavo v kisikovi plazmi: Modification of surface properties of poly(ethyleneterephtalate) (PET) thin films by treatment with weakly ionized oxygen plasma was studied by contact angles of water and diiodomethane (DIM) drops. Samples were exposed to oxygen plasma with the ion density of 5 x 1015/msup3 and the neutral oxygen atom density of 3 x 1021/msup3. Just after the treatment they were characterized by contact angle measurements. Results showed a quick decrease of the water contact angle in the first few seconds of plasma treatment, while prolonged treatment did not cause any substantiated modification. The contact angles of DIM, on the other hand, remained rather constant for the first several secondsof plasma treatment, and increased after prolonged treatment. It was found that the dispersion component of the surface free energy decreased with increasing treatment time, while the polar component increased with treatment time. The results were explained by surface functionalization as well as by roughness effects. Površinske lastnosti polimera polietilentereftalata (PET) smo prilagodili specifičnim zahtevam po visoki hidrofilnosti z obdelavo v kisikovi plazmi. Stopnjo hidrofilnosti smo določali iz meritev stičnih kotov dveh kapljevin, in sicer vode in dijodometana. Vzorce smo obdelovali v kisikovi plazmi z gostoto ionov 5 x 1015/mna3 in gostoto nevtralnih kisikovih atomov 3 x 1021/mna3. Meritve stičnih kotov kapljic smo opravili takoj po plazemski obdelavi. Rezultati so pokazali hiter padec stičnega kota vodnih kapljic že v prvih sekundah plazemske obdelave. Podaljšan čas obdelave ni prinesel bistvenih sprememb. Stični koti dijodometana so ostali praktično nespremenjeni po prvih nekaj sekundah, z nadaljnjo obdelavo pa so začeli padati. Ugotovili smo, da disperzijska komponenta površinske energije počasi pada s plazemsko obdelavo, medtem ko polarna komponenta raste. Rezultate smo pojasnili s površinsko funkcionalizacijo polimera in povečano hrapavostjo površine.

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2012 Manić, Miodrag Milutinović, Mladomir Movrin, Dejan Randjelović, Saša Trajanović, Miroslav http://rightsstatements.org/vocab/InC/1.0/ application/html application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-IQXUQBXK http://www.dlib.si/details/URN:NBN:SI:doc-IQXUQBXK eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article The impact of die angle on tool loading in the process of cold extruding steel: Vpliv kota matrice na obremenitev orodja pri hladni ekstruziji jekla: This paper presents an analysis of tool loading in the technology of the cold forward extrusion of steel. In the process of plastic deformation it is necessary to know the contact stress as a prerequisite for a more accurate analysis of the stress and strain on the internal structure of the continuum. In this way, accurate boundary conditions at the contact surfaces are obtained for the achieved conditions of deformation, which represent the starting values for generating numerical approximations of the plasticity parameter changes within the deformable volume. In the process of the forward extrusion of steel the workpiece material is exposed to all-round pressure during the entire process. Due to the high surface pressure at the head of the punch and the solid walls of the die, the material flows in the direction of the opening of the exchangeable conical surfaces of the die. During the extrusion process, the greatest resistance occurs in the direction of the axis displacement, i.e., the head punch, while the walls of the tools suffer considerably smaller loads. However, this has crucial importance for the accuracy and the quality of the finished part. V članku je opisana analiza obremenitve orodja pri hladni ekstruziji jekla v smeri naprej. Pri procesu plastične deformacije je treba poznati kontaktno napetost, ki je prvi pogoj za bolj natančno analizo napetosti in deformacije na notranjo strukturo kontinuuma. Tako je mogoče doseči natančne mejne razmere na kontaktnih površinah pri določenih pogojih deformacije, ki so začetne vrednosti za generiranje numeričnih približkov spremembe parametrov plastičnosti v deformabilnem volumnu. Pri ekstruziji materiala v smeri naprej je prešanec med celotnim procesom izpostavljen okolišnjemu pritisku. Zaradi visokega površinskega pritiska na čela trna in trdne stene valjastega orodja material teče v smeri premika osi, torej čela trna, medtem ko je obremenitev stene orodja mnogo manjša, vendar je zelo pomembna za natančnost in kakovost iztiskanca.

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2016 Kurşun, Ali Topal, Ersin http://rightsstatements.org/vocab/InC/1.0/ application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-7ERS9SSU http://www.dlib.si/details/URN:NBN:SI:doc-7ERS9SSU eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Investigation of hole effects on the critical buckling load of laminated composite plates: Preiskava vpliva luknje na kritično upogibno obremenitev laminiranih kompozitnih plošč:

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2013 http://rightsstatements.org/vocab/InC/1.0/ application/pdf text/plain application/xml info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-7RDU9TTF http://www.dlib.si/details/URN:NBN:SI:doc-7RDU9TTF slv Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/contributionToPeriodical Materiali in tehnologije:

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2013 Govekar, Edvard Grabec, Igor Kokalj, Tadej http://rightsstatements.org/vocab/InC/1.0/ application/html application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-ERA0M0BY http://www.dlib.si/details/URN:NBN:SI:doc-ERA0M0BY eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Modelling and optimization of a laser droplet-formation process: Modeliranje in optimizacija laserskega tvorjenja kapljice: The laser droplet-formation process (LDFP) is a part of the novel joining technology for forming high-temperature joints. The advantages of this technology are: good heat-input control, good control of the added material and limited local heating. A molten metal droplet is used as the basic unit for the filling material, and a determination of the process parameters for the formation of droplets with desired properties is crucial. A physical and numerical model of the process was built to allow a theoretical determination of the process parameters. The numerical model enables a simulation of the process at different sets of parameters and a genetic algorithm optimization was implemented to find the best set. To verify this general procedure for determination and optimization of the parameters, we applied it in a specific case of a nickel wire. On the basis of the numerical model of the process, laser pulses for pendant-droplet formation and droplet detachment were determined and applied in experiments. With numerically determined laser pulses pendant-droplet formation and detachment were accomplished. In most cases, the process showed a very high repeatability. The encouraging experimental verification shows that a numerical approach is a very helpful tool for a determination of the process parameters and a better understanding of the process. It significantly reduces the number of necessary experiments when the laser droplet-formation setup or the target droplet properties are changed. Proces laserskega tvorjenja kapljice (LTK) je del nove tehnologije spajanja za tvorjenje visokotemperaturnih spojev. Prednosti te tehnologije so: dobra kontrola vnesene toplote in dodanega materiala ter omejeno lokalno segrevanje podlage. Staljena kovinska kapljica se uporabi kot dodajni material, parametri za tvorjenje kapljice s primernimi lastnostmi pa so bistveni za uspešnost procesa. Zgradili smo fizikalni in numerični model procesa, ki omogoča teoretično določitev optimalnih procesnih parametrov. Numerični model nam omogoča simulacijo procesa pri različnih naborih parametrov, optimizacijo z genetskimi algoritmi pa smo uporabili za iskanje najboljšega nabora. Za eksperimentalno potrditev tega splošnega načina smo metodo uporabili v konkretnem primeru nikljeve žice. Na osnovi teoretičnega modela smo določili laserski blisk za tvorjenje in odlet kapljic ter jih uporabili v poskusih. Z numerično določenimi laserskimi bliski smo uspešno tvorili in ločili kapljico od žice. V večini primerov je proces izredno dobro ponovljiv. Uspešna eksperimentalna potrditev potrjuje pomembnost teoretičnega modela za določitev procesnih parametrov in boljše razumevanje procesa. Numerični model močno zmanjša potrebno število eksperimentov za določitev procesnih parametrov ob spremembi vrste žice ali spremembi ciljnih lastnosti tvorjenih kapljic.

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2012 Charvat, Pavel Klimes, Lubomir Ostry, Milan http://rightsstatements.org/vocab/InC/1.0/ application/html application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-DKNNC0HQ http://www.dlib.si/details/URN:NBN:SI:doc-DKNNC0HQ eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Challenges in the computer modeling of phase change materials: Izzivi v računalniškem modeliranju materialov s fazno spremembo: Phase-change materials (PCMs) are a well-established category of materials with many possible applications, ranging from the stabilization of temperature to heat or cold storage. The main principle of PCMs is the utilization of the latent heat of a phase change for energy storage. Though many pure chemical elements can be used as PCMs, a PCM very often consists of a number of substances. The main reason for creating a PCM as a mixture of various substances is to achieve a desirable melting temperature for a particular application. However, these mixed PCMs require accurate and reliable methods for determining their physical properties, since for numerical modeling the thermal properties of materials and their proper determination represent a significant issue that considerably affects the accuracy and credibility of numerical simulations and their outcomes. The thermal properties of PCMs are usually obtained by differential scanning calorimetry (DSC), based on temperature and heat measurements of the investigated and reference materials. There are several approaches to modeling materials with phase changes. In this paper, the focus is on the enthalpy approach and the effective heat capacity method. Both techniques, which utilize the results from a particular DSC measurement, allow a treatment with the latent heat, and as a result the desired heat or cold storage may be effectively simulated. The presented methods were implemented using the results from DSC measurements in order to simulate a solar air collector with a PCM. The obtained results are presented and discussed. The paper also concerns the problems associated with the uncertainty of material properties and their influence on numerical simulations. Materiali s faznimi premenami (PCM) so uveljavljena kategorija materialov z mnogimi področji uporabe: od stabilizacije temperature do shranjevanja toplote ali hladu. Glavni princip PMS je uporaba latentne toplote pri fazni premeni za shranjevanje energije. Čeprav je mogoče uporabiti kot PCM mnoge čiste kemijske elemente, se pogosto uporablja mešanica različnih elementov. Glavni razlog za uporabo mešanice za PCM je zagotavljanje želene temperature tališča za določen namen. Vendar pa mešanica PCM-ov zahteva natančne in izvedljive metode za določanje fizikalnih lastnosti. Numerično modeliranje termičnih lastnosti materialov zahteva zanesljivo določene termične lastnosti, kar bistveno vpliva na natančnost in zanesljivost simulacij in njihovih rezultatov. Termične lastnosti PCM-materialov navadno določamo z DSC-metodo, ki temelji na merjenju temperature in toplote preiskovanega in referenčnega materiala. Obstaja več načinov, kako modelirati materiale s faznimi premenami. V tem članku je glavna pozornost posvečena entalpijskemu približku in metodi efektivne toplotne kapacitete. Obe tehniki, ki uporabljata rezultate DSC-meritev, omogočata uporabo latentne toplote, kar omogoča učinkovito simuliranje shranjevanja toplote ali hladu. Predstavljeni metodi sta bili uporabljeni z uporabo rezultatov iz DSC-meritev za simulacijo sončnega kolektorja s PCM-materiali. Predstavljeni so rezultati z diskusijo. Članek obravnava tudi problem nezanesljivosti podatkov o lastnostih materialovin njihov vpliv na numerično simulacijo.

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2017 Černý, Robert Fořt, Jan Pavlík, Zbyšek Pavlíkova, Milena Trník, Anton http://rightsstatements.org/vocab/InC/1.0/ application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-C2U4SR4H http://www.dlib.si/details/URN:NBN:SI:doc-C2U4SR4H eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Effect of the mode and dynamics of thermal processes on DSC-acquired phase-change temperature and latent heat of different kinds of PCM: Ugotavljanje vplivov vrste in dinamike termičnih procesov na različne PCM-materiale s pomočjo diferencialne vrstične kalorimetrije (DSC):

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2015 Mramor, Katarina Šarler, Božidar Vertnik, Robert http://rightsstatements.org/vocab/InC/1.0/ application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-N7EEIW59 http://www.dlib.si/details/URN:NBN:SI:doc-N7EEIW59 eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article A meshless model of electromagnetic braking for the continuous casting of steel: Brezmrežni model elektromagnetnega zaviranja pri kontinuiranem ulivanju jekla:

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2017 Černý, Vít Drochytka, Rostislav Melichar, Jindřich http://rightsstatements.org/vocab/InC/1.0/ application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-MYOLQ8RB http://www.dlib.si/details/URN:NBN:SI:doc-MYOLQ8RB eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Examination methods for waterproofing injection screens in various building materials: Preiskovalne metode za vbrizgane hidroizolacijske membrane v različnih gradbenih materialih:

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2012 Kavička, František Klimeš, Lubomír Mauder, Tomáš Štětina, Josef http://rightsstatements.org/vocab/InC/1.0/ application/html application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-LBMCXDFH http://www.dlib.si/details/URN:NBN:SI:doc-LBMCXDFH eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Final-structure prediction of continuously cast billets: Napoved končne mikrostrukture kontinuirno ulitih gredic: In steel production, controlling and monitoring quality, grade and structure of final steel products are very important issues. It has been shown that the temperature distribution, the magnitude of temperature gradients, as well as the cooling strategy during the continuous steel casting have a significant impact on material properties, the structure and any defect formation of cast products. The paper describes an accurate computational tool intended for investigating the transient phenomena in continuously cast billets, for developing the caster control techniques and also for determining the optimum cooling strategy in order to meet all quality requirements. The numerical model of the temperature field is based on the finite-difference implementation of the 3D energy-balance equation using the enthalpy approach. This allows us to analyse the temperature field along the entire cast billet. Since the steel billets are produced constantly 24 hours per day, the transient temperature field is being computed in a non-stop trial run. It enables us to monitor and investigate the formation of the temperature field in real time within the mould, as well as the secondary and tertiary cooling zones, where the observed information can be immediately utilized for the caster-control optimization with respect to the whole machine or just an individual part. The application of the presented model is demonstrated with two examples including the steelworks in Toinec, Czech Republic, and in Podbrezová, Slovakia. To consider different operational conditions, the influences of the secondary-cooling setting on the surface and the inner defects formation, and on the final structure of the 150 x 150 mm billet are also discussed. Pri proizvodnji jekla je pomembno izvajanje kontrole kvalitete, vrste in mikrostrukture končnih proizvodov. Prikazano je, da ima razporeditev temperature, razpon temperaturnega gradienta, kot tudi strategija ohlajanja med kontinuirnim ulivanjem pomemben vpliv na lastnosti materiala, mikrostrukturo in možnost nastanka napak v litem proizvodu. V članku je predstavljeno natančno računalniško orodje za preiskave prehodnih pojavov v kontinuirno uliti gredici. Orodje je namenjeno razvoju kontrolne tehnike in tudi za določanje optimalne strategije ohlajanja za doseganje zahtevane kakovosti. Numerični model temperaturnega polja temelji na uporabi končnih diferenc 3D-enačbe energijskega ravnotežja z uporabo entalpije. Omogoča analizo temperaturnega polja vzdolž celotne lite gredice. Ker je proizvodnja gredic stalna, 24 ur na dan, je bilo prehodno temperaturno polje izračunano za neprekinjeno preskusno obratovanje. Omogočena je kontrola in preiskava nastanka temperaturnega polja v realnem času v kokili, v sekundarni in terciarni hladilni coni. Ugotovljena informacija se lahko neposredno uporabi za optimiranje celotne livne naprave ali pa samo posameznega dela. Uporaba predlaganega modela je prikazana za dva primera iz železarne Třinec na Češkem in železarne Podbrezová na Slovaškem. Prikazan je tudi vpliv nastavitve sekundarnega ohlajanja na nastanek površinskih in notranjih napak na gredici 150 mm x 150 mm pri različnih obratovalnih razmerah.

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2015 Donik, Črtomir Glodež, Srečko Godec, Matjaž Javornik, Nada Paulin, Irena Ratej, Milan Šori, Marko Šuštaršič, Borivoj http://rightsstatements.org/vocab/InC/1.0/ application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-8EVHQDBW http://www.dlib.si/details/URN:NBN:SI:doc-8EVHQDBW eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article The influence of the morphology of iron powder particles on their compaction in an automatic die: Vpliv morfologije delcev železovega prahu na njegovo sposobnost za avtomatsko enoosno stiskanje:

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2015 Aleksandrović, Srbislav Krstić, Božidar Lazić, Vukić Milosavljević, Dragan Mutavdžić, Milan Nikolić, Ružica R. Sedmak, Aleksandar http://rightsstatements.org/vocab/InC/1.0/ application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-L3DOCE7P http://www.dlib.si/details/URN:NBN:SI:doc-L3DOCE7P eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Selection of the most appropriate welding technology for hardfacing of bucket teeth: Izbira najbolj primerne tehnologije trdega navarjanja zoba zajemalke:

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2015 Sarikaya, Murat http://rightsstatements.org/vocab/InC/1.0/ application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-HPNBXK59 http://www.dlib.si/details/URN:NBN:SI:doc-HPNBXK59 eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Optimization of the surface roughness by applying the Taguchi technique for the turning of stainless steel under cooling conditions: Uporaba Taguchi-jeve metode za optimiranje hrapavosti površine pri struženju nerjavnega jekla z ohlajanjem:

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2017 Dvorský, Drahomír Kubásek, Jiří Vojtěch, Dalibor http://rightsstatements.org/vocab/InC/1.0/ application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-HTGQFFN1 http://www.dlib.si/details/URN:NBN:SI:doc-HTGQFFN1 eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article The effect of thermo-mechanical processing on the structure, static mechanical properties and fatigue behaviour of pure Mg: Vpliv termomehanske predelave čistega magnezija na strukturo, statične mehanske lastnosti in obnašanje pri utrujanju:

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2015 Falkus, Jan Miłkowska-Piszczek, Katarzyna http://rightsstatements.org/vocab/InC/1.0/ application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-E8PFCZMJ http://www.dlib.si/details/URN:NBN:SI:doc-E8PFCZMJ eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Developing continuous-casting-process control based on advanced mathematical modelling: Uporaba naprednega matematičnega modeliranja za razvoj kontrole postopka kontinuirnega ulivanja:

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2003 Erjavec, Bojan Irmančnik-Belič, Lidija Jenko, Monika http://rightsstatements.org/vocab/InC/1.0/ application/html application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-FLDL1CQM http://www.dlib.si/details/URN:NBN:SI:doc-FLDL1CQM slv Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Kovinsko mehko spajkanje v ultravisokem vakuumu pri serijskem procesiranju kanalnih fotopomnoževalk: Ultrahigh vacuum metal soldering at the batch processing of channel photomultipliers: Kovinsko mehko spajkanje steklenih katodnih podsklopov, ki vsebujejo vakuumsko naparjeno fotokatodno plast, s steklenimi anodnimi podklopi, ki vsebujejo kondicionirano kanalno elektronsko pomnoževalko s kolektorjem, z uporabo tekočih indijevih zlitin je zadnja pomembna faza vakuumske transferne tehnike. Ekstremna vakuumska tesnost mehko spajkanih spojev je poleg trdnosti in odpornosti proti temperaturnemu cikliranju izrednega pomena za pravilno delovanje in trajnostno dobo kanalnih fotopomnoževalk. Le-te se odlikujejo z visoko občutljivostjo in ekstremno nizkim ozadjem. Spojne površine steklenih podsklopov so metalizirane z vakuumsko naparjeno plastjo Cu ali Ni debeline do 0,5 mim. Pod in na to osnovo metalizacijsko plast sta naparjeni tanka vezna plast Cr in tanka zaščitna plast Au. Kot spajka je v obliki obročkov debeline do 0,7 mm uporabljena indijeva evtektična zlitina InBi ali InSn s tališčem 72 kompozitumC oziroma 118 kompozitumC. Po večurnem vakuumskem pregrevanju pri 360 kompozitumC in nekajminutnem mehanskem mešanju tekočih spajk pri 150 kompozitumC sledi pri temperaturah spajkanja spajanje anodnega in katodnega podsklopa. Z uporabo HRAES je bila preiskana sestava površine indijevih spajk pred spajkanjem na anodnem podsklopu in sestava površine metalizacijske plasti (raztapljanje Au, površinska segregacija Cr) nakatodnem podsklopu. Po spajkanju in po opravljenem preskusu trdnosti mehko spajkanih spojev sta bili s SEM in HRAES preiskani prelomni površini ob obeh podsklopih: omočenost in sestava metalizacijske plasti po vakuumskem pregrevanju, mehanskem mešanju in spajkanju, segregacija in nastanek intermetalnih spojin.

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2016 Dvořák, Petr Kubatík, Tomáš Marek, Ivo Michalcová, Alena Novák, Pavel Svobodová, Petra Vojtěch, Dalibor http://rightsstatements.org/vocab/InC/1.0/ application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-L1BOOVM3 http://www.dlib.si/details/URN:NBN:SI:doc-L1BOOVM3 eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article NiAl intermetallic prepared with reactive sintering and subsequent powder-metallurgical plasma-sintering compaction: Reakcijsko sintranje in zgoščevanje s plazemskim sintranjem NiAl intermetalne zlitine:

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2012 Balci, Erhan Camuşcu, Necip Sarikan, Bertan Űbeyli, Mustafa http://rightsstatements.org/vocab/InC/1.0/ application/html application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-DVRNLMJN http://www.dlib.si/details/URN:NBN:SI:doc-DVRNLMJN eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Investigation on the aging behaviour of the functionally gradient material consisting of boron carbide and an aluminum alloy: Raziskava ponašanja pri staranju funkcionalnih gradientnih materialov iz borovega karbida in aluminijeve zlitine: In the current study the effect of different temperatures on the aging behaviour of a functionally gradient material was investigated to observe the variation of hardness with respect to the aging time. To do this, the functionally-gradient-material (FGM) specimens, containing boron carbide and aluminum alloy, were produced with hot pressing. Three different layers were used in the FGM samples. Then the macro and micro examinations were carried out to observe the interface between the layers, the porosity, the grain size and probable cracks in these samples. After that the specimens were solutionized at 470 °C for 1 h. Next, the artificial aging at 100 °C, 120 °C and 150 °C was applied to the FGM specimens for 96 h. During the aging treatment, the Brinell hardness measurements were made on the samples at certain intervals. Moreover, three-point bending tests were also carried out to clarify the influence of the aging treatment on the strength of the FGM. Experimental results indicated that the highest hardness values were obtained at 120 °C after the aging period of 48-65 h. The aged specimens exhibited higher bending strength than the solutionized specimens. V tej študiji je prikazan vpliv različnih temperatur na staranje funkcionalnega gradientnega materiala in spreminjanje trdote v odvisnosti od časa staranja. Vzorci funkcionalno gradientnih materialov (FGM), ki vsebujejo borov karbid in aluminijevo zlitino, so bili izdelani s stiskanjem v vročem. Trije različni sloji so bili uporabljeni za FGM-vzorce. Na vzorcih so bile izvršene makro- in mikropreiskave stikov med sloji, določene so bile poroznost, velikost zrn in prisotnost morebitnih razpok. Potem so bili vzorci 1 h raztopno žarjeni na 470 °C, nato pa umetno starani 96 h na temperaturah 100 °C, 120 °C in 150 °C. Med postopkom staranja so bile v določenih intervalih izvršene meritve trdote po Brinellu. Dodatno je bil izvršen še tritočkovni upogibni preizkus, da bi opredelili vpliv staranja na trdnost FGM. Rezultati preizkusov kažejo, da je bila dosežena najvišja trdnost pri staranju med 48 h in 65 h na temperaturi 120 °C. Starani vzorci so pokazali večjo upogibno trdnost kot raztopno žarjeni vzorci.

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2015 Skołek, Emilia Świątnicki, Wiesław A. Wasiak, Krzysztof http://rightsstatements.org/vocab/InC/1.0/ application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-4JMC8F9N http://www.dlib.si/details/URN:NBN:SI:doc-4JMC8F9N eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Structure and properties of the carburised surface layer on 35CrSiMn5-5-4 steel after nanostructurization treatment: Struktura in lastnosti naogljičene površine jekla 35CrSiMn5-5-4 po nanostrukturni obdelavi:

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2015 Jirková, Hana Khalaj, Omid Mašek, Bohuslav Ronešová, Andrea Svoboda, Jiří http://rightsstatements.org/vocab/InC/1.0/ application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-I5ZUTWRX http://www.dlib.si/details/URN:NBN:SI:doc-I5ZUTWRX eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Investigation on new creep- and oxidation-resistant materials: Preiskava novega materiala, odpornega proti lezenju in oksidaciji:

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2014 Bouguettoucha, Abdallah Haddaoui, Nacerddine Ibos, Laurent Rouabah, Farid http://rightsstatements.org/vocab/InC/1.0/ application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-MHL4PK8Y http://www.dlib.si/details/URN:NBN:SI:doc-MHL4PK8Y eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Effect of the quenching temperature on the Izod impact strength of polycarbonate: eksperimentalni podatki in empirično modeliranje: experimental data and empirical modeling: Vpliv temperature kaljenja na Izod udarno trdnost polikarbonata: In this study, the development of a mathematical model of the effects of free quenching on the Izod impact strength of polycarbonate (PC) has been investigated. Three different thermal treatments were used: the first quenching from the melt state to different temperatures, the second quenching from Tg + 15 °C and, finally, the annealing. The results have shown that an improvement in the impact strength can be obtained after the second quenching at 40 °C. The impact tests experimentally performed on the molding prototypes yield useful data for a particular structural and impact-loading case. But, it is generally not practical, in terms of time and cost, to experimentally characterize the effects of a wide range of design variables. A successful numerical model for the Izod impact strength of polymers can provide convenient and useful guidelines on product design and, therefore, decrease the disadvantages arising from purely experimental trial and error. It is expensive to prepare the samples for the tests. Therefore, it is necessary to develop a mathematical model that will predict the fracture toughness of polycarbonate as a function of the quenching temperature. Mathematical models for the mechanical properties like the tensile strength, Young%s modulus and Izod impact strength as functions of the quenching temperature are not available. There is no sign that they can be built up from a simple theory; a polynomial interpolation was, therefore, used to generate a fracture-toughness model using the data obtained from the experiments. The shifted model represents the Izod impact of the samples as a function of the first- and second-quenching temperatures. Ta študija preučuje razvoj matematičnega modela vpliva prostega kaljenja na Izod udarno trdnost polikarbonata (PC). Uporabljeni so bili trije različni načini toplotne obdelave: najprej prosto kaljenje iz staljenega stanja na različne temperature, nato drugo kaljenje iz Tg + 15 °C in nato končno žarjenje. Rezultati so pokazali, da je mogoče doseči izboljšanje Izod udarne trdnosti po drugem kaljenju pri 40 °C. Eksperimentalno izvedeni preizkusi na modeliranih prototipih so dali uporabne podatke za posebne primere strukturno in udarno obremenjenih primerov. Vendar pa na splošno ni praktično % s stališča časa in stroškov % eksperimentalno določanje vplivov različnih oblik. Uspešen numerični model za Izod udarno trdnost polimerov lahko zagotovi zanesljive in uporabne napotke za načrtovanje proizvodov in s tem zmanjša pomanjkljivosti, ki izvirajo iz eksperimentalnih preizkusov in napak. Priprava vzorcev za preizkuse je draga. Zato je treba razviti matematični model, ki bo napovedoval lomno žilavost polikarbonata v odvisnosti od temperature kaljenja. Na razpolago ni modelov za mehanske lastnosti, kot so natezna trdnost, Youngov modul in Izod udarna trdnost, v odvisnosti od temperature kaljenja. Ni znamenj, da se lahko postavijo z enostavno teorijo: zato je bila z uporabo eksperimentalnih podatkov uporabljena interpolacija polinomov za izdelavo modela lomne žilavosti. Predstavljeni model predstavlja Izod udarno trdnost v odvisnosti od prve in druge temperature kaljenja.

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2015 Čučnik, Saša Flašker, Ajda Iglič, Aleš Kos, Andrej Kulkarni, Mukta Vishwanath Mazare, Anca Mrak Poljšak, Katjuša Schmuki, Patrik Sodin-Šemrl, Snežna http://rightsstatements.org/vocab/InC/1.0/ application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-5P5SWDY9 http://www.dlib.si/details/URN:NBN:SI:doc-5P5SWDY9 eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Fabrication of TiOsub2 nanotubes for bioapplications: Izdelava TiOspodaj2-nanocevk za biomedicinsko uporabo:

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2003 Cvijović, Zorica Martinović, Momčilo Tripković, Snežana Vuksanović, Darko Živković, Petar http://rightsstatements.org/vocab/InC/1.0/ application/html application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-E99N4LLW http://www.dlib.si/details/URN:NBN:SI:doc-E99N4LLW eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article The characterisation! of Al-Si alloys in a thermally treated state: Karakterizacija zlitin Al-Si za uporabo pri povišani temperaturi:

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2016 Jirková, Hana Khalaj, Omid Kubina, Tomáš Mašek, Bohuslav Nový, Zbyšek Svoboda, Jiří Štádler, Ctibor http://rightsstatements.org/vocab/InC/1.0/ application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-7UWLTB8S http://www.dlib.si/details/URN:NBN:SI:doc-7UWLTB8S eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Behaviour of new ods alloys under single and multiple deformation: Obnašanje novih ODS zlitin pri enojni in večkratni deformaciji:

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2014 http://rightsstatements.org/vocab/InC/1.0/ application/pdf text/plain application/xml info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-BBSIOSPY http://www.dlib.si/details/URN:NBN:SI:doc-BBSIOSPY slv Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/contributionToPeriodical Materiali in tehnologije:

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2002 Erjavec, Bojan Irmančnik-Belič, Lidija Šetina, Janez http://rightsstatements.org/vocab/InC/1.0/ application/html application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-BZ5ZWI4L http://www.dlib.si/details/URN:NBN:SI:doc-BZ5ZWI4L slv Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Akreditacija laboratorija za metrologijo tlaka na Inštitutu za kovinske materiale in tehnologije:

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2016 Dufka, Ámos Melichar, Tomáš http://rightsstatements.org/vocab/InC/1.0/ application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-MX02KK33 http://www.dlib.si/details/URN:NBN:SI:doc-MX02KK33 eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Composites based on inorganic matrices for extreme exposure conditions: Kompoziti z anorgansko osnovo za izpostavitev ekstremnim razmeram:

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2011 Jenko, Monika Kevorkijan, Varužan Paulin, Irena Škapin, Srečo D. Šuštaršič, Borivoj http://rightsstatements.org/vocab/InC/1.0/ application/html application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-6MYQ03L1 http://www.dlib.si/details/URN:NBN:SI:doc-6MYQ03L1 eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Synthesis of aluminium foams by the powder-metallurgy process: compacting of precursors: Sinteza aluminijevih pen po postopku metalurgije prahov: stiskanje prekurzorjev: Aluminium foams, produced by the powder-metallurgy route, have a good potential for use in weight-sensitive structural parts. The goal of this study was to evaluate the properties and to optimize the preparation of precursors by a powder-compacting process. Various compacting pressures, from 200 MPa to 900 MPa, were used in the double-axial powder-compacting process for two different aluminium powders: pure aluminium and an AlSi12 alloy with the addition of 1 % of TiH2 as a foaming agent. The green density of the precursors and the distribution of the foaming agent were examined. The powder particles was also characterised. The results of the effective preparation of precursors are shown as the effectiveness of the foaming of the precursors. The relation between the powder characteristics, the aluminium-alloy properties and the preparation of precursors was studied by SEM/EDS analysis, powder-metallurgy standard testing of metallic powders, granulometry, etc. Different parameters were used for the precursor preparation and foaming. The foaming temperature varied between 680 °C and 770°C, and the foaming time was from 6 min to 13 min. The relation between the properties and the applied production parameters was studied in detail and is described in this paper. Aluminijeve pene, narejene po postopku metalurgije prahov, imajo velik potencial v uporabi lahkih konstrukcij. Cilj raziskave je ugotoviti lastnosti in parametre za optimizacijo priprave prekurzorja po postopku hladnega stiskanja. Za pripravo prekurzorjev smo uporabili obojestransko stiskanje s tlaki od 200 MPa do 900 MPa. Stiskali smo mešanico prahov tehnično čistega aluminija 99,7 % in zlitine AlSi12, v obeh primerih z dodatkom 1 % TiH2 kot penila. Določili smo zelene gostote in porazdelitev penila v prekurzorjih. Naredili smo tudi karakterizacijo vseh treh uporabljenih prahov kot vstopnega materiala. Rezultat uspešne priprave prekurzorjev se kaže v uspešnosti penjenja materiala. Povezavo med lastnostmi prahov, lastnostmi aluminijevih zlitin in priprave prekurzorjev smo raziskovali s SEM/EDS-analizami, s preizkušanjem prahov s standardnimi metodami, uveljavljenimi v metalurgiji prahov, granulometrijo itd. Uporabljeni so bili različni parametri za pripravo in penjenje prekurzorjev. Temperature penjenja so bile med 680 °C in 770 °C, čas penjenja pa med 6 min in 13 min. Povezava med lastnostmi in uporabljenimi parametri za pripravo aluminijevih pen je bila raziskana in je podrobno opisana v tem članku.

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2004 Črnko, Josip Lazić, Ladislav http://rightsstatements.org/vocab/InC/1.0/ application/html application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-7NS0D636 http://www.dlib.si/details/URN:NBN:SI:doc-7NS0D636 eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Finite-element thermal analysis of a new cooler design: A mathematical model of the cooling process of an octagonal cross-section steel semi-product was constructed on the basis of the finite-element analysis technique. The temperature variation throughout the structure causes thermal contraction stresses and deformations. Transient heat-conduction analyses and thermal stress analyses were performed to determine the allowable rate of cooling with regard to the temperature distribution within the structure and the stresses and deformations resulting from the variation of the heat-transfer coefficient of forced convection. Na osnovi metode končnih elementov je bil razvit matematični model procesa ohlajanja jeklenega polproizvoda z osmerokotnim prerezom. Sprememba temperature po prerezu povzroči termične krčilne napetosti in deformacije. Izvršene so bile analize toplotne prevodnosti in toplotnih napetosti z namenom, da se določi dopustna hitrost ohlajanja z upoštevanjem porazdelitve temperature po prerezu ter napetosti in deformacije zaradi spremembe koeficienta prenosa toplote pri prisiljeni konvekciji.

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2016 Azimi, Razieh Lakouraj, Moslem Mansour Rahpaima, Ghasem http://rightsstatements.org/vocab/InC/1.0/ application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-AN24FGX3 http://www.dlib.si/details/URN:NBN:SI:doc-AN24FGX3 eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Organosoluble xanthone-based polyimides: synthesis, characterization, antioxidant activity and heavy-metal sorption: Organsko topni poliamidi na osnovi ksantona: sinteza, karakterizacija, antioksidativna aktivnost in sorpcija težkih kovin:

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2017 Jinu, Gowtthanithankachi Raghuvaran Karthikeyan, Govindan http://rightsstatements.org/vocab/InC/1.0/ application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-KUXEC3J7 http://www.dlib.si/details/URN:NBN:SI:doc-KUXEC3J7 eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Tensile behaviour and fractography analyses of LM6/ZrOsub2 composites: Obnašanje in analiza pri natezni obremenitvi preloma kompozitov LM6/ZrOspodaj2:

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2011 Borković, Predrag Malešević, Milan Šuštaršič, Borivoj Vojvodič-Tuma, Jelena http://rightsstatements.org/vocab/InC/1.0/ application/html application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-JB85A3NR http://www.dlib.si/details/URN:NBN:SI:doc-JB85A3NR eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Prediction of the mechanical properties of cast Cr-Ni-Mo stainless steels with a two-phase microstructure: Napoved mehanskih lastnosti litih Cr-Ni-Mo nerjavnih jekel z dvofazno mikrostrukturo: The results of mechanical tests on Cr-Ni-Mo stainless steels were analyzed to find a correlation between the Charpy-V impact toughness (CVN), the Vickers hardness (HV5) and the tensile strength Rm with the time and temperature of isothermal ageing. These tests were performed on three alloys with different chemical compositions and delta ferrite contents. The alloys were designated as the volume fractions of A (2 %), B (11 %) and C (with 27 % of delta ferrite). All the results were then described with the most suitable function. After that, a computer program for the prediction (calculating) of the mechanical properties (impact toughness CVN, Vickers hardness HV5 and tensile strength Rm) was made. The program application was written in the Visual Basic 6 environment. With this program it is possible to predict the change of the CVN, HV5 and Rm of Cr-Ni-Mo stainless steels depending on time, aging temperature and the delta ferrite content of the material for aging temperatures from 290 °C to 350 °C (step 10 °C), and delta ferrite content from 2 % to 27 % (step 1 %). To avoid mistakes and to focus on a time period of practical importance, the aging time is limited to 40 years. The principle used here allows us to predict the mechanical properties of other materials with any other chemical composition. However, the confirmation of this requires additional experimental data. Na osnovi mehanskih preizkusov na Cr-Ni-Mo nerjavnem jeklu smo izvršili analizo vpliva temperature in časa izotermnega žarjenja na Charpy-V udarno žilavost (CVN), trdoto po Vikersu (HV5) in natezno trdnost (Rm). Mehanske preizkuse smo izvršili pri treh zlitinah z različno kemijsko sestavo in vsebnostjo delta ferita. Zlitine smo označili z volumenskimi deleži A (2 %), B (11 %) in C (27 % delta ferita). Vse eksperimentalne rezultate smo opisali z najbolj primerno empirično funkcijo. Potem smo izdelali računalniški program za napoved (izračun) mehanskih lasnosti (CVN, HV5 in Rm) v odvisnosti od časa in temperature izotermnega žarjenja (staranja). Programska aplikacija je napisana v okolju Visual Basic 6. S tem programom je mogoče predvideti spremembo CVN, HV5 in Rm Cr-Ni-Mo nerjavnega jekla, odvisno od časa, temperature staranja in vsebnosti delta ferita v materialu, za temperature staranja od 290 °C do 350 °C (korak 10 °C) in vsebnosti delta ferita od 2 % do 27 % (korak 1 %). Da bi se izognili napakam in se osredinili na časovno obdobje, ki ima praktični pomen, je čas omejen za obdobje 40 let. Z uporabo istega načela je tudi mogoče napovedati mehanske lastnosti drugih materialov z drugačno kemično sestavo. Za potrditev tega potrebujemo nove eksperimentalne podatke.

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2001 Godec, Matjaž Jenko, Monika Mandrino, Djordje Prešern, Vasilij Šuštaršič, Borivoj http://rightsstatements.org/vocab/InC/1.0/ application/html application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-8XBHVZFZ http://www.dlib.si/details/URN:NBN:SI:doc-8XBHVZFZ eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Development of Fe-Si-B powders for soft-magnetic application: Razvoj prahov na osnovi Fe-Si-B za mehkomagnetne materiale: Soft magnetic composite (SMC) materials based on Fe-Si-B powder have been developed. The most important property of SMC materials, especially those used in a high-frequency range, is that the soft-magnetic powder particles are well insulated from each other. The Fe-Si-B powders were prepared by water-atomisation and were compared with some commercially available powders. The surfaces of microcrystalline powders were investigated using high-resolution Auger-electron spectroscopy (HRAES) and X-ray photoelectron spectroscopy (XPS). The electrical break-down voltages, permeability and electrical losses of SMC materials were measured. Na osnovi prahu Fe-Si-B smo razvili mehkomagnetne kompozitne materiale. Če so namenjeni za uporabo v visokofrekvenčnem področju, morajo imeti zelo dobro izolacijo med posameznimi delci-prahovi. Prahove Fe-Si-B smo pripravili po postopku vodne atomizacije in jih primerjali z nekaterimi komercialnimi. Površine mikrokristaliničnih prahov smo preiskali z visoko ločljivim Augerjevim elektronskim spektrometrom (HR AES) in z rentgenskim fotoelektronskim spektrometrom (XPS). Izmerili smo tudi nekatere električne lastnosti mehkomagnetnih kompozitov, kot so: električna prebojna napetost, permeabilnost in električne izgube.

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2000 Anžel, Ivan Brunčko, Mihael http://rightsstatements.org/vocab/InC/1.0/ application/html application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-D4VS5XPT http://www.dlib.si/details/URN:NBN:SI:doc-D4VS5XPT slv Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Karakterizacija usmerjenega strjevanja zlitine Cu-Cr-Zr s kvantitativno mikrostrukturno analizo: Characterization of directional solidification in a Cu-Cr-Zr alloy with quantitative microstructural analysis: In this paper the results of our research on tahe possibilities for defining the influencing parameters that describe a directionally solidified microstructure using quantitative microstructural analysis are presented. The geometrical microstructural parameters (primary and secondary dendrite arm spacing and the eutectic volume fraction) were measured with different methods of quantitative analysis on samples of directionally solidified Cu-Cr-Zr alloy. The solidification parameteres were then calculated considering the relations between solidification and geometric microstructural parameters. The composition shows a good agreement between the calculated solidification parameters and the solidification parameters determined by experiment. V prispevku predstavljamo rezultate raziskovalnega dela, s katerim smo želeli preveriti možnosti določitve vplivnih parametrov pri usmerjenem strjevanju zlitin s kvantitativno analizo lite mikrostrukture. Pri vzorcih usmerjeno strjene zlitine Cu-Cr-Zr smo z različnimi metodami kvantitativne analize izmerili geometrijske parametre mikrostrukture (primarno in sekundarno dendritno razdaljo ter volumski delež evtektika) in ob upoštevanju analitičnih izrazov, ki podajajo razmerja med geometrijskimi parametri mikrostrukture ter parametri strjevanja, slednje tudi določili. Primerjava tako določenih parametrov strjevanja z eksperimentalno izmerjenimi vrednostmi je pokazala dobro ujemanje.

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2013 Dilmec, Murat Ozturk, Fahrettin Selcuk Halkaci, Huseyin Turkoz, Mevlut http://rightsstatements.org/vocab/InC/1.0/ application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-FJOLVTWM http://www.dlib.si/details/URN:NBN:SI:doc-FJOLVTWM eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Effect of sheet thickness on the anisotropy and thickness distribution for AA2024-T4: Vpliv debeline pločevine na anizotropijo in razporeditev debeline pri AA2024-T4: In this study, the effect of sheet thickness on the anisotropy and thickness distribution at room temperature (RT) was investigated for AA2024-T4 sheets. The anisotropy was determined using automated strain measurement with a grid analysis and profile-projector methods. The results indicate that the effects of the thicknesses of 0.8 mm, 1 mm, and 2 mm on the anisotropy were insignificant. In addition to the anisotropy measurement, the thickness variation of the specimens was also monitored. Besides the anisotropy values, no significant differences were observed between various thicknesses and directions. V tem delu je bil preiskovan vpliv debeline pločevine AA2024-T4 na anizotropijo in razporeditev debeline pri sobni temperaturi (RT). Anizotropija je bila ugotovljena z avtomatskim merjenjem raztezka z analizo mreže in metodo projiciranja profila. Rezultati kažejo, da je vpliv debeline 0,8 mm, 1 mm in 2 mm na anizotropijo zanemarljiv. Dodatno z meritvami anizotropije je bilo tudi spremljano spreminjanje debeline vzorcev. V primerjavi z vrednostmi anizotropije ni bilo opažene pomembne razlike pri različnih debelinah in smereh.

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2008 Laš, Vladislav Zemčík, Robert http://rightsstatements.org/vocab/InC/1.0/ application/html application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-15BO7TEP http://www.dlib.si/details/URN:NBN:SI:doc-15BO7TEP eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Numerical and experimental analyses of the delamination of cross-ply laminates: Numerična in eksperimentalna analiza delaminacije v križnih ploščatih laminatih:

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2014 Elango, Gopalakrishnan Palanikumar, Kayaroganam Raghunath, Busuna Kuppuswamy http://rightsstatements.org/vocab/InC/1.0/ application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-I8KARN06 http://www.dlib.si/details/URN:NBN:SI:doc-I8KARN06 eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Experimental analysis of the wear behavior of hybrid metal-matrix composites of LM25Al with equal volumes of SiC + TiO2: Analiza obrabe hibridnega kompozita s kovinsko osnovo LM25Al z enakim volumenskim deležem SiC + TiO2: In the present work tribological behavior of aluminium alloy LM25 reinforced with SiC and TiO2 fabricated with the stir-casting process is investigated. The wear resistance and frictional properties of the hybrid metal-matrix composite were studied by performing a dry-sliding-wear test using a pin-on-disc wear tester. The experiments were conducted at a constant sliding velocity of 1.04 m/s and sliding distance of 628 m with various loads of (3, 4, 5) kg and the particle volume fraction ranging from 5-15 %. The results show that the reinforcement of the metal matrix with SiC and TiO2 reduces the wear rate at room temperature. The results also indicate that the wear of the test specimens increases with the increasing load and sliding distance. The coefficient of friction decreases with the load and increasing volume content of the reinforcement. The hardness of the hybrid-composite test specimens increases with the increasing volume fraction of the particle reinforcement of SiC and TiO2. The microstructure analysis reveals that SiC and TiO2 particulates are uniformly distributed in the matrix. The wear surfaces are examined with a scanning electron microscope which indicates abrasive wear mechanism due to the hard ceramic particles on the worn surface. V tem delu je preiskovano tribološko vedenje aluminijeve zlitine LM25, ojačane s SiC in TiO2, izdelane po postopku vmešavanja v talino. Preizkušena je bila odpornost proti obrabi in lastnosti pri trenju hibridnega kompozita s kovinsko osnovo s suhim trenjem na napravi "pin-on-disc" za preizkušanje obrabe. Preizkusi so bili izvršeni pri konstantni hitrosti drsenja 1,04 m/s in poti drsenja 628 m pri različnih obremenitvah (3, 4 in 5) kg in pri volumenskem deležu delcev od 5-15 %. Rezultati kažejo, da ojačanje kovinske osnove z delci SiC in TiO2 zmanjšuje obrabo pri sobni temperaturi. Rezultati tudi kažejo, da se obraba povečuje z večanjem obremenitve in daljšanjem poti drsenja. Koeficient trenja se zmanjšuje z obremenitvijo in z večanjem volumenskega deleža delcev za ojačanje. Trdota vzorcev hibridnega kompozita narašča z naraščanjem volumenskega deleža delcev SiC in TiO2 za ojačanje. Pregled mikrostrukture je pokazal, da so delci SiC in TiO2 enakomerno razporejeni v osnovi. Preiskava obrabljenih površin z vrstičnim elektronskim mikroskopom pokaže, da gre za mehanizem abrazijske obrabe zaradi trdih delcev, ki so na obrabljeni površini.

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2001 Grešovnik, Ferdinand Hrnčič, Sonja Hrnčič, Vlado Ribič, Peter Veršnik, Franc Vodeb, Dušan http://rightsstatements.org/vocab/InC/1.0/ application/html application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-MM9KM901 http://www.dlib.si/details/URN:NBN:SI:doc-MM9KM901 slv Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Termomehanska obdelava zobatih vencev: A termo-mechanical heat treatment of starter ring gears: The program of starter ring gears is a highly specialized program for manufacture of rings and ring gears for automotive industry. The manufacture runs in technological phases which are today too expensive, while the process stability is still not within the limits as required by automotive industry. Introduction of high-temperature thermomechanical treatment (VTTMO) for gear rims improves their mechanical properties Rm, A, Rp0,2, and it simultaneously essentially reduces residual stresses. Further, we will try to establish the influence of steel microalloying elements upon a reduction of gear rim deformations. The major technological problem lies in deformations. In our research project we found the real cause of problems, technical and technological solution, and with a thermomechanical treatment and induction heating we reduced energy consumption, optimized technology for robotized production of 1,900.000 starter ring gears. Program zobatih vencev je visokospecializiran program za izdelavo obročev in zobatih vencev za avtomobilsko industrijo. Izdelava poteka po tehnoloških fazah, ki so v tem trenutku predrage, stabilnost procesa pa ni v mejah, ki jih zahteva avtomobilska industrija. Uvedba visokotemperaturne termomehanske obdelave (VTTMO) zobatih vencev izboljšuje mehanske lastnosti vencev Rm, A, Rp0.2, hkrati pa bistveno vpliva na znižanje zaostalih napetosti. V nadaljevanju naloge bomo skušali ugotoviti vpliv mikrolegiranosti jekla na povišanje mehanskih lastnosti in žilavosti ter vpliv legirnih elementov na zmanjševanje deformacij zobatih vencev. Največji tehnološki problem predstavljajo deformacije. Z raziskovalnim projektom smo odkrili pravi vzrok problemov, poiskali tehnično in tehnološko rešitev, s termomehansko obdelavo in indukcijskim ogrevanjem smo znižali energetsko porabo, optimizirali tehnologijo za robotizirano proizvodnjo 1.900.000 vencev.

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2015 Čapka, Alexander Fojtl, Ladislav Rusnák, Vladimír Rusnakova, Sona Zaludek, Milan http://rightsstatements.org/vocab/InC/1.0/ application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-MSJEX5ZP http://www.dlib.si/details/URN:NBN:SI:doc-MSJEX5ZP eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Flame resistence and mechanical properties of composites based on new advanced resin system FR4/12: Negorljivost in mehanske lastnosti kompozitov na osnovi naprednih sistemov smol FR4/12:

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2004 Knap, Matjaž Kugler, Goran Nzobandora, Celestin Palkowski, Heinz Terčelj, Milan Turk, Radomir http://rightsstatements.org/vocab/InC/1.0/ application/html application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-BPJQBWKY http://www.dlib.si/details/URN:NBN:SI:doc-BPJQBWKY slv Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Razvoj modela širjenja med toplim prostim kovanjem: The automatization of open-die forging technology is essential for cheaper production and better quality products. The current models for the prediction of spreading are too general and, consequently, not sufficiently accurate, which was confirmed by using Hot Forging Simulator software (HFS). The metods applied for the model development that include more influential parameters, are the following: the registration of parameters and measurements of workpiece spreading during the laboratory physical simulations; industrial measurements; the analysis of local material flow with the FE method; the treatment of measurement results and analysis with neuronal networks. Two models for the prediction of free spreading were proposed: prediction in the form of a function and prediction by applying neuronal networks. The accuracy of the predictions with both new models is much better than that with the current model. Avtomatizacija tehnologije toplega prostega kovanja je bistvenega pomena za izboljšanje gospodarnosti proizvodnje in kvalitete izdelkov, kovanih na hidravlični stiskalnici. Dosedanji modeli napovedovanja prostega širjenja so za ta namen presplošni in premalo natančni, kar je bilo potrjeno tudi z njihovo uporabo v programu za simulacijo toplega prostega kovanja HFS (Hot Forging Simulator). Pri razvoju novega modela, ki upošteva večje število vplivnih parametrov, so bili uporabljeni naslednji postopki: spremljanje parametrov in merjenje širjenja vzorcev med fizikalnim simuliranjem v laboratoriju; meritve parametrov kovanja v industriji; analiza lokalnega toka materiala z metodo končnih elementov in obdelava rezultatov meritev in analiz z nevronskimi mrežami. Za napovedovanje prostega širjenja sta bila uporabljena dva načina: funkcijski zapis in napovedovanje z uporabo nevronskih mrež. Natančnost napovedovanja z obema modeloma je veliko večja kot pri sedaj uporabljenem modelu.

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2013 Bošković, Ivana Ivanović, Mileta Krgović, Milun Turović, Danka Vukčević, Mira Zejak, Radomir http://rightsstatements.org/vocab/InC/1.0/ application/html application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-DIBXCQVR http://www.dlib.si/details/URN:NBN:SI:doc-DIBXCQVR eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Utilization of geopolymerization for obtaining construction materials based on red mud: Uporaba geopolimerizacije za pridobivanje gradbenega materiala na osnovi rdečega blata: In this study the geopolymerization process for obtaining construction materials based on red mud was used. The aim of this study was to define the most favorable conditions enabling the utilization of the geopolymerization process in the production of construction materials based on red mud as a by-product of alumina production. For this purpose, the physicochemical and mechanical properties of the obtained construction (geopolymers) materials were tested. On the basis of the results the optimal conditions for geopolymerization and the effect of the main synthesis parameters were determined with repect to the satisfactory mechanical and other properties of the obtained materials. The inorganic polymeric materials produced by the geopolymerization of red mud developed satisfactory compressive strength, which leads to the conclusion that these materials may be used in the sector of construction materials. V tej študiji je bil uporabljen postopek geopolimerizacije za pridobivanje gradbenega materiala na osnovi rdečega blata. Namen študije je bil opredeliti najugodnejše razmere, ki bi omogočile uporabo geopolimerizacijskega postopka za pridobivanje gradbenega materiala na osnovi rdečega blata, ki je stranski proizvod pri proizvodnji aluminija. Za ta namen so bile preizkušene fizikalno-kemijske in mehanske lastnosti materiala (geopolimera). Na osnovi dobljenih rezultatov so bile določene optimalne razmere za geopolimerizacijo in učinki glavnih parametrov sinteze s stališča zadovoljivih mehanskih in drugih lastnosti. Anorganski polimerni material, izdelan z geopolimerizacijo rdečega blata, je imel zadovoljivo tlačno trdnost, kar omogoča sklep, da bi bil ta material uporaben kot gradbeni material.

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2015 Kucuk, Israfil Sarioglu, Cevat http://rightsstatements.org/vocab/InC/1.0/ application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-EH3EEAPC http://www.dlib.si/details/URN:NBN:SI:doc-EH3EEAPC eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Corrosion of CrN-coated stainless steel in a NaCl solution (w =3%): Korozija nerjavnega jekla s CrN-prevleko v raztopini NaCl (w =3%):

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2014 Crnojević-Bengin, Vesna Đokić, Miloje Hladnik, Aleš Kavčič, Urška Mladenovič, Vladan Muck, Tadeja Pleteršek, Anton Radonić, Vasa http://rightsstatements.org/vocab/InC/1.0/ application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-KSZSUMFJ http://www.dlib.si/details/URN:NBN:SI:doc-KSZSUMFJ eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article The influence of lamination and conductive printing inks on smart-card operability: Vpliv laminacije in prevodnih tiskarskih barv na delovanje pametnih kartic:

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2015 Adámková, Eliška Beňo, Jaroslav Jelínek, Petr Mikšovský, František http://rightsstatements.org/vocab/InC/1.0/ application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-7C8C0MTD http://www.dlib.si/details/URN:NBN:SI:doc-7C8C0MTD eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Development of composite salt cores for foundry applications: Razvoj kompozitnih slanih jeder za uporabo v livarstvu:

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2010 Mandziej, S. T. http://rightsstatements.org/vocab/InC/1.0/ application/html application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-BDY7LE0O http://www.dlib.si/details/URN:NBN:SI:doc-BDY7LE0O eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Physical simulation of metallurgical processes: Fizikalna simulacija metalurških procesov: Worldwide demand of better and more efficient metallurgical processes, leading to low costs of their products, stimulates intensive research to reach these goals. In this respect, any full-scale industrial experiments appear non-acceptable. Cutting off the R&D costs and fast introducing of new technologies is possible when physical and numerical simulations are used. The computer simulation can be only correct when exact data of materials behaviour at processing conditions are known. To obtain the data, physical simulation is needed and it must be executed on multi-purpose thermal-mechanical testing devices accurately reproducing the real industrial processing conditions. For continuous casting or metal forming, individual phases of processes or multi-step operations must be followed, characterized by their time, temperature, and by applied forces, strains and strain rates. Actually the physical simulation, as compared with full-scale industrial testing, allows in a fraction of time for a fraction of cost an improvement of existing technology or development of a new one for modern materials and products. It can be used for solving production problems due to solidification phenomena or deformability limits, which result in hot cracking and rejection of the product. In this paper several examples of physically simulated procedures are given and their physical background discussed. Rast zahtev po boljših in bolj učinkovitih metalurških procesih stimulira po vsem svetu intenzivne raziskave, kako doseči te cilje, ker so za tak namen nesprejemljivi realni industrijski poizkusi. Zmanjšanje RR-stroškov in hitro uvedbo novih tehnologij dosežemo, če uporabimo fizikalno in numerično simulacijo procesov. Računalniška simulacija je natančna, če uporablja prave podatke o vedenju materiala v procesnih razmerah. Da bi te podatke pridobili, je potrebna fizikalna simulacija, ki se izvrši na večnamenski termomehanični preizkusni napravi, ki natančno reproducira pogoje realnega industrijskega procesiranja. Za neprekinjeno litje in oblikovanje kovin je treba upoštevati različne faze procesov, ki se odvijajo v več stopnjah, ki jih karakterizirajo čas, temperatura in uporabljene sile, deformacije in hitrosti deformacije. Fizikalna simulacija, če jo primerjamo z industrijskim preizkusom v polnem obsegu, omogoči, da se v delcu časa za del stroškov doseže izboljšanje sedanje tehnologije ali razvoj nove za moderne materiale in proizvode. Uporabljamo jo lahko za rešitev proizvodnih problemov povezanih s strjevalnimi pojavi ali z mejnimi deformacijami, ki povzročijo vročo pokljivostin izmeček proizvodov. V tem članku predstavljamo primere fizikalno simuliranih procedur in razpravljamo o njihovem fizikalnem ozadju.

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2015 Gunes, Ibrahim http://rightsstatements.org/vocab/InC/1.0/ application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-ABRYJNFD http://www.dlib.si/details/URN:NBN:SI:doc-ABRYJNFD eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Effect of sliding speed on the frictional behavior and wear performance of borided and plasma-nitrided W9Mo3Cr4V high-speed steel: Vpliv hitrosti drsenja na vedenje in obrabo boriranega in v plazmi nitriranega hitroreznega jekla W9Mo3Cr4V:

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2016 Matysík, Michal Plšková, Iveta Štoudek, Richard Trčka, Tomáš Vymazal, Tomáš http://rightsstatements.org/vocab/InC/1.0/ application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-D8X4CF0Q http://www.dlib.si/details/URN:NBN:SI:doc-D8X4CF0Q eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Acoustic and electromagnetic emission of lightweight concrete with polypropylene fibers: Akustična in elektromagnetna emisija lahkega betona s polipropilenskimi vlakni:

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2016 Dev Anand, M. Kurtaran, Hasan Sener, Bora http://rightsstatements.org/vocab/InC/1.0/ application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-INXFR6OA http://www.dlib.si/details/URN:NBN:SI:doc-INXFR6OA eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Modeling the deep drawing of an AISI 304 stainless-steel rectangular cup using the finite-element method and an experimental validation: Modeliranje globokega vleka pravokotne čaše iz AISI 304 nerjavnega jekla z metodo končnih elementov in z eksperimentalnim preverjanjem:

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2015 Jastrzębska, Ilona Pędzich, Zbigniew Szczerba, Jacek Szlęzak, Jakub Śnieżek, Edyta http://rightsstatements.org/vocab/InC/1.0/ application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-96HYZ45C http://www.dlib.si/details/URN:NBN:SI:doc-96HYZ45C eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Elastic behaviour of magnesia-chrome refractories at elevated temperatures: Elastično vedenje ognjevzdržnih gradiv magnezija-krom pri povišanih temperaturah:

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2017 Burja, Jaka Koležnik, Mitja Medved, Jože Nagode, Aleš Šetina, Barbara http://rightsstatements.org/vocab/InC/1.0/ application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-JH9HSTCM http://www.dlib.si/details/URN:NBN:SI:doc-JH9HSTCM eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article De-oxidation of PK942 steel with Ti and Zr: Dezoksidacija jekla PK942 S Ti in Zr:

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2008 Ambrožič, Milan Eterovič, Darko Kosmač, Tomaž Krnel, Kristoffer Petkovič, Natalija Pribošič, Irena Veskovič Bukudur, Stojana http://rightsstatements.org/vocab/InC/1.0/ application/html application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-I0SV3IZX http://www.dlib.si/details/URN:NBN:SI:doc-I0SV3IZX slv Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Merjenje obrabne obstojnosti strukturne keramike Alspodaj2Ospodaj3: Wear-resistance measurement of structural Al2O3:

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2012 Antić, Aco Hodolič, Janko Kosec, Borut Petrović, Petar B. Zeljković, Milan http://rightsstatements.org/vocab/InC/1.0/ application/html application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-ARKAYFXQ http://www.dlib.si/details/URN:NBN:SI:doc-ARKAYFXQ eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article The influence of tool wear on the chip-forming mechanism and tool vibrations: Vpliv obrabe orodja na mehanizem nastanka odrezka in vibracije orodja:

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2014 Recek, Nina Vesel, Alenka http://rightsstatements.org/vocab/InC/1.0/ application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-EFHV8G7L http://www.dlib.si/details/URN:NBN:SI:doc-EFHV8G7L eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Surface modification of polymer polyethylene terephthalate with plasmas created in different gases: Modifikacija površine polimera polietilen tereftalata s plazmo, ustvarjeno v različnih plinih:

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2014 Opiela, Marek http://rightsstatements.org/vocab/InC/1.0/ application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-9HKV3OZ0 http://www.dlib.si/details/URN:NBN:SI:doc-9HKV3OZ0 eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Thermomechanical treatment of Ti-Nb-V-B micro-alloyed steel forgings: Termomehanska obdelava odkovkov iz mikrolegiranega jekla Ti-Nb-V-B: The work presents the research results of the influence of thermomechanical treatment through forging on the microstructure and mechanical properties of newly elaborated micro-alloyed steel containing 0.28 % C, 1.41 % Mn, 0.028 % Ti, 0.027 % Nb and 0.019 % V. The applied thermomechanical treatment makes it possible to obtain a fine-grained microstructure of austenite during the hot working and the production of forged parts that acquire an advantageous set of mechanical properties and a guaranteed crack resistance after controlled cooling from the finishing plastic-deformation temperature and the successive tempering. The forgings produced with the method of thermomechanical treatment, consecutively subjected to tempering in the temperature range from 550 °C to 650 °C, have YS0.2 from 994 MPa to 939 MPa, UTS from 1084 MPa to 993 MPa and KV-40 from 77 J to 83 J. Delo predstavlja rezultate vpliva termomehanske obdelave s kovanjem na mikrostrukturo in mehanske lastnosti novo izdelanega mikrolegiranega jekla z 0,28 % C, 1,41 % Mn, 0,028 % Ti, 0,027 % Nb in 0,019 % V. Uporabljena termomehanska obdelava omogoča doseganje drobnozrnate mikrostrukture avstenita med vročo predelavo in izdelavo odkovkov, ki dobijo dobre mehanske lastnosti in zagotovljeno odpornost proti razpokam po kontroliranem ohlajanju iz končne temperature plastične deformacije in po popuščanju. Odkovki, izdelani po metodi termomehanske obdelave in nato popuščani v temperaturnem območju od 550 °C do 650 °C, imajo YS0.2 od 994 MPa do 939 MPa, UTS od 1084 MPa do 993 MPa in KV-40 od 77 J do 83 J.

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2004 Lenart, Stanislav http://rightsstatements.org/vocab/InC/1.0/ application/html application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-CUZTX9U5 http://www.dlib.si/details/URN:NBN:SI:doc-CUZTX9U5 slv Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Izboljšan postopek določanja strižnega modula zemljin na vseh nivojih deformacije: Soils as construction materials are most frequently in the foundations of different kinds of structures or as a base construction material in geotechnical structures. Soil behaves as a plastic material under loading conditions. As the deformation of soil increases, its stiffness changes. The stiffness of soil is very important in the case of dynamic loading conditions, and is described in terms of the shear modulus. Time-consuming laboratory tests are needed to determine the shear modulus. With an increase in the shear strain the shear modulus decrease. The reduction curve depends on several parameters. Different authors have suggested many empirical equations to describe the strain-modulus relation, but no general rule has been found. This paper presents a way of combining the resonant column test and the routine triaxial test results. Zemljine kot gradbeni material nastopajo najpogosteje v temeljih konstrukcij, pogosto pa so uporabljene tudi kot osnovni gradnik geotehničnih objektov. Pod vplivom obremenitev je njihovo vedenje izrazito plastično. Z naraščanjem deformacije se bistveno spreminja njihova togost, katere poznanje je posebej pomembno pri dinamičnih obremenitvah. Določanje velikosti strižnega modula pri zemljinah zahteva dolgotrajne laboratorijske preiskave. Strižni modul z naraščanjem deformacije upada, način spreminjanja vrednosti pa je odvisen od številnih dejavnikov. Različni avtorji so poskušali z empiričnimi formulami opisati te povezave, vendar so neuporabne za splošen primer. Prispevek rešuje način določanja strižnega modula z združevanjem rezultatov resonančnega preskusa in navadne triosne preiskave.

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2004 Kmetič, Dimitrij Skobir Balantič, Danijela Anica Vodopivec, Franc Vojvodič-Tuma, Jelena http://rightsstatements.org/vocab/InC/1.0/ application/html application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-4T1FQT0K http://www.dlib.si/details/URN:NBN:SI:doc-4T1FQT0K eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Effect of operating temperature on microstructure and creep resistance of 20CrMoV 121 steel: The degradation process of an X20CrMoV 121 steel with an initial microstructure of tempered martensite was investigated. The effects of the change of microstructure type, and of the carbide particles size and distribution were determined. Accelerated creep tests showed that the change of the mode of distribution of the carbide particles decreases more strongly due to creep resistance than the increase of the particle-to-particle distance. In the temperature range 550 compositumC to 800 compositumC, for annealing times from 2 h up to 1344 h, the hardness decreases faster at lower temperatures. It is possible to determine with sufficient reliability whether the steel's resistance to creep deformation was reduced below a safe level with non-destructive verification of the steel's microstructure and hardness. Opisan je proces degradacije jekla X20CrMoV121 z začetno mikrostrukturo iz popuščenega martenzita. Analiziran je vpliv spremembe mikrostrukture ter velikosti in porazdelitve karbidnih izločkov. S preizkusi pospešenega lezenja je bilo ugotovljeno, da sprememba porazdelitve karbidnih izločkov močneje vpliva na odpornost proti lezenju kot povečanje razdalje med izločki. V razponu temperature med 550 kompozitumC in 800 kompozitumC in za žarjenje do 1344 h se trdota po 2 h hitreje zmanjšuje pri nižji temperaturi žarjenja. Z zadostno zanesljivostjo je mogoče na podlagi trdote in mikrostrukture oceniti, ali se je zaradi obratovanja zmanjšala odpornost proti lezenju pod varen prag.

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2001 Možina, Janez Strgar, Simon http://rightsstatements.org/vocab/InC/1.0/ application/html application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-9OW7UGUP http://www.dlib.si/details/URN:NBN:SI:doc-9OW7UGUP slv Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Optodinamska analiza pulznih laserskih obdelovalnih procesov z Nd:YAG-laserjem: Optodynamic analysis of pulsed-laser processing with a Nd:YAG laser: Laser drilling and laser marking of metals with a pulsed Nd:YAG laser are discussed. Some characteristics of pulsed-laser processing and the possibilities of process optodynamic analysis are presented for the laser-drilling of aluminium. The optodynamic analysis is based on observation of generated shock waves, which propagate in the material as well as in the surrounding air during laser processing. For the detection of laser-induced shock waves in the air and for measurements of their characteristics the laser-beam deflection probe was used. A linear relation between the shock waves' propagation time and the depth of the laser-drilled holes was found for pulsed-laser drilling of aluminium. For marking purposes the pulse-laser processing system was improved with a communication interface. The preliminary results of laser marking with the introduced advanced system show a significant improvement of marking possibilities. V delu je obravnavano lasersko vrtanje in označevanje kovin s pulznim Nd:YAG-laserjem. Na primeru laserskega vrtanja aluminija so predstavljene značilnosti pulznih laserskih obdelovalnih procesov in možnosti njihove optodinamske analize. Optodinamska analiza izkorišča nastanek udarnih valov med laserskim obdelovalnim procesom, ki se širijo v obdelovanec in okoliški prostor. Za detekcijo lasersko induciranih udarnih valov v zraku in merjenje njihovih karakteristik smo uporabili lasersko odklonsko sondo. Med časom preleta udarnih valov in globino nastalih laserskih izvrtin je bila za pulzno lasersko vrtanje aluminija ugotovljena linearna odvisnost. Za potrebe laserskega označevanja smo pulzni laserski obdelovalni sistem nadgradili s spominsko-procesnim komunikacijskim vmesnikom. Laboratorijski rezultati označevanja so pokazali, da se z nadgradnjo sistema izrazito razširijo možnosti laserskega označevanja.

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2013 Burja, Jaka Knap, Matjaž Lamut, Jakob Tehovnik, Franc http://rightsstatements.org/vocab/InC/1.0/ application/html application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-A2BAFIL3 http://www.dlib.si/details/URN:NBN:SI:doc-A2BAFIL3 eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Alumothermic reduction of ilmenite in a steel melt: Alumotermična redukcija ilmenita v jekleni talini: Experiments regarding the alumothermic reduction of ilmenite (FeO x TiO2), a mineral that contains iron and titanium oxides, were carried out. The results of the experiments showed that the alumothermic reduction takes place in steel, but the products obtained with the reduction suggest that the reaction mechanism is more complicated and includes different metallic phases other than a simple reduction of pure elemental titanium. Two kinds of experiments were carried out, the alumothermic reduction of ilmenite in a steel melt and the alloying of the alumothermic mixture into the steel melt. The experiments were carried out in order to get a view of the phase boundary between the steel and reduced titanium and the metallic phases that occur during the reduction, before the dissolution of titanium in the steel melt. Metallic phases that contained aluminium, iron and titanium were gained during the alumothermic reduction of ilmenite. Titanium was successfully alloyed into the steel melt by introducing the alumothermic mixture into the melt, while the presence of titanium nitrides confirms that the titanium was reduced in the melt and reacted with the dissolved nitrogen. Izvedeni so bili poskusi alumotermične redukcije ilmenita. Ilmenit je mineral,ki vsebuje titanove in železove okside (FeO x TiO2). Rezultati so potrdili, da v jeklu poteče alumotermična redukcija. Produkti redukcije pa kažejo na to, da je reakcijski mehanizem bolj zapleten, kot pa zgolj nastajanje elementarnega titana, saj nastajajo različne kovinske faze. Izvedeni sta bili dve vrsti poskusov: alumotermična redukcija ilmenita in legiranje alumotermične mešanice v jekleno talino. Dobljen je bil vpogled v procese na fazni meji med jekleno talino, titanom in nastalimi kovinskimi fazami, preden se titan raztopi v jeklu. Ugotovljeno je bilo, da se titan raztaplja v jeklu prek nastanka intermetalnih faz. Produkti redukcije so bile kovinske faze, ki so vsebovale aluminij, titan in železo. Prisotnost titanovih nitridov v jeklu, ki smo ga legirali z mešanico, pa je dokaz, da je bil titan legiran v kovinski obliki, kjer je reagiral z raztopljenim dušikom.

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2017 Conradi, Marjetka Kocijan, Aleksandra http://rightsstatements.org/vocab/InC/1.0/ application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-089EL2FI http://www.dlib.si/details/URN:NBN:SI:doc-089EL2FI eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Comparison of the surface and anticorrosion properties of SiOsub2 and TiOsub2 nanoparticle epoxy coatings: Primerjava površinskih in protikorozijskih lastnosti epoksidnih prevlek obogatenih s SiOspodaj2 in TiOspodaj2 nanovključki:

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2015 Barčić, Enis Delić, Alen Hodžić, Nusmir Kablar, Omer Kovačević, Džemal Zulić, Almir http://rightsstatements.org/vocab/InC/1.0/ application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-IUJWSJDF http://www.dlib.si/details/URN:NBN:SI:doc-IUJWSJDF eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Mechanical properties of the austenitic stainless steel X15CrNiSi20-12 after recycling: Mehanske lastnosti avstenitnega nerjavnega jekla X15CrNiSi20-12 po recikliranju:

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2005 Jauković, Nada Lalović, Milisav Radović, Žarko http://rightsstatements.org/vocab/InC/1.0/ application/html application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-JV3BGC04 http://www.dlib.si/details/URN:NBN:SI:doc-JV3BGC04 eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Investigation of the texture of an RR 58 aluminum alloy containing zirconium and lanthanides:

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2000 Bizjak, Milan Kosec, Ladislav Roth, Jože http://rightsstatements.org/vocab/InC/1.0/ application/html application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-4CLI82V8 http://www.dlib.si/details/URN:NBN:SI:doc-4CLI82V8 slv Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Temperaturna nestabilnost mikrostrukturnih sestavin v zlitinah Ag-Te in Ag-Se: Phase instability in Ag-Te and Ag-Se alloys: In researching high-temperature phase instability in Ag-1,2 at.% Se and Ag-1,2at.% Te aloys the kinetic and activation energy of the growth of intermetallic particles were determined. The results presented in this paper show that paarticles grow by bulk diffusion controlled with the diffusivity of selenium and tellurium in silver. It was also found that particle radius follows ?$R^2$?-t relationship at all temperatures of the experiment. Z raziskavami visokotemperaturne nestabilnosti mikrostrukture zlitin Ag - 1,2 at.% Se in Ag - 1,2 at.% Te smo določili kinetiko in aktivacijsko energijo rasti delcev intermetalne faze. V prispevku predstavljeni rezultati kažejo, da je rast delcev kontrolirana z volumsko difuzijo selena in telurja v srebru in da kvadrat polmera delcev s časom narašča linearno (?$R^2$?-t) pri vseh raziskanih tempeaturah.

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2014 Afshari, Davood Barsoum, Zuheir Karimi, Mohammad Reza Sedighi, Mohammad http://rightsstatements.org/vocab/InC/1.0/ application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-M0MIGQXY http://www.dlib.si/details/URN:NBN:SI:doc-M0MIGQXY eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Prediction of the nugget size in resistance spot welding with a combination of a finite-element analysis and an artificial neural network: Napovedovanje področja pretalitve pri uporovnem varjenju s kombinacijo analize končnih elementov in umetnih nevronskih mrež: The goal of this investigation is to predict the nugget size for a resistance spot weld of thick aluminum 6061-T6 sheets 2 mm. The quality and strength of spot welds determine the integrity of the structure, which depends thoroughly on the nugget size. In this study, the finite-element method and artificial neural network were used to predict the nugget size. Different spot welding parameters such as the welding current and the welding time were selected to be used for a coupled, thermal-electrical-structural finite-element model. In order to validate the numerical results a series of experiments were carried out and the nugget sizes were measured. The results obtained with the finite-element analysis were used to build up a back-propagation, artificial-neural-network model for the nugget-size prediction. The results revealed that a combination of these two developed models can accurately and rapidly predict the nugget size for a resistance spot weld. Cilj te preiskave je napovedati velikost področja pretalitve pri uporovno zvarjeni aluminijasti pločevini 6061-T6, debeli 2 mm. Kvaliteta in trdnost točkastega zvara določata celovitost konstrukcije, kar je odvisno predvsem od velikosti področja pretalitve. V tej študiji sta bili za napovedovanje velikosti področja pretalitve uporabljeni metoda končnih elementov in umetna nevronska mreža. Izbrani so bili različni parametri varjenja, kot sta varilni tok in čas varjenja, za skupni termično-električno-strukturni model končnih elementov. Za oceno numeričnih rezultatov je bilo izvršenih več preizkusov in izmerjena je bila velikost področja pretalitve. Rezultati, dobljeni iz analize končnih elementov, so bili uporabljeni za gradnjo modela umetne nevronske mreže za napovedovanje velikosti področja pretalitve. Rezultati so odkrili, da kombinacija teh dveh razvitih modelov lahko zanesljivo in hitro napove velikost področja pretalitve pri uporovnem točkastem zvaru.

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2012 Marek, Ivo Mejzlíková, Lucie Michalcová, Alena Novák, Pavel Vojtěch, Dalibor http://rightsstatements.org/vocab/InC/1.0/ application/html application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-GEJZKSEC http://www.dlib.si/details/URN:NBN:SI:doc-GEJZKSEC eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Reactive-sintering production of intermetallics: Izdelava intermetalnih zlitin z reaktivnim sintranjem: Intermetallic phases offer a large variety of interesting properties, such as high-temperature oxidation resistance, creep resistance, special magnetic properties, shape memory or the ability to store hydrogen reversibly. However, the practical utilization of this group of materials is very limited due to problematic production. Casting is commonly applied to produce many of these materials, even though there are strong limitations of this technology, such as high melting points and poor casting properties. Powder metallurgy involving the reactive sintering of compressed mixtures of elemental powders is one of the promising alternative production routes. In this work, the preparation of several technically important intermetallics was tested. Aluminide- and silicide-based high-temperature materials and NiTi shape-memory alloys were successfully produced with this technique. Intermetalne faze imajo vrsto zanimivih lastnosti, kot so visoka temperaturna odpornost za oksidacijo, odpornost proti lezenju, posebne magnetne lastnosti, oblikovni spomin ter sposobnost reverzibilnega shranjevanja vodika. Vendar pa je praktična uporaba te vrste materialov močno omejena zaradi njihove problematične izdelave. Ulivanje se uporablja pri številnih teh zlitinah za njihovo proizvodnjo, čeprav obstajajo omejitve pri tej tehnologiji, kot so visoke temperature tališča in slaba livnost. Ena od obetajočih mogočih poti za njihovo proizvodnjo je prašna metalurgija, ki vključuje reakcijsko sintranje stisnjenih mešanic elementnih prahov. V tem delu je bila preizkušena izdelava več tehnično pomembnih intermetalnih zlitin. S to tehniko so bili uspešno izdelani visokotemperaturni materiali na osnovi aluminidov in silicidov ter zlitina NiTi s spominom.

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2003 Babnik, Aleš Diaci, Janez Gorkič, Aleš Grad, Ladislav Možina, Janez http://rightsstatements.org/vocab/InC/1.0/ application/html application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-4463B1AQ http://www.dlib.si/details/URN:NBN:SI:doc-4463B1AQ slv Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Optodinamski vidik varjenja aluminija s pulznim laserjem Nd:YAG: Optodynamic aspects of aluminium welding with a pulsed Nd:YAG laser:

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2013 Calik, Adnan Karakaş, Mustafa Serdar http://rightsstatements.org/vocab/InC/1.0/ application/html application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-ETT8BWG4 http://www.dlib.si/details/URN:NBN:SI:doc-ETT8BWG4 eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Effect of heat treatment on the microstructure and mechanical properties of martensitic stainless-steel joints welded with austenitic stainless-steel fillers: Vpliv toplotne obdelave na mikrostrukturo in mehanske lastnosti martenzitnih nerjavnih spojev, varjenih z avstenitnimi nerjavnimi elektrodami: AISI 422 martensitic stainless steels were welded according to the ISO 15792-1 standard with austenitic stainless-steel filler. The effects of tempering and preheating heat treatments were also evaluated. The microstructures of the welds were characterized with optical microscopy. Mechanical properties were determined via microhardness, tensile and fatigue tests, and compared to those of the unwelded AISI 422 steel. X-ray diffraction was used to characterize the phases present in the weld. Chromium carbides were observed at the grain boundaries of the welds. The precipitation was caused mainly by the diffusion of carbon into the austenitic stainless steel during the welding. The microhardness decreased from the base metal to the weld. The tensile-strength and percent-elongation values were improved with preheating and tempering heat treatments. The highest fatigue limit was obtained with preheating. Martenzitno nerjavno jeklo AISI 422 je bilo varjeno skladno s standardom ISO 15792-1 z elektrodami iz avstenitnega nerjavnega jekla. Ocenjen je bil vpliv kaljenja in predogrevanja. Mikrostruktura zvarov je bila opredeljena s svetlobno mikroskopijo. Mehanske lastnosti so bile določene z mikrotrdoto, nateznimi in utrujenostnimi preizkusi in primerjane z nevarjenim jeklom AISI 422. Rentgenska difrakcija je bila uporabljena za karakterizacijo faz v zvaru. Po mejah zrn v zvaru je bilo opaziti kromove karbide. Večino izločanja je povzročila difuzija ogljika v avstenitno jeklo med varjenjem. Mikrotrdota se je zmanjševala od osnovnega materiala do zvara. Vrednosti natezne trdnosti in delež raztezka so se povečali s predgrevanjem in s toplotno obdelavo. Najvišja odpornost proti utrujanju je bila dosežena s predgrevanjem.

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2007 Đurković, Snežana Ivanović, Mileta Knežević, Miloš Krgović, Milun Marstijepović, Nada Zejak, Radomir http://rightsstatements.org/vocab/InC/1.0/ application/html application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-COBVJLD2 http://www.dlib.si/details/URN:NBN:SI:doc-COBVJLD2 eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article The influence of illite-kaolinite clays' mineral content on the products' shrinkage during drying and firing: Vpliv vsebnosti glin ilinit-kaolinit na krčenje pri sušenju in žganju: In this paper an investigation of the influence of the mineral content of illite-kaolinite clays on the products' shrinkage during drying and firing is presented. Under the same conditions for preparing raw materials and ceramic mass, as well as under the same firing regime, the products' shrinkage during drying and firing is mostly influenced by the amounts of quartz and the illite and kaolinite clay minerals. Predstavljena je raziskava vpliva vsebnosti glin ilinit-kaolinit na krčenje pri sušenju in žganju. Pri enakih pogojih priprave surovega materiala in keramike in enakemu režimu žganja na krčenje najbolj vpliva razmerje med kremenom ter glino ilinit-kaolinit.

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2017 Knaislová, Anna Kopeček, Jaromír Kubatík, Tomáš Moravec, Hynek Novák, Pavel Školáková, Andrea Vladimír, Vojtěch http://rightsstatements.org/vocab/InC/1.0/ application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-FOEG3H6B http://www.dlib.si/details/URN:NBN:SI:doc-FOEG3H6B eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Powder-metallurgy preparation of NiTi shape-memory alloy using mechanical alloying and spark-plasma sintering: Uporaba metalurgije prahov za pripravo NiTi zlitine s spominom s pomočjo mehanskega legiranja in sintranja z iskrilno plazmo:

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2016 Nacházel, Jan Sláma, Peter http://rightsstatements.org/vocab/InC/1.0/ application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-N2N120LU http://www.dlib.si/details/URN:NBN:SI:doc-N2N120LU eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Effect of thermomechanical treatment on the intergranular corrosion of Al-Mg-Si-Type alloy bars: Vpliv termomehanske predelave na interkristalno korozijo palic iz zlitin Al-Mg-Si:

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2013 Ćurčija, Dušan Mamuzić, Ilija Vodopivec, Franc http://rightsstatements.org/vocab/InC/1.0/ application/html application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-CIPUHIJR http://www.dlib.si/details/URN:NBN:SI:doc-CIPUHIJR eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Calculation of the lubricant layer for a coarse surface of a band and rolls: Izračun sloja maziva na grobi površini traku in valjev: The effect of the average roughness of a lubricated band caused by dressing processes is analysed by applying the Reynolds differential equation for lubrication with the incorporated average roughness and evolution in the Fourier series to the third member. The analysis has shown that the average roughness has two effects on the lubricant-layer thickness in the entering section of the deformation zone. For a small surface roughness, the nominal lubricant-layer thickness decreases slowly (if the process is treated as occurring on a smooth surface) and the thickness grows again with an increase in the roughness. The basis for the analysis was the numerical Monte-Carlo method and the developed approximate analytical solution was in acceptable agreement with the numerical method. Analiziran je vpliv povprečne hrapavosti mazanega traku pri procesih dresiranja. Podlaga analize je Reynoldsova diferencialna enačba za mazanje z vključeno povprečno hrapavostjo in obravnavo s Fourierovo vrsto do tretjega člena. Analiza je pokazala, da ima povprečna hrapavost dva učinka na debelino plasti maziva v vhodnem preseku področja deformacije. Pri majhni začetni hrapavosti se nominalna debelina plasti maziva počasi zmanjšuje (če se proces obravnava, kot da poteka na gladki površini) in znova raste, če se povečuje hrapavost. Podlaga za analizo je bila numerična metoda Monte Carlo, razvita pa je bila tudi približna analitična rešitev, ki se zadovoljivo ujema z numerično.

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2016 Torkar, Matjaž http://rightsstatements.org/vocab/InC/1.0/ application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-IR4WVUBO http://www.dlib.si/details/URN:NBN:SI:doc-IR4WVUBO eng slv Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Predgovor urednika: Editor's preface:

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2011 Donik, Črtomir http://rightsstatements.org/vocab/InC/1.0/ application/html application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-DMMY3YFN http://www.dlib.si/details/URN:NBN:SI:doc-DMMY3YFN eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Surface characterization and pickling characteristics of the oxide scale on duplex stainless steel: Površinska karakterizacija in lastnosti luženja oksidne plasti na dupleksnem nerjavnem jeklu: Mixtures of hydrofluoric (HFsub(aq)) and nitric acids (HNOsub3) used for the pickling of stainless steels to remove thick oxide scale generate waste liquids with a high HF concentration. The oxide formation during production annealing and the subsequent pickling response in mixed acids have been studied. A cost reduction and a procedure optimization can be achieved by the use of the proper concentration of mixed acids and a low pickling temperature. In this work, new mixtures of both with a high pickling efficiency for solutions designed for duplex stainless steel are checked. The experiments were carried with mixtures consisting of mass fractions 0.5-4.0 % HFsub(aq) and 12.5-22.0 % HNOsub3 at room and elevated temperatures. The goal of the presented work was to determine the optimal pickling time with respect to the temperature and the acid mixture concentration. Mešanice fluorovodikove in dušikove(V) kisline z visoko koncentracijo fluorovodikove kisline se uporablja za luženje nerjavnega jekla, ko po žarjenju ostanejo na površini visokotemperaturni oksidi. Raziskovali smo tvorjenje visokotemperaturnih oksidov pri žarjenju in posledično vpliv kislinskih mešanic pri odstranjevanju le-teh. Z optimizacijo postopkov uporabe kislinskih mešanic in procesov, povezanih s tem, ter uporabo najprimernejše mešanice pri najnižji temperaturi lahko zelo zmanjšamo stroške, povezane s končno pripravo nerjavnih jekel. V predstavljenem delu smo preiskovali, kako in katere kislinske mešanice fluorovodikove (HFspodaj(aq)) in dušikove(V) kisline (HNOspodaj3) so najugodnejše za luženje dupleksnih nerjavnih jekel. Preiskave smo naredili pri mešanicah 0.5-4.0 % HFspodaj(aq) in 12.5-22.0 % HNOspodaj3 pri sobni in povišanih temperaturah. Cilj predstavljenega dela je bila povezava med sestavo oksidne plasti na površini DSS 2205 in hitrostjo odstranjevanja le-te v povezavi s temperaturo in sestavo kislinske mešanice za optimalno dekapirno raztopino.

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2002 Gerdun, Viktor Godec, Boštjan http://rightsstatements.org/vocab/InC/1.0/ application/html application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-D35472L4 http://www.dlib.si/details/URN:NBN:SI:doc-D35472L4 slv Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Neugodne mikrostrukturne sestavine v zvarnih spojih konstrukcijskih jekel: Unfavourable micro-constituents in the welded joints of construction steels:

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2004 Gilgert, Joseph Leskovšek, Vojteh Montannari, F. Pluvinage, Guy Šuštaršič, Borivoj Vojvodič-Tuma, Jelena http://rightsstatements.org/vocab/InC/1.0/ application/html application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-DBMOWDLM http://www.dlib.si/details/URN:NBN:SI:doc-DBMOWDLM eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Fracture-mechanics characteristics of M-2-type high-speed steel: This study presents some of the investigations made in the frame of the project called Determination of notch fracture toughness of tool steels, which is part of the Slovenia-France bilateral scientific cooperation named Proteus. The paper presents a determination of the notch fracture toughness with a non-standardised method. This is the so-called determination of the notch stress-intensity factor Ksub(p,c) on specimens without a fatigue crack but with different notch radii. For the investigations and experiments, hard and brittle, M-2-type high-speed steel was selected. During loading it behaves in acompletely linear-elastic way to the point of fracture. In the introduction, the volumetric approach is presented, where it is assumed that material fracture starts and continues if an appropriately large physical volume is available and that this volume is loaded with a certain average equilibrium stress. The basis for the determination of the effective volume, the distance and the stress is a numerical calculation based on the finite-element method (FEM). The results of the FEM calculations are presented and discused. The experimental procedures and the results of the method are also presented. The experimental results are supported by microstructural and fractographic examinations. V prispevku predstavljamo del raziskav, ki je bil opravljen v okviru projekta z naslovom: Določevanje lomne žilavosti orodnih jekel na preizkušancih z zarezo, pod okriljem Slo-F bilateralnega znanstvenega sodelovanja Proteus. Prikazan je nestandardni način določevanja faktorja intenzitete napetosti v zarezi Kspodaj(p,c) brez utrujenostne razpoke toda z različnimi korenskimi polmeri. Za preiskave smo izbrali trdo in krhko hitrorezno jeklo vrste M-2, ki se vede linearno-elastično praktično do loma. Predstavljen je volumetrični lomno-mehanski način, kjer je privzeto, da se proces loma prične in nadaljuje, če je za to na razpolago neki ustrezno velik fizikalni volumen, na katerega deluje neka povprečna uravnotežena napetost. Določevanje efektivne prostornine, razdalje in napetosti temelji na numeričnih izračunih z metodo končnih elementov. Predstavljamo potek in rezultate računalniške simulacije naosnovi metode končnih elementov za določitev efektivne napetosti in efektivne razdalje v korenu zareze, ki so osnova za določitev kritičnega faktorja intenzitete napetosti v zarezi. V nadaljevanju podajamo potek preizkusov in eksperimentalne rezultate določevanja lomne žilavosti v zarezi, ki so podprti z mikrostrukturnimi in fraktografskimi preiskavami.

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2011 Doliška, Aleš Kolar, Metod Stana-Kleinschek, Karin Zaplotnik, Rok http://rightsstatements.org/vocab/InC/1.0/ application/html application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-JOSJVZ2Q http://www.dlib.si/details/URN:NBN:SI:doc-JOSJVZ2Q eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Modification of PET-polymer surface by nitrogen plasma: Modifikacija površine PET-polimera z dušikovo plazmo: Low pressure weakly nitrogen plasma was applied for incorporation of nitrogen-containing functional groups onto poly(ethylene terephthalate) - PET polymer. Nitrogen plasma was created in an electrode-less radiofrequency discharge at the nominal power of 200 W and the frequency of 27.12 MHz. Nitrogen molecules entered the discharge region were highly excited, partially dissociated and weakly ionized. Transformation into the state of plasma allowed for creation of chemically reactive particles with a high potential energy while the kinetic energy remained close to the value typical for room temperature. The chemical reactivity allowed for rapid functionalization with nitrogen-rich functional groups. The appearance of these groups was monitored by X-ray photoelectron spectroscopy - XPS. The polymer surface was quickly saturated with nitrogen indicating that the modification was limited to an extremely thin surface film. Nizkotlačno, šibko ionizirano dušikovo plazmo smo uporabili za površinsko modifikacijo polimera polietilen tereftalat z dušikovimi funkcionalnimi skupinami. Plazmo smo vzbujali v brezelektrodni visokofrekvenčni plinski razelektritvi z generatorjem, ki deluje pri koristni moči okoli 200 W in osnovni frekvenci 27,12 MHz. Dušikove molekule, ki vstopijo v plinsko razelektritev, se vzbudijo v visoka vzbujena stanj, delno disociirajo in šibko ionizirajo. Transformacija plina v stanje plazme omogoča nastanek kemično reaktivnih delcev z veliko potencialno energijo, medtem ko ostane njihova kinetična energija blizu vrednosti, ki je značilna za plinske molekule pri sobni temperaturi. Velika kemijska reaktivnost dušikove plazme omogoča hitro funkcionalizacijo površine PET-polimera z dušikom bogatimi funkcionalnimi skupinami. Ta pojav smo spremljali z rentgensko fotoelektronsko spektroskopijo. Polimerni vzorci so postali hitro nasičeni z dušikom, iz česar je mogoče sklepati, da je funkcionalizacija omejena na zelo tanko plast prav ob površini vzorcev.

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2016 Baláš, Marek Kracík, Petr Lisý, Martin Pospíšil, Jiri http://rightsstatements.org/vocab/InC/1.0/ application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-816DUGHP http://www.dlib.si/details/URN:NBN:SI:doc-816DUGHP eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article The size effect of heat-transfer surfaces on boiling: Vpliv velikosti površin, ki prenašajo toploto na vrenje:

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2017 Abedini, Omid Marashi, Seyed Pirooz Hoveida Ranjbarnodeh, Eslam http://rightsstatements.org/vocab/InC/1.0/ application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-6TX901MN http://www.dlib.si/details/URN:NBN:SI:doc-6TX901MN eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Effect of tool geometry and welding parameters on the microstructure and static strength of the friction-stir spot-welded DP780 dual-phase steel sheets: Vpliv geometrije orodja in parametrov varjenja na mikrostrukturo in statično trdnost torno vrtilnega točkovnega varjenja dvofazne jeklene pločevine DP780:

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2009 http://rightsstatements.org/vocab/InC/1.0/ application/pdf text/plain application/xml info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-AMKJU4J8 http://www.dlib.si/details/URN:NBN:SI:doc-AMKJU4J8 slv Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/contributionToPeriodical Materiali in tehnologije:

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2018 Dai, Quili Liu, Jun Pan, Peng Wei, Jun Yang, Zhengcun Yuan, Qiping Zhang, Ruifeng http://rightsstatements.org/vocab/InC/1.0/ application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-FCYEHQDJ http://www.dlib.si/details/URN:NBN:SI:doc-FCYEHQDJ eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article A screen-printed piezoelectric energy harvester using ZnO tetrapod arrays: Sitotisk piezoelektričnega zbiralca energije z uporabo ZnO tetrapodnih matric:

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2015 Jager, Robert Kovačič, Miha http://rightsstatements.org/vocab/InC/1.0/ application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-FGIP4Q19 http://www.dlib.si/details/URN:NBN:SI:doc-FGIP4Q19 eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Modeling of occurrence of surface defects of C45 steel with genetic programming: Modeliranje pojava površinskih napak pri jeklu C45 z genetskim programiranjem:

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2014 Djurdjevic, Mile B. Dolić, Natalija Manasijević, Srećko Odanović, Zoran Radiša, Radomir http://rightsstatements.org/vocab/InC/1.0/ application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-CJVL8YHQ http://www.dlib.si/details/URN:NBN:SI:doc-CJVL8YHQ eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Quantification of the copper phase(s) in Al-5Si-(1-4)Cu alloys using a cooling curve analysis: Uporaba analize ohlajevalne krivulje za oceno količine bakrovih faz v zlitinah Al-5Si-(1-4)Cu:

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2016 Dvořák, Karel Hájková, Iveta http://rightsstatements.org/vocab/InC/1.0/ application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-8BQ1G43X http://www.dlib.si/details/URN:NBN:SI:doc-8BQ1G43X eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article The effect of high-speed grinding technology on the properties of fly ash: Vpliv tehnologije hitrega mletja na lastnosti letečega pepela:

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2011 Avdiaj, Sefer Erjavec, Bojan Šetina, Barbara Šetina, Janez http://rightsstatements.org/vocab/InC/1.0/ application/html application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-8HNWUREF http://www.dlib.si/details/URN:NBN:SI:doc-8HNWUREF eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Oxygen diffusion in the non-evaporable getter St 707 during heat treatment: Difuzija kisika v getru St 707 med toplotno obdelavo: The oxygen diffusion and microstructure were investigated in specimens of commercial Non Evaporable Getter under the trademark of St 707, which is an alloy of Zr(70)-V(24.6)-Fe(5.4) using EDS, AES and XRD. Specimens were in the form of tablets compressed from St 707 powder of typical particle size from 50 m to 100 m. To obtain an observable amount of oxygen in the bulk material,we loaded the getter specimen at 450 °C at oxygen partial pressure of 1.2 10-4 Pa for 1 h. Using AES and EDS we investigated the distribution ofoxygen in different phases of the alloy. From the concentration profile, we can see the considerable diffusion length of the oxygen into the getter. This diffusion length is much larger in the Laves phase compared to the zirconium phase. On the zirconium phase two different layers are formed, an oxide layer composed of ZrO2 followed by a diffusion layer, while on the Laves phase only a diffusion layer can be found. In this paper, we also determined the phases present in our materials, as well as the changes of these phases after oxidation. Preučevali smo mikrostrukturo in difuzijo kisika v neuparljivih getrih St 707 (zlitina Zr(70)-V(24,6)-Fe(5,4)) z metodami EDS, AES in XRD. Preizkušanci so bili v obliki stisnjenih tablet z značilno velikostjo delcev med 50 m in 100 m. Pri temperaturi 450 °C smo preizkušance izpostavili kisiku pri tlaku 1.2 10-4 Pa za 1 h. Z metodami AES in EDS smo opazili različno povečanje vsebnosti kisika v različnih fazah zlitine. Iz koncentracijskega profila je razvidna velika difuzijska dolžina za kisik v getrskem materialu. V Lavesovih fazah opazimo znatno daljšo difuzijsko dolžino kot v cirkonijevi fazi. Na površini cirkonijeve faze smo našli dve različni plasti. Na vrhu je oksidna plast ZrO2, ki ji sledi difuzijska plast. V Lavesoih fazah pa najdemo le difuzijsko plast. Prav tako smo ugotovili fazno sestavo materiala in spremembe zaradi oksidacije.

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2004 Bizjak, Martin Koprivšek, Mitja Kovač, Janez http://rightsstatements.org/vocab/InC/1.0/ application/html application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-C8N8NK9O http://www.dlib.si/details/URN:NBN:SI:doc-C8N8NK9O slv Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Pojavi na talilnem elementu varovalke v talilni fazi izklopa: Test samples of melting fuses rated for a current of 63 A were subjected to tests with a breaking current of 100 A, where the melting of the fuse element is the principal process of current interruption. Particular sites of the fuse element strip, notches, are coated with an alloy with a low melting point and in this way they enable the break of the overcurrent by melting and dissolving the base Cu strip. The investigation of the fuse elements was performed after the break tests and involved optical microscopy, metallography, SEM and EDX microanalysis of the chemical composition. Results were analyzed using binary diagrams of Cd-Sn, Cu-Sn and Cd-Cu. The effects of phenomena which occasionally prolong the melting process were investigated in order to reduce excessive heating of the fuse link during the break. As a prolonged type of melting phase could be thermally harmful to the adjacent plastic parts of insulation, measures to avoid it are important for the design of the fuse element and its manufacturing technology. Na talilnem vložku varovalke za nazivni tok 63 A je bil izveden preskus izklopa toka 100 A. V teh razmerah pride do prekinitve toka v varovalki med talilno fazo, ko se na talilnem elementu stalijo perforirani segment na prekinitvenih mestih, kjer je nanesena plast nizkotaljive zlitine. Po preskusu je bil talilni element preiskan z optično mikroskopijo, metalografijo, elektronsko mikroskopijo in elektronsko mikroanalizo. Za presojo rezultatov so bili uporabljeni binarni diagrami za pare Cd-Sn, Cu-Sn in Cd-Cu. Ugotovljeni so bili vzroki, ki včasih usmerijo potek izklopa v podaljšano talilno fazo, namesto da bi se končal z normalno, v kateri učinki izklopa niso nevarni za bližnjo okolico. Kako te vzroke odpraviti s spremembo konstrukcije talilnega elementa ali tehnologijo izdelave, je pomembno za proizvajalca varovalk.

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2008 Balcar, Martin Bažan, Jiří Fila, Pavel Kešner, Dušan Kraus, Libor Martínek, Ludvík Sochor, Libor Železný, Rudolf http://rightsstatements.org/vocab/InC/1.0/ application/html application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-D4W35IF1 http://www.dlib.si/details/URN:NBN:SI:doc-D4W35IF1 eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Developing and testing a new type-8K mould for tool-steel ingot casting: Razvoj in preizkus nove kokile vrste 8K za ulivanje ingotov iz orodnega jekla: The traditional production of machinery and tools at ŽĎAS, a. s., and the increasing requirements placed on the final product, particularly those related to the internal quality of forgings, requires new technological measures for the ingot's casting and solidification. The development and use of the new mould type 8K9.2 for tool-steel ingot casting the reduced the share of forgings with unacceptable quality. A substantial improvement has been achieved, especially in terms of the occurrence of defects, such as cavities and cracks in the ingot body. Tradicionalna proizvodnja strojev in orodij v podjetju ŽDAS, a. s., in naraščajoče zahteve pri lastnostih končnega proizvoda, ki so povezane z notranjo kakovostjo izkovkov, so zahtevale nove tehnološke ukrepe pri litju in strjevanju ingotov. Razvoj in uporaba nove kokile vrste 8K9.2 za litje jeklenih ingotov sta zmanjšala delež ingotov nesprejemljive kakovosti. Pomembno izboljšanje je bilo doseženo pri pogostosti napak, razpok in votlin v notranjosti ingota.

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2000 Anžel, Ivan Križman, Alojz Rudolf, Rebeka http://rightsstatements.org/vocab/InC/1.0/ application/html application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-1KNOZXIT http://www.dlib.si/details/URN:NBN:SI:doc-1KNOZXIT slv Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Kvantitativna mikrostrukturna analiza kompozita Cu-C: Quantitative microstructural analysis of CuC composites: Sintered materials have a rather specific microstructure which affects their properties. The influential elements of the microstructure of these materials are porosity, size, form and distribution of sintered components, and the type, properties and fraction of interfaces and other factors. The volume fraction and the structure of the microstructural elements must be controlled and optimised during the sintering process in order to achieve the technical functionality of the product. The most widely used methods, which permit microstructural characterisation and identification of the microstructural development during the sintering process, are qualitative and quantitative microscopy. Quantitative microscopy, which consists of measurements of the microstructure's geometrical parameters and of the stereometrical analysis, enables us to determine the relation between the influential parameters of the sintering process and the obtained microstructure. The microstructure development of the sintered Cu-C composite will be described by quantitative microstructural analysis, with the objective of defining the influence of process parameters on the mcrostructural development and material properties. Special attention is focused on the size, shape and volume fraction of each influential microstructural element. Sintrani materiali imajo dokaj specifično mikrostrukturo, ki močno vpliva na njihove lastnosti. Med vplivne mikrostrukturne elemente teh materialov štejemo poroznost, velikost, obliko in porazdelitev komponent, ki jih sintramo, vrsto, lastnosti in delež posameznih mejnih površon in druge. Če želimo doseči s sintranjem tehnično uporabne izdelke, morajo biti volumski delež in karakter posameznih mikrostrukturnih elementov kontrolirani oziroma optimirani. Od metod, ki omogočajo karakterizacijo mikrostrukture in spremljanje razvoja posameznih mikrostrukturnih elementov med izdelavo, sta zelo uporabni kvalitativna in kvantitativna mikroskopija. Predvsem kvantitativna mikroskopija, ki je sestavljena iz meritev geometrijskih parametrov mikrostrukturnih elementov ter stereometrične analize, omogoča določitev odnosa med vplivnimi tehnološkimi parametri, mikrostrukturo in lastnostmi. V prispevku predstavljamo rezultate kvantitativne analize mikrostrukture kompozita Cu-C, nastale v različnih fazah izdelave. S spremljanjem velikosti, oblike in volumskega deleža posameznega mikrostrukturnega elementa smo spremljali tudi mikrostrukturo in iskali mehanizme procesov, ki v posamezni tehnološki fazi določajo njen razvoj.

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2016 Çöl, Mustafa Erzincanli, Fehmi Kir, Durmuş Koç, Funda Gül Öktem, Hasan http://rightsstatements.org/vocab/InC/1.0/ application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-ILT504VP http://www.dlib.si/details/URN:NBN:SI:doc-ILT504VP eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Determination of the cutting-tool performance of high-alloyed white cast iron (Ni-Hard 4) using the Taguchi method: Določanje zmogljivosti rezalnih orodij na močno legiranem belem litem železu (Ni-Hard 4) z uporabo Taguchi metode:

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2015 Franěk, Zdeněk Masarik, Miloš Šmíd, Jaromír http://rightsstatements.org/vocab/InC/1.0/ application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-LCPGSMCQ http://www.dlib.si/details/URN:NBN:SI:doc-LCPGSMCQ eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Determination of the cause of the formation of transverse internal cracks on a continuously cast slab: Ugotavljanje vzrokov za nastanek notranjih prečnih razpok v kontinuirno ulitem slabu:

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2018 Anganan, Karuppannan Muthukrishnan, Mayakrishnan Prabagaran, Subramaniam http://rightsstatements.org/vocab/InC/1.0/ application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-M19N7HKE http://www.dlib.si/details/URN:NBN:SI:doc-M19N7HKE eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Experimental study and analysis of the wear properties of friction-stir-welded AA7075-T6 and A384.0-T6 dissimilar aluminium alloys of butt joints: Eksperimentalna študija in analiza obrabe zvarov, izdelanih z rotacijskim tornim varjenjem raznovrstnih zlitin AA7075-T6 in A384.0-T6:

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2012 Marinšek, Marjan Zupan, Klementina http://rightsstatements.org/vocab/InC/1.0/ application/html application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-HTZ0LAC9 http://www.dlib.si/details/URN:NBN:SI:doc-HTZ0LAC9 eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Microstructure development of the Ni-GDC anode material for IT-SOFC: Razvoj mikrostrukture Ni-GDC anodnega materiala za srednjetemperaturne SOFC: The NiO-GDC-based material is a potential candidate for an anode material for the low-temperature SOFCs. In this work a modified combustion synthesis was used for the preparation of NiO-GDC. The main advantage of the preparation method employed was that after the synthesis both phases, NiO and GDC, in the ash product were randomly distributed on a nanometre scale. The citrate-nitrate (c/n) ratios in the combustion-reaction mixtures varied from 0.15 to 0.18. The prepared powders were isostatically pressed into pellets, sintered at 1200 °C, 1250 °C, 1300 °C, 1350 °C or 1400 °C, reduced and subsequently submitted to a microstructure analysis. The crystallite sizes of both phases in the as-prepared powders, as well as the grain sizes of nickel in the final reduced samples greatly depended on the slight variation of the c/n ratio in the starting reaction gel mixture. In the as-synthesized samples, crystallite sizes were calculated to be 4.3 nm or 40.0 nm for the GDC phase and 7.6 nm or 48.0 nm for the NiO phase for the samples with the c/n ratios of 0.15 or 0.18, respectively. After sintering under different conditions and reductions, the final average particle size of Ni varied from 71 nm to 146 nm or from 143 nm to 254 nm, while the average size of GDC grains ranged from 84 nm to 193 nm or from 96 nm to 247 nm for the samples with the c/n ratios of 0.15 or 0.18, respectively. The temperatures from 1200 °C to 1250 °C were recognized as the most appropriate temperature interval that provided good connectivity between the grains and the smallest one-phase regions in the final Ni-GDC cermets with an average Ni-particle diameter of around 70 nm. Materiali na osnovi NiO-GDC spadajo med potencialne kandidate za izdelavo anod v srednjetemperaturnih SOFC. NiO-GDC smo pripravili z modificirano zgorevalno sintezo. Največja prednost metode je ta, da sta po sintezi obe fazi NiO in GDC naključno porazdeljeni na nanometrskem nivoju. Citratno-nitratno razmerje c/n v reakcijskih zmeseh je bilo 0,15 in 0,18. Pripravljeni prah smo po sintezi izostatsko stisnili v tablete, jih sintrali pri temperaturah 1200 °C, 1250 °C, 1300 °C, 1350 °C in 1400 °C, reducirali ter izvedli kvantitativno analizo mikrostruktur. Razmerje c/n v začetni raztopini močno vpliva na velikost kristalitov faz (NiO in GDC) v vzorcu po sintezi, kot tudi na velikost zrn faz v sintranih in reduciranih vzorcih. Najmanjša nikljeva zrna (povprečna velikost okoli 70 nm) v končnem Ni-GDC-kompozitu keramika-kovina so nastala po sintranju in kasnejši redukciji v temperaturnem intervalu med 1200 °C in 1250 °C.

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2002 Gliha, Vladimir Rojko, Danilo http://rightsstatements.org/vocab/InC/1.0/ application/html application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-87MDMHXK http://www.dlib.si/details/URN:NBN:SI:doc-87MDMHXK slv Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Vpliv gradnje večvarkovnega zvara na žilavost: Effect of multi-pass weld build-up on weld-metal toughness: The influence of a weld's thermal cycle on the microstructures and the impact toughness of the weld metal are experimentally analysed. For this purpose we used the SMITWELD simulator for the thermal cycle. With a simulator for the thermal cycle it is possible to simply reproduce the microstructures of a heat-affected zone and the microstructures of the weld metal. Also, it is possible to simulate the segregation proces as part of the weld's thermal cycle. For this purpose a different thermal cycle with a different peak temperature on a real single-pass weld joint produced by submerged arc welding was used. With this experimental work the simulation of the effect of weld build-up on the weld-metal toughness and the formation of a local brittle zone in laboratory conditions was performed.

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2008 Lamut, Martin Mandrino, Djordje Torkar, Matjaž http://rightsstatements.org/vocab/InC/1.0/ application/html application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-H97WS7U8 http://www.dlib.si/details/URN:NBN:SI:doc-H97WS7U8 eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article An AES investigation of brushed AISI 304 stainless steel after corrosion testing: AES-preiskave krtačenega nerjavnega jekla AISI 304 po korozijskem preskusu: During a test in a wet salt (NaCl) chamber rusty spots and elongated pits appeared on the brushed surface of a prototype casing for a household device made from AISI 304 stainless steel. The corrosion pits only formed on the brushed surface and on the deformed edges. Metallography revealed deformation-induced martensite and delta ferrite in the microstructure. In the wet salt environment the brushed surface showed a lower corrosion resistance than the non-brushed surface. The corrosion was explained as being due to damage to the protective oxide layer with brushing, insufficient re-passivation and the presence of iton particles. The corrosion propensity of the brushed surface of the casing was increased by the presence of deformation-induced martensite, delta ferrite and, probably, the remains of iron particles. The use of AISI 316 stainless steel, alloyed with molybdenum, would be more appropriate for avoiding the formation of corrosion pits due to chloride ions in a wet environment. Ohišje prototipne gospodinjske naprave je bilo izdelano iz nerjavnega jekla AISI 304. Iz dekorativnih razlogov je bila površina krtačena. Med preskusom v vlažni slani komori se je pojavila korozija v obliki rjastih madežev in podolgovatih jamic vzdolž zakrivljenega roba. Predstavljeni so rezultati metalografske preiskave in analiza korozijskih produktov. Korozijske jamice se opazi samo na predhodno krtačeni površini in po deformiranih robovih. Z metalografskimi preiskavami smo odkrili v mikrostrukturi po deformiranih robovih prisotnost deformacijskega martenzita in delta ferita. V vlažnem slanem (NaCl) okolju je krtačena površina pokazala slabšo korozijsko odpornost v primerjavi z neobdelano površino. Glavna razloga za korozijo sta med krtačenjem poškodovan oksidni sloj in slaba repasivacija po krtačenju. Dodatno so lahko k pojavu korozije prispevali še deformacijski martenzit, delta ferit in ostanki delcev železa na površini. Posledica slabše korozijske odpornosti je pojav jamičaste korozije v vlažnem, slanem okolju. Za zmanjšanje možnosti pojava jamičaste korozije bi bila bolj primerna izbira nerjavnega jekla AISI 316, ki je legirano z molibdenom in s tem bolj odporno proti pojavu jamičaste korozije.

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2011 http://rightsstatements.org/vocab/InC/1.0/ application/pdf text/plain application/xml info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-JUF3GRNH http://www.dlib.si/details/URN:NBN:SI:doc-JUF3GRNH slv Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/contributionToPeriodical Materiali in tehnologije:

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2012 Dolić, Natalija Medved, Jože Mrvar, Primož Unkić, Faruk http://rightsstatements.org/vocab/InC/1.0/ application/html application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-GDUOZCIP http://www.dlib.si/details/URN:NBN:SI:doc-GDUOZCIP eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Influence of the cooling rate on the microstructure development of the EN AW-AlMg4.5Mn0.7 alloy: Vpliv ohlajevalne hitrosti na razvoj mikrostrukture v zlitini EN AW-AlMg4,5Mn0,7:

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2000 Grešovnik, Ferdinand http://rightsstatements.org/vocab/InC/1.0/ application/html application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-1V0BX1O9 http://www.dlib.si/details/URN:NBN:SI:doc-1V0BX1O9 slv Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Vpliv kemijske sestave in toplotne obdelave na lastnosti feritnega nerjavnega jekla za magnetne ventile: The influence of chemical composition and heat treatment on the properties of a ferritic stainless steel for magnetic valves: In addition to the corrosion resistance and mechanical properties, the magnetic properties of the steels used for the closing elements of magnetic valves are the most important. Maximum permeability and minimum coercitivity are required. The latter is especially important in the case of magnetic valves controlled by an ac electric current. In the case of steel with 17% Cr and 0.4% Mo we have studied laboratory heats which must have the content of Si and Mn in the correct range to obtain the lowest coercitivity. The best method of annealing was determined in order to obtain a steep magnetization curve. It was established that the sequence of machining and heat treatment is very important. Resistance against intergranular corrosion was proved. Poleg kemijske odpornosti in mehanskih lastnosti so pri jeklih za zaporne elemente magnetnih ventilov najpomembnejše magnetne lastnosti. Zaželena je čim večja permeabilnost in majhna koercitivnost. Slednje še posebej velja za magnetne ventile, ki jih krmilimo z izmeničnim električnim tokom. Pri jeklu s 17% Cr in 0,4% Mo smo z laboratorijskimi talinami preizkušali, kakšna mora biti v okviru predpisane kemijske sestave vsebnost Si in Mn, da bo koercitivnost čim manjša. Določili smo optimalni režim žarjenja za doseganje strme magnetilne krivulje. Ugotovili smo, da je zelo pomemben vrstni red mehanske in toplotne obdelave. S preizkusom je bila preverjena odpornost jekla proti interkristalni koroziji.

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2012 Bončina, Tonica Čekada, Miha Gselman, Peter Kek-Merl, Darja Panjan, Peter Zupanič, Franc http://rightsstatements.org/vocab/InC/1.0/ application/html application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-J9G7VALH http://www.dlib.si/details/URN:NBN:SI:doc-J9G7VALH eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Characterization of defects in PVD TiAlN hard coatings: Karakterizacija defektov PVD TiAlN trdih prevlek: PVD trde prevleke pridobivajo pomen na različnih področjih uporabe. Pri različnih aplikacijah so pogosto izpostavljene korozijskemu okolju. Trde prevleke so kemijsko inertne in same po sebi korozijsko obstojne. Med njihovo pripravo pa nastane v njih veliko defektov (kraterji, "pinholi"). Nekateri od njih segajo do podlage. Na teh mestih pride do jamičaste korozije, kar pa je z vidika uporabe neželeno. TiAlN-prevleko smo nanesli na podlago orodnega jekla D2 po postopku naprševanja z neuravnoteženim magnetronskim izvirom. Defekte, ki so nastali med pripravo plasti, smo preučili po korozijskem preizkusu. Za analizo smo uporabili dve metodi. Vrstični elektronski mikroskop(SEM), s katerim smo pridobili splošni pregled prevleke, kot tudi 2D-karakterizacijo defektov. Kot drugo metodo smo uporabili fokusiran ionski curek, ki je integriran v klasični SEM, s katerim smo izvedli serijo rezov izbranih defektov za njihovo 3D-karakterizacijo. V delu smo poskušali na specifičnih mestih ugotoviti mehanizem nastanka defektov in ugotovljali, ali povzročajo jamičasto korozijo. PVD hard coatings are continuously gaining their importance in different fields of applications. In industrial use, they are often exposed to corrosive environments. Hard coatings possess inherently good corrosion resistance, but the substrate-hard coating systems may suffer from a severe corrosion attack due to the defects (craters, pin holes) in the coatings. On the sites, where defects extend through the coating, pitting corrosion can take place. These sites are drawbacks in the applications of hard coating. A PVD TiAlN hard coating was prepared on cold-work, tool-steel (AISI D2) substrates by sputtering using unbalanced magnetron sources. The growth defects incorporated into the coating were studied after the deposition and corrosion experiments. We used two methods: (1) scanning electron microscopy (SEM) for general overview of the coating topography and 2D-characterization of defects, and (2) scanning electron microscopy with a focused ion beam (SEM-FIB) for making serial cross-sections through the selected defects in order to provide images for a 3D-reconstruction of defects. In this work we tried to investigate the formation of a defect at a specific location and findout whether the selected defect causes pitting corrosion.

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2013 Bhattacharya, Bhaskar Saxena, Amit Singh, Pramod Kumar http://rightsstatements.org/vocab/InC/1.0/ application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-ILZ4F69Z http://www.dlib.si/details/URN:NBN:SI:doc-ILZ4F69Z eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Structural, optical and electrical studies on Si-doped polymer electrolytes: Študij strukture, optične in električne lastnosti elektrolitov polimerov, dopiranih s Si: In this paper we have studied the modification of the structural, optical and electrical properties of a polymer electrolyte film of polyethylene oxide complexed with sodium iodide (PEO:NaI) by doping with Si particles. Structural studies were carried out using Fourier-transform infrared spectroscopy (FTIR) and X-ray diffraction (XRD) measurements. The surface morphology of the polymer electrolyte film doped with Si particles was studied using polarized optical microscopy (POM). For the electrical properties, the electrical conductivity of the films was measured using complex impedance spectroscopy. The ionic transference number measurement (tion) was carried out and explained in detail to support the electrical conductivity data. V tem članku smo preučevali spremembe strukture, optičnih in električnih lastnosti polimernih elektrolitskih plasti polietilen oksida, kompleksiranega z natrijevim iodidom (PEO:NaI) po dopiranju z delci Si. Študij strukture je bil opravljen z uporabo infrardeče spektroskopije s Fourierjevo transformacijo (FTIR) in z rentgensko difrakcijo (XRD). Morfologija površine tanke plasti polimernega elektrolita, dopiranega z delci Si, je bila preučevana s svetlobno mikroskopijo s polarizirano svetlobo (POM). Od električnih lastnosti je bila izmerjena električna prevodnost plasti s kompleksno impedančno spektroskopijo. Izvršeno in razloženo je bilo merjenje številke ionske transference (tion), ki prispeva k podatkom o električni prevodnosti.

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2014 Bažan, Jiří Machovčák, Pavel Morávka, Jan Opler, Aleš Socha, Ladislav Styrnal, Petr Trefil, Antonín http://rightsstatements.org/vocab/InC/1.0/ application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-DMS2FNJE http://www.dlib.si/details/URN:NBN:SI:doc-DMS2FNJE eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Evaluation of the slag regime and desulphurization of steel with synthetic slag containing Cr2O3: Ocena načina delovanja in razžveplanje jekla s sintetično žlindro s Cr2O3:

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2015 Calleja, Wilfrido Castano, Víctor M. De la Hidalga Wade, Francisco Javier Galindo, Margarita López, Francisco Palomino-Merino, Rodolfo Zúniga, Carlos http://rightsstatements.org/vocab/InC/1.0/ application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-IARQGFIA http://www.dlib.si/details/URN:NBN:SI:doc-IARQGFIA eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Boron-doped hydrogenated amorphous semiconductor MEMS: Z borom dopirani hidrogenirani amorfni polprevodnik MEMS:

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2017 Fenclová, Nela Fíla, Tomáš Gantar, Ana Koudelka, Petr Kumpová, Ivana Kytýř, Daniel Novak, Saša Zlámal, Petr http://rightsstatements.org/vocab/InC/1.0/ application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-GYKTOILQ http://www.dlib.si/details/URN:NBN:SI:doc-GYKTOILQ eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Time-lapse micro-tomography analysis of the deformation response of a gellan-gum-based scaffold: Mikrotomografska analiza s časovnim zamikom odziva deformacije ogrodja iz gelanskega gumija:

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2000 Praunseis, Zdravko Toyoda, Masao http://rightsstatements.org/vocab/InC/1.0/ application/html application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-LHYTTN3Y http://www.dlib.si/details/URN:NBN:SI:doc-LHYTTN3Y slv Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Študij razpokljivosti v hladnem v večvarkovnem varu, grajenem s postopkom varjenja pod praškom: A study of the cold cracking in multi-pass weld metal made by a submerged-arc welding process: One of the weldability problems with HSLA steels is the cold cracking phenomenon. In this research special attention has been paid to cold cracks appearing in the multi pass weld metal. Cold cracking is prevented by the preheating of steel prior to welding in order to achieve a beneficial microstructure, and by the drying of the welding flux and the post heating of a welded joint for the expulsion of dissolved hydrogen. An accurate determination of the preheating temperature is necessary because of the high cost of the preheating during the build up of a welded structure. This paper deals with the experimental determintion of the preheating temperature for multi-pass weld metal with a thickness of 50 mm at which cold crcking in the welded joint could be eliminated. Problematika varivosti malolegiranih konstrukcijskih jekel se kaže tudi v fenomenu razpokljivosti v hladnem. V raziskavi je namenjena posebna pozornost nastajanju razpok v hladnem v večvarkovnem strjenem varu. Razpokljivost v hladnem v strjenem varu preprečujemo s predgrevanjem, za zagotovitev ustrezne mikrostrukture, s sušenjem oplaščenih elektrod ali praškov in s pogrevanjem zvrnega spoja za izhajanje raztopljenega vodika. Ker predgrevanje pomeni visok strošek pri gradnji zvarjene konstrukcije, je potrebna natančna določitev ustrezne temperature predgrevanja. V raziskavi je predstavljena eksperimentalna določitev temperature predgrevanja večvarkovnega strjenega vara debeline 50 mm, pri kateri ne bo prišlo do pojava razpok v hladnem. Ugotovljeno je, da nastanejo prečne razpoke v hladnem v večvarkovnem strjenem varu, grajenem s polnjeno žico Filtub 128 po postopku varjenja pod praškom (EPP postopek)pri temperaturi predgrevanja, ki je nižja od 7O °C.

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2016 Danyali, Daryoush Ranjbarnodeh, Eslam http://rightsstatements.org/vocab/InC/1.0/ application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-CGU6M8I7 http://www.dlib.si/details/URN:NBN:SI:doc-CGU6M8I7 eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Numerical and experimental investigation of the effect of hydrostatic pressure on the residual stress in boiler-tube welds: Numerična in eksperimentalna preiskava vpliva hidrostatičnega tlaka na zaostale napetosti v zvaru na kotlovski cevi:

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2000 Godec, Matjaž Jenko, Monika http://rightsstatements.org/vocab/InC/1.0/ application/html application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-1QT7BBXP http://www.dlib.si/details/URN:NBN:SI:doc-1QT7BBXP eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Presentation methods of textures measurements: Načini predstavitve teksturnih meritev: The microstructure of materials is usually described by size coordinates - xyz, reflecting the size, shape and the arrangement of the microstructural elements and by angular coordinates - ?$\theta$?1 fi ?$\theta$?2, which show the texture. Texture is defined as the orientation distribution of crystallites ina polycrystalline material and results from many kinds of anisotropic solid-state process which can affect the material's anisotropic properties. The texture can either be measured grain-by-grain or by diffraction from the crystalline material, with the majority of all texture studies being performed by X-ray diffraction. The function f(g), which describes the volume fraction of grains with a particular orientation g is discussed. In metallic materials the main features of texture are described by using adequate solutions of the three-dimensional orientation distribution function (ODF), which is usually calculated from two-dimensional X-ray pole figures. In the ODF the whole volume fraction of the crystals having a particular orientation is quantitatively described. The interpretation of the full ODF is difficult for a non-specialist and many not always be the most suitable way of presenting the texture; but it does allow the identification of texture fibres, their quantitative analysis, as well as the selective projection and plot of characteristic orientation fibres. Different methods for the presentation of textures are compared and discussed using the development of Goss and cube texture in electrical steel alloyed with Sn and Sb as an example. Mikrostrukturo materiala opišemo s koordinatami - xyz (velikost, oblika in razporeditev mikrostrukturnih elementov) in s kotnimi koordinatami - ?$\theta$?1 fi ?$\theta$?2 (ki opredeljujejo kristalografsko orientacijo v prostoru, teksturo). Tekstura je orientacijska porazdelitev kristalnih zrn v polikristalnem vzorcu. Pri vseh anizotropnih procesih v trdnem nastane tekstura, ki ima za posledico anizotropijo lastnosti materiala. Teksturo opredelimo z določanjem orientacije posameznih zrn ali z uklonom rentgenske svetlobe na polikristalnem vzorcu. Večina vseh teksturnih meritev je narejena z rentgensko uklonsko metodo (XRD - X-ray diffraction). Opisana je funkcija f(g), ki podaja volumski delež zrn z orientacijo g. S presekom tridimenzionalne orientacijske porazdelitvene funkcije (ODF), ki se ponavadi izračuna iz dvodimenzionalnih polovih figur, se lahko v primeru kovinskih materialov jasno in natančno opišejo glavne značilnosti določenega tipa teksture. Celotno ODF-funkcijo je zelo nerodno prikazovati, poleg tega pa je njena interpretacija zelo zahtevna. Omogoča identifikacijo teksture vlaken, kvantitativno analizo teksture, selektivno projekcijo in slike karakterističnih orientacijskih vlaken. Prikazani so različni načini predstavitve tekstur pri razvoju Gossove in kubične teksture v elektropločevini, legirani s Sn in Sb.

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2017 Chen, Xiu-Li Gao, Hairong Sun, Hai-Jie Wang, Shaoqing Zhao, Ai-Juan Zhao, Guoxin http://rightsstatements.org/vocab/InC/1.0/ application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-KD4AYMO1 http://www.dlib.si/details/URN:NBN:SI:doc-KD4AYMO1 eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Phase-transformation behavior and micromechanical properties of a dual-phase steel after chemical modifications: Fazne spremembe in mikromehanske lastnosti dvofaznih jekel po kemijskih prilagoditvah:

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2010 Kosec, Ladislav Lampič, Marko Markoli, Boštjan Štrekelj, Neva http://rightsstatements.org/vocab/InC/1.0/ application/html application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-AHD3UYPM http://www.dlib.si/details/URN:NBN:SI:doc-AHD3UYPM eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Metallographic characterization of the joining part for the EN 10216-1 and EN 10083-3 made with different consumables: Metalografska karakterizacija veznega člena iz EN 10216-1 in EN 10083-3, izdelanega z različnimi dodajnimi materiali:

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2008 Pedraza, Fernando http://rightsstatements.org/vocab/InC/1.0/ application/html application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-5NVJXNXT http://www.dlib.si/details/URN:NBN:SI:doc-5NVJXNXT eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Low energy-high flux nitridation of metal alloys: mechanisms, microstructures and high temperature oxidation behaviour: mehanizmi, mikrostrukture in visokotemperaturno oksidacijsko vedenje: Nitriranje kovinskih zlitin s fluksom z majhno energijo in veliko gostoto:

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2011 Altin, Mustafa Cogurcu, Mustafa Tolga Donduren, Mahmet Sami Kamanli, Mehmet http://rightsstatements.org/vocab/InC/1.0/ application/html application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-CY5KU6WU http://www.dlib.si/details/URN:NBN:SI:doc-CY5KU6WU eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Experimental study of some masonry-wall coursework material types under horizontal loads and their comparison: Eksperimentalna raziskava zgradbe nekaterih zidarskih zidov - vodoravna obremenitev in primerjava uporabljenih materialov:

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2009 Berginc, Boštjan Brezočnik, Miran Kampuš, Zlatko Šuštaršič, Borivoj http://rightsstatements.org/vocab/InC/1.0/ application/html application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-JWHBJRB1 http://www.dlib.si/details/URN:NBN:SI:doc-JWHBJRB1 eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article A numerical simulation of metal injection moulding: Numerične simulacije brizganja kovinskih prašnatih materialov: Metal injection moulding (MIM) is already a well-established and promising technology for the mass production of small, complex, near-net-shape products. The dimensions and mechanical properties of MIM products are influenced by the feedstock characteristics, the process parameters of the injection moulding, as well as the debinding and the sintering. Numerical simulations are a very important feature of the beginning of any product or technology development. In the article two different techniques for measuring the rheological properties of MIM feedstocks are presented and compared. It was established that capillary rheometers are more appropriate for MIM feed stocks, while on the other hand, parallel-plate rheometers are only suitable for shear rates lower than 10 ssup{-1}. Later on we used genetic algorithms to determine the model coefficients for some numerical simulation software. The results of the simulation of the filling phase and a comparison with the experimental results are presented in the article. Brizganje kovinskih prašnatih materialov (MIM) je uveljavljena tehnologija, primerna za izdelavo majhnih, kompleksnih izdelkov visoke natančnosti. Dimenzije in mehanske lastnosti MIM-izdelkov so odvisne od lastnosti mešanic, procesnih parametrov brizganja, odstranjevanja veziva in sintranja. Numerične simulacije so pri razvoju novih izdelkov oziroma tehnologij zelo pomembne. V prispevku je narejena primerjava in predstavitev dveh metod za merjenje reoloških lastnosti MIM mešanic. Ugotovljeno je bilo, da je kapilarni reometer primernejši za meritve pri višjih strižnih hitrostih, medtem ko je reometer z vzporedno ploščo primeren le za strižne hitrosti do 10 sna{-1}. V nadaljevanju je bila uporabljena metoda genetskih algoritmov za določitev koeficientov matematičnega modela, ki se uporablja v programski opremi za numerične simulacije brizganja. Na koncu so predstavljeni rezultati simulacije polnjenja orodne votline, narejena pa je tudi primerjava z eksperimentalnimi rezultati.

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2017 Oven, Primož Poljanšek, Ida Švara Fabjan, Erika Žepič, Vesna http://rightsstatements.org/vocab/InC/1.0/ application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-LLS6EXXO http://www.dlib.si/details/URN:NBN:SI:doc-LLS6EXXO slv Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Vpliv dodatka nanofibrilirane celuloze na mehanske lastnosti poli(3-hidroksibutirata): The impact of the nanofibrillated-cellulose addition on the mechanical properties of poly(3-hydroxybutyrate):

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2012 Aytar, Omer Baris Calik, Adnan Ucar, Nazim http://rightsstatements.org/vocab/InC/1.0/ application/html application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-E0OLQLP8 http://www.dlib.si/details/URN:NBN:SI:doc-E0OLQLP8 eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Temperature behaviour of the boride layer of a low-carbon microalloyed steel: Temperaturno vedenje boridnega sloja na maloogljičnem mikrolegiranem jeklu: In this work, the boronizing of low-carbon microalloyed steels was carried out in a solid medium using the powder-pack method. After boronizing, a boride layer and the presence of both FeB and Fe2B phases in the boride layer were revealed with classic metallographic techniques and X-ray diffraction (XRD) analysis. The presence and distribution of alloying elements on the boride phases was measured using glow-discharge optical emission spectrometry (GDOES) and the distance between the surface and the substrate was taken as the layer thickness. It was found that higher boronizing temperatures resulted in an increase in the layer thickness, from 7 mum to 105 mum. In addition, microhardness tests of the boronized steel samples showed a significant increase in the surface hardness caused by the increased boronizing temperature. The boride layer had a hardness of over 910 HV0.1 and 1320 HV0.1 for 973 K and 1273 K, respectively, while the substrate's hardness was approximately 145 HV0.1. Kinetic studies showed that the diffusion process is thermally activated, with the mean value of the activation energy being close to 194 kJ/mol. To delo obravnava boriranje maloogljičnega mikrolegiranega jekla v trdnem mediju z uporabo metode zasutja v prah. Po boriranju je bila v boridnem sloju odkrita prisotnost FeB in Fe2B s klasično metalografijo in z rentgensko difrakcijsko (XRD) analizo. Po drugi strani pa je bila izmerjena prisotnost in razporeditev legirnih elementov v boridni fazi z obločno razelektritveno optično emisijsko spektrometrijo (GDOES) in razdalja od površine do podlage pomeni debelino plasti. Ugotovljeno je bilo, da višanje temperature boriranja poveča debelino sloja od 7 mim do 105 mim. Dodatno so preizkusi mikrotrdote boriranih vzorcev jekla pokazali občutno povečanje trdote površine boriranih vzorcev s povišanjem temperature boriranja. Boridni sloj je imel trdoto več kot 910 HV0,1 in več kot 1320 HV0,1 pri 973 K oziroma 1273 K, medtem ko je bila trdota podlage okrog 145 HV0,1. Študij kinetike je pokazal, da je difuzijski proces toplotno aktiviran, povprečna vrednost aktivacijske energije pa je bila blizu 194 kJ/mol.

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2017 Kroupa, Tomáš Lukeš, Vladimir Srbová, Hana http://rightsstatements.org/vocab/InC/1.0/ application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-CEWE9XOF http://www.dlib.si/details/URN:NBN:SI:doc-CEWE9XOF eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Comparison of homogenization approaches used for the identification of the material parameters of unidirectional composites: Primerjava homogenizacijskih približkov za ugotavljanje parametrov materiala enosmernih kompozitov:

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2009 Belič, Igor http://rightsstatements.org/vocab/InC/1.0/ application/html application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-G1AOWOGQ http://www.dlib.si/details/URN:NBN:SI:doc-G1AOWOGQ eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article The pseudo-gradient algorithm for residual gas analysis: Psevdogradientna metoda za analizo masnih spektrov: The article focuses on a special approach to the qualitative and quantitative residual gas analysis of a vacuum-chamber atmosphere. The main outline of mass-spectrometry usage is given together with a brief comparison of two completely different scientific fields. The new approach, where the mass spectra are formalized in a vector annotation, to residual gas analysis is proposed. The main problem with residual gas analysis based on a mass spectrum is its ambiguity, which cannot be easily resolved. One way to deal with the problem is practical knowledge about the interpretation of mass spectra. The pseudo-gradient algorithm for mass-spectra analysis was developed and tested. The general testing platform was developed and the algorithm was tested within it. The presented work is the foundation for a comprehensive study of mass-spectrum analysis techniques. An important concept is the virtual environment that provides the mass-spectrum generator, the standard fragmentation patternsć database, the data space for the various algorithms that can test various approaches to the mass-spectrum analysis, and the database of the achieved results, which is necessary for the comparison of different algorithms and represents the backbone for the dynamic mass-spectra generation and analysis. V prispevku je opisan nov način kvalitativne in kvantitativne analize rezidualnih plinov atmosfere v vakuumskem sistemu. Uvodoma je podan pregled različnih vrst uporabe masne spektrometrije, skupaj s pregledom dveh povsem različnih znanstvenih področij. Prikazan je nov način, ki pojmuje masne spektre v formalni vektorski obliki. Osnovni problem pri analizi masnih spektrov, ki ga ni mogoče enostavno rešiti, je njihova večličnost. Ena od možnosti je uvedba praktičnih izkušenj, ki algoritmu pomaga pri razrešitvi nekaterih dvoumij. Razvita in analizirana je psevdo-gradientna metoda za rezidualno analizo plinov iz masnega spektra. Razvito je bilo preizkusno okolje, v katerem je bil analiziran algoritem. Predstavljeno delo je temelj za široko študijo tehnik za analizo masnih spektrov. Pomemben koncept je virtualno okolje, ki vsebuje generator masnih spektrov, podatkovno bazo standardnih masnih spektrov, podatkovni prostor za hranjenje rezultatov preizkusov algoritmov, ki so nujni za kasnejšo primerjavo delovanja posameznih algoritmov. Virtualno okolje je tudi temelj za kasnejšo dinamično analizo masnih spektrov.

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2014 Dobrovská, Jana Dobrovský, Ludovít Dudek, Rostislav Rosypalová, Silvie Žaludová, Monika http://rightsstatements.org/vocab/InC/1.0/ application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-DYBGVQAA http://www.dlib.si/details/URN:NBN:SI:doc-DYBGVQAA eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Interfacial tension at the interface of a system of molten oxide and molten steel: Medfazna napetost na stiku staljen oksidni sistem - staljeno jeklo: This paper is focused on a study of the interfacial tension between selected oxide and metal phases. The experimental research on the interfacial tension was performed in a horizontal resistive graphite Tamman furnace using an original method of measuring. This method consists of fixing both liquid phases in a horizontal position using a mandrel made of tungsten wire in a corundum cover. In this work the influence of the carbon content in the steel on the interfacial tension was studied. For this purpose a steel with 0.411 % of mass fraction of carbon and a steel with 2.64 % of carbon were used. Because of the wide variety of oxide systems used in industry, a characteristic system of casting powder was chosen for this study. This system contains dominant components, i.e., SiO2, CaO, Al2O3 and MgO, as well as a range of attendant mixtures, e.g., Fe2O3, TiO2 and Na2O. Simultaneously, the influence of SiO2 on the temperature dependence of the interfacial tension was observed. For this reason a concentration series with gradual additions of SiO2 was created. It was found that an increasing content of carbon in the steel significantly decreases the interfacial tension between the oxide system and the steel. The interfacial tension was found to decrease slightly with an increase in the content of SiO2 in the oxide system. Članek predstavlja študijo medfazne napetosti med izbranim oksidom in kovinsko fazo. Določanje medfaznih napetosti je bilo izvršeno z originalno metodo v horizontalni uporovni grafitni Tammanovi peči. Ta metoda sestoji iz zadržanja obeh talin v horizontalnem položaju s trnom iz volframove žice in korundnega pokrova. V tem delu je bil preučevan vpliv ogljika v jeklu na medfazno napetost. Uporabljeno je bilo jeklo z masnim deležem 0,411 mas. % ogljika in jeklo z 2,64 % ogljika. Zaradi velike raznolikosti oksidnih sistemov, ki se uporabljajo v industriji, je bil za študij izbran livni prašek. Ta vsebuje glavne komponente, ki so SiO2, CaO, Al2O3 in MgO, ter vrsto primesi, kot so na primer Fe2O3, TiO2 in Na2O. Hkrati je bil opažen vpliv SiO2 na temperaturno odvisnost medfazne napetosti. Zato je bila pripravljena serija z naraščajočo vsebnostjo SiO2. Ugotovljeno je, da naraščanje vsebnosti ogljika v jeklu občutno zmanjša medfazno napetost med oksidnim sistemom in jeklom. Za medfazno napetost je ugotovljeno, da se nekoliko zmanjša, če se povečuje vsebnost SiO2 v oksidnem sistemu.

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2013 Bednářová, Vlasta Beňo, Jaroslav Špirutová, Nikol http://rightsstatements.org/vocab/InC/1.0/ application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-MP8E88YX http://www.dlib.si/details/URN:NBN:SI:doc-MP8E88YX eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Alternative utilization of the core sand for a green-sand system: Alternativna uporaba peska za jedra v sistemu priprave livarskega peska: The foundry industry, like the other human activities, is associated with the production of various wastes. These secondary products of manufacturing are mainly composed of the moulding mixture, dust waste, fire-refractory materialsand other wastes. A utilization of the waste moulding mixture, especially the core sand based on organic resins, as a replacement for new sand, can be a way of decreasing the portion of moulding-mixture waste, thus also decreasing its negative impact on the environment. Nowadays, the most preferred technology for manufacturing moulds is the green-sand system with clay (bentonite) as the binder. The aim of this study is to determine the influence of a core-sand addition on the mechanical, physical, chemical and technological properties of the green-sand system. Livarska industrija je kot vse človeške aktivnosti povezana z nastankom različnih odpadkov. Odpadki, ki nastajajo pri proizvodnji, so večinoma sestavljeni iz mešanice form, prahov, ognjevzdržnih materialov in drugih odpadkov. Uporaba odpadnih mešanic iz form, kot nadomestilo za nov pesek, posebno mešanic za jedra, ki temeljijo na organskih vezivih, je lahko pot za zmanjšanje količine odpadnega peska, s čimer se lahko zmanjša negativni vpliv na okolje. Dandanes je najbolj priljubljena tehnologija za izdelavo form sistem z novim peskom in glino (bentonit) za vezivo. Namen te študije je ugotoviti vpliv dodatka peska jeder na mehanske, fizikalno-kemijske in tehnološke lastnosti peščene mešanice.

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2014 Gunes, Ibrahim http://rightsstatements.org/vocab/InC/1.0/ application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-GXPFAWMZ http://www.dlib.si/details/URN:NBN:SI:doc-GXPFAWMZ eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Tribological behavior and characterization of borided cold-work tool steel: Tribološko vedenje in karakterizacija boriranega orodnega jekla za delo v hladnem: In the present study, tribological and characterization properties of the borides formed on cold-work tool steel were investigated. Boriding was performed in a solid medium consisting of Ekabor-II powders at 850 °C and 950 °C for 2 h and 6 h. The boride layer was characterized with light microscopy, X-ray diffraction technique and a micro-Vickers hardness tester. An X-ray diffraction analysis of the boride layers on the surface of the steel revealed the existence of FeB, Fe2B, CrB, Cr2B and MoB compounds. Depending on the chemical compositions of the substrates and the boriding time, the boride-layer thickness on the surface of the steel ranged from 13.14 micro m to 120.82 micro m. The hardness of the boride compounds formed on the surface of the steel ranged from 1806 HV0.05 to 2342 HV0.05, whereas the Vickers-hardness value of the untreated steel was 428 HV0.05. The wear tests were carried out in a ball-disc arrangement under a dry friction condition at room temperature with an applied load of 10 N and with a sliding speed of 0.25 m/s at a sliding distance of 1000 m. The wear surfaces of the steel were analyzed using SEM microscopy and X-ray energy-dispersive spectroscopy (EDS). It was observed that the wear rate of the unborided and borided cold-work tool steels ranged from 11.28 mm3/(N m) to 116.54 mm3/(N m). V tej študiji so bile preiskovane tribološke in druge značilne lastnosti boridov, nastalih na orodnem jeklu za delo v hladnem. Boriranje je bilo izvršeno v trdnem mediju, ki ga je sestavljal prah Ekabor-II pri 850 °C in 950 °C v 2 h in 6 h. Boriran sloj je bil preiskan s svetlobno mikroskopijo, rentgensko difrakcijo in izmerjena je bila Vickersova mikrotrdota. Rentgenska difrakcija boriranega sloja na površini jekla je potrdila prisotnost spojin FeB, Fe2B, CrB, Cr2B in MoB. Odvisno od kemijske sestave podlage in časa boriranja je bila debelina boriranega sloja na površini jekla med 13,14 mikro m in 120,82 mikro m. Trdota boridov, nastalih na površini jekla, je bila v razponu od 1806 HV0,05 do 2342 HV0,05, medtem ko je bila Vickersova trdota neobdelanega jekla 428 HV0,05. Preizkusi obrabe so bili izvršeni na napravi krogla-disk pri suhem trenju pri sobni temperaturi z uporabljeno obtežbo 10 N, hitrostjo drsenja 0,25 m/s in pri razdalji drsenja 1000 m. Površina z obrabo je bila analizirana s SEM-mikroskopijo in energijsko disperzijsko spektroskopijo rentgenskih žarkov (EDS). Ugotovljeno je bilo, da je hitrost obrabe neboriranega in boriranega orodnega jekla za delo v hladnem v razponu od 11,28 mm3/(N m) do 116,54 mm3/(N m).

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2014 Cagala, Michal Čegan, Tomáš Juřica, Jan Kawulok, Petr Kursa, Miroslav Rusz, Stanislav Vontorová, Jiřina http://rightsstatements.org/vocab/InC/1.0/ application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-M681MWSR http://www.dlib.si/details/URN:NBN:SI:doc-M681MWSR eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Effect of Ti2AlC particles on the microstructure and elevated-temperature-deformation properties of gamma-TiAl alloys: Vpliv delcev Ti2AlC na mikrostrukturo in deformacijske lastnosti zlitin gama-TiAl pri povišani temperaturi: The g-TiAl intermetallics with and without amount fractions x = 0.3 % of yttrium and with different carbon amount fractions ranging from 0.9 % to 1.6 % were prepared by vacuum-induction melting in a graphite crucible. Different amounts of carbon were obtained by varying the time of melting. The resulting samples had large rod-like carbides with volume fractions 0.6 % to 3.7 % Ti2AlC in the lamellar matrix consisting of the alternating lamellas of g-TiAl and a2-Ti3Al phases. It was found that the grain size of the matrix decreases with the increasing volume fraction of Ti2AlC carbides from 430 %m to 35 %m. In addition, finer carbides with a similar composition were observed. Their size was below 1 %m and they appear mainly at the grain boundaries and also inside the lamellar grains. Compression testing revealed that all the samples had a relatively high yield strength at elevated temperature, from 917 MPa to 623 MPa at 600 °C and from 608 MPa to 547 MPa at 800 °C, but the best strength and the best yield strength were found for the sample with the lowest amount of the large rod-like Ti2AlC carbides. From these results it is concluded that the strengthening at an elevated temperature is a result of C in the solid solution and small carbide precipitates rather than of the rod-like Ti2AlC carbides. Intermetalne zlitine g-TiAl z množinskim deležem itrija x = 0,3 % in brez njega ter z različno vsebnostjo množinskega deleža ogljika od 0,9 % do 1,6 % so bile izdelane z vakuumskim indukcijskim pretaljevanjem v grafitnem lončku. Različne vsebnosti ogljika so bile dobljene pri različnih časih taljenja. Dobljeni vzorci so imeli volumenski delež Ti2AlC od 0,6 % do 3,7 % velikih paličastih karbidov v lamelarni osnovi iz lamel faz g-TiAl in a2-Ti3Al. Ugotovljeno je bilo, da se z večanjem volumenskega deleža Ti2AlC-karbidov velikost zrn osnove zmanjšuje od 430 %m do 35 %m. Opazilo se je tudi, da imajo drobnejši karbidi podobno sestavo. Njihova velikost je manjša od 1 %m, pojavljajo se večinoma po mejah zrn in tudi v lamelarnih zrnih. Tlačni preizkus je odkril, da imajo vsi vzorci relativno visoko mejo tečenja pri povišanih temperaturah: od 917 MPa do 623 MPa pri 600 °C in od 608 MPa do 547 MPa pri 800 °C. Najvišjo trdnost in najvišjo mejo tečenja je imel vzorec z najmanjšo vsebnostjo velikih, paličastih Ti2AlC-karbidov. Iz rezultatov je razvidno, da je utrjevanje pri povišanih temperaturah bolj posledica ogljika v trdni raztopini in drobnih karbidnih izločkov kot pa velikih paličastih Ti2AlC-karbidov.

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2005 Asanović, Vanja Delijić, Kemal Radonjić, Dragan http://rightsstatements.org/vocab/InC/1.0/ application/html application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-KDSUVWQU http://www.dlib.si/details/URN:NBN:SI:doc-KDSUVWQU eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article The influence of the extrusion process and heat treatment on the properties of some AA6XXX extruded profiles:

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2015 http://rightsstatements.org/vocab/InC/1.0/ application/pdf text/plain application/xml info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-FB3LAY3T http://www.dlib.si/details/URN:NBN:SI:doc-FB3LAY3T slv Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/contributionToPeriodical Materiali in tehnologije:

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2012 Gostimirović, Marin Hadžistević, Miodrag Pejić, Vlastimir Sekulić, Milenko Turisova, Renata http://rightsstatements.org/vocab/InC/1.0/ application/html application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-87R0PJRI http://www.dlib.si/details/URN:NBN:SI:doc-87R0PJRI eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Influence of material properties on the machinability in face milling: Vpliv lastnosti materiala na obdelovalnost pri čelnem rezkanju: A workpiece material and its mechanical properties, chemical composition and microstructure have a significant influence on the material machinability in machining, i.e., on the machining-process output properties: productivity, machined surface quality and machining accuracy. Machinability improves when equal conditions are achieved: long tool life, increased productivity, better machined surface quality, lower forces and cutting temperatures, as well as favourable chip type. Cutting-process planning requires reliable cutting-force estimates, which can be currently obtained only from process-dependent machinability databases. This paper described research in the field of cutting forces in the face milling of eight different materials: steels C45 and C60, gray irons GJL150 and GJL200, silumine AlSi12Cu.00, copper EK2-Cu.00, bronze CuSn12.01 and brass CuZn40Pb.05. The results showed that the hardness, tensile-strength values, chemical composition and microstructure of a workpiece material have a significant influence on the main cutting force, and thereby on the cutting energy in machining. Material obdelovanca in njegove mehanske lastnosti, kemična sestava in mikrostruktura pomembno vplivajo na obdelovalnost materiala pri obdelavi ter na zmogljivosti procesa obdelave, kot so: produktivnost, kakovost obdelane površine in natančnost obdelave. Obdelovalnost se izboljša, če so zagotovljeni enaki pogoji. To omogoča dolgo trajnostno dobo orodja, večjo produktivnost, boljšo kakovost obdelane površine, manjše sile in nižje temperature pri rezanju ter ugodno obliko ostružkov. Načrtovanje rezalnega procesa zahteva zanesljivo oceno sil pri rezanju, kar je sedaj mogoče doseči le z bazami podatkov procesno odvisne obdelovalnosti. Članek obravnava raziskavo na področju sil pri čelnem rezkanju osmih različnih materialov: jekel C45 in C60, sivih litin GJL150 in GJL200, silumina AlSi12Cu.00, bakra EK2-Cu.00, brona CuSn12.01 in medenine CuZn40Pb.05. Rezultati so pokazali, da imajo trdota, natezna trdnost, kemična sestava in mikrostruktura materiala obdelovanca pomemben vpliv na sile pri rezanju in s tem na rezalno energijo pri obdelavi.

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2015 Jastrzębska, Ilona Kleczyk, Elżbieta Pędzich, Zbigniew Szczerba, Jacek Śnieżek, Edyta http://rightsstatements.org/vocab/InC/1.0/ application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-DYFOAZ1E http://www.dlib.si/details/URN:NBN:SI:doc-DYFOAZ1E eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Preparation of porous ceramic materials based on CaZrO3: Priprava porozne keramike na osnovi CaZrO3:

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2012 Hartomacioglu, Selim Köklü, Ugur Kurt, Mustafa Mutlu, Bilçen http://rightsstatements.org/vocab/InC/1.0/ application/html application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-N4LBN4UE http://www.dlib.si/details/URN:NBN:SI:doc-N4LBN4UE eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Minimization of the surface roughness and form error on the milling of free-form surfaces using a Grey relational analysis: Minimizacija hrapavosti površine in oblikovne napake pri obdelavi prostih površin z uporabo Grey odvisnostne analize: The aim of this paper is to assess an experimental analysis of different tool-path strategies with respect to their influences on surface roughness and dimensional machining errors during free-form surface machining using experimental works. For this purpose, the machining of Al7075-T651 material, which is used in the production of free-form surfaces for the die-sinking sector, in particular, was examined using a ball-end mill in a 3-axis CNC machine. The effects of the tool diameters and of the rough and finished machining strategies on the presence and character of form errors and surface roughness were investigated and the results were optimized using a Grey Relational Analysis. The results obtained from these experiments clearly indicate the influence of tool-path strategies and tool diameters on form errors, as well as the importance of the appropriate strategies for reducing the surface roughness. Namen tega dela je bil ovrednotenje analize različnih strategij orodja s stališča vpliva na hrapavost površine in dimenzijsko napako pri prosto oblikovni obdelavi na podlagi preskusov. S tem namenom je bila raziskana zlitina Al7075-T651, ki se uporablja pri izdelavi prosto oblikovanih površin, predvsem pri poglabljanju utorov, z orodjem s kroglasto glavo na tri osnem CNC stroju. Vplivi strategij premera glave orodja, grobe in končne obdelave na prisotnost in naravo napak in hrapavost površine so bili raziskani in rezultati optimizirani z uporabo Grey odvisnostne analize. Rezultati preskusov jasno kažejo vpliv strategije poti in premera orodja na napako oblike in pomen strategij, primernih za zmanjšanje hrapavosti površine.

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2014 Durmuş, Hülya Gençalp Irizalp, Simge Şahin, Salim Yüksel, Nilay http://rightsstatements.org/vocab/InC/1.0/ application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-B2UVW2YJ http://www.dlib.si/details/URN:NBN:SI:doc-B2UVW2YJ eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Wear behavior of Al/SiC/graphite and Al/FeB/graphite hybrid composites: Vedenje hibridnih kompozitov Al/SiC/grafit in Al/FeB/grafit pri obrabi: Silicon carbide is often the preferred reinforcement in the production of aluminium-powder composites. In this study, aluminium composites were produced with 10 % and 20 % silicon-carbide and ferroboron reinforcements and (0, 0.5, 1 and 1.5) % graphite additions using powder metallurgy. The effects of the reinforcement type, the amount and the graphite content on the wear resistance were investigated. When compared with the unreinforced aluminium sample, it was clear that the increasing reinforcement increased the wear resistance. It was determined that the increasing graphite content negatively affects the wear resistance. The sample including 20 % ferroboron and 0 % graphite showed the minimum wear rate. Silicijev karbid se pogosto uporablja za ojačanje pri proizvodnji aluminijevih kompozitov iz prahov. V tej študiji so bili aluminijevi kompoziti izdelani po metalurgiji prahov, utrjeni z 10 %, 20 % silicijevega karbida, fero-bora in dodatkom (0, 0,5, 1 in 1,5) % grafita. Raziskani so bili vplivi vrste ojačitve, količine ojačitve in količine grafita na odpornost proti obrabi. V primerjavi z neutrjenimi vzorci aluminija je razvidno, da se odpornost proti obrabi povečuje z večanjem utrjevanja. Ugotovljeno je, da povečanje količine grafita negativno vpliva na odpornost proti obrabi. Najmanjšo stopnjo obrabe je pokazal vzorec, ki je vseboval 20 % fero-bora in bil brez grafita.

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2016 Akinlabi, Esther T. Dinaharan, Isaac http://rightsstatements.org/vocab/InC/1.0/ application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-1G7JJF1L http://www.dlib.si/details/URN:NBN:SI:doc-1G7JJF1L eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Influence of the tool rotational speed on the microstructure and joint strength of friction-stir spot-welded pure copper: Vpliv hitrosti vrtenja orodja na mikrostrukturo in trdnost torno vrtilno točkasto zvarjenega spoja čistega bakra:

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2016 Pazdera, Luboš Rovnaník, Pavel Rypák, Peter Timčaková-Šamárková, Kristýna Topolar, Libor http://rightsstatements.org/vocab/InC/1.0/ application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-88IVU2HD http://www.dlib.si/details/URN:NBN:SI:doc-88IVU2HD eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Non-traditional non-destructive testing of the alkali-activated slag mortar during the hardening: Netradicionalno neporušno preizkušanje z alkalijami aktivirane malte med strjevanjem:

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2003 Hogmark, Sture Jacobson, Staffan Podgornik, Bojan http://rightsstatements.org/vocab/InC/1.0/ application/html application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-FIS31K7W http://www.dlib.si/details/URN:NBN:SI:doc-FIS31K7W slv Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Influence of oil additives on the performance of DLC coatings: Vpliv aditivov na tribološke lastnosti prevlek na osnovi trdega ogljika:

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2018 Brulc, Urban Dolinar, Drago Gorenšek, Matevž Jenko, Monika Kocjančič, Boštjan http://rightsstatements.org/vocab/InC/1.0/ application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-2D2YO5B9 http://www.dlib.si/details/URN:NBN:SI:doc-2D2YO5B9 eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Towards the optimum spinal fusion device: V iskanju optimalnega umetnega medvretenčnega vsadka:

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2015 Friedrich, Bernd Majerič, Peter Rudolf, Rebeka http://rightsstatements.org/vocab/InC/1.0/ application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-93QHJJLT http://www.dlib.si/details/URN:NBN:SI:doc-93QHJJLT eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Au-nanoparticle synthesis via ultrasonic spray pyrolysis with a separate evaporation zone: Sinteza nanodelcev zlata z ultrazvočno razpršilno pirolizo z ločeno cono izhlapevanja:

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2013 Akkurt, Iskender Çalik, Adnan Karakaş, Serdar Turhan, Adem Uçar, Nazim http://rightsstatements.org/vocab/InC/1.0/ application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-9E0SLZJ1 http://www.dlib.si/details/URN:NBN:SI:doc-9E0SLZJ1 eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Study on the mechanical and radiation-shielding properties of borided AISI 304 stainless steels: Študija mehanskih lastnosti in zaščitnih sposobnosti nerjavnega jekla AISI 304 pred sevanjem: The boriding effect on the tensile properties, microhardness and radiation shielding has been studied. While boriding increased the hardness of the AISI 304 steel from 240 HV0.1 to the maximum value of 1 740 HV0.1, the elongation and the maximum stress clearly showed decreasing values. Borided specimens were more capable at stopping the high-energy photons and boriding improved the radiation-shielding properties of the AISI 304 steel. From the obtained results, it has been concluded that the borided AISI 304 stainless steel can be used as radiation shielding for g-rays. Preučevan je bil učinek boriranja na natezne lastnosti, mikrotrdoto in zaščitopred sevanjem. Medtem ko boriranje poveča trdoto jekla AISI 304 iz 240 HV0,1 na maksimalno 1740 HV0,1, raztezek in maksimalna napetost izkazujeta padajoče vrednosti. Borirani vzorci so bolj odporni proti zaustavljanju visokoenergijskih protonov. Boriranje jekla AISI 304 poveča zaščito pred sevanjem. Iz dobljenih rezultatov lahko sklenemo, da je jeklo AISI 304 mogoče uporabiti za zaščito pred sevanjem rentgenskih žarkov.

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2003 Kejžar, Rajko Lagoja, Aleš http://rightsstatements.org/vocab/InC/1.0/ application/html application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-GIZEULDN http://www.dlib.si/details/URN:NBN:SI:doc-GIZEULDN slv Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Kvaliteta navarjenih korozijsko obstojnih prevlek na konstrukcijskem jeklu: Quality of surfaced corrosion-resistant deposits on structural steel:

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2000 Kunc, Robert Prebil, Ivan Torkar, Matjaž http://rightsstatements.org/vocab/InC/1.0/ application/html application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-017PA27F http://www.dlib.si/details/URN:NBN:SI:doc-017PA27F slv Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Materiali in nosilnost velikih kotalnih ležajev: Materials and carrying capacity of large rolling bearings: In order to determine the actual carrying capacity of the rolling contact in axial bearings with low speed of rotation, considering base material properties, hardness and thickness of the hardened layer, and the geometry of the contact, have been measured on the models of bearing raceways made of 42CrMo4 and C45 materials (ISO 683/1). The loads were low cycle dynamic. The low cyclic curves and limit of fast increase in deformation gradient have been determined. Simultaneously with the experiment, were checked the sub surface stresses using a FEM model, considering the low cycle material nonlinearities, determined by the experiment. Za določitev nosilnosti kotalnega stika velikih aksialnih ležajev z majhno vrtilno hitrostjo so bile izvedene meritve na modelih ležajnih tečin, izdelanih iz materiala 42CrMo4 in C45 (ISO 683/1). Upoštevana je bila lastnost osnovnega materiala ležajnega obroča, trdota in globina kaljene plasti tečine ter geometrija stika. Obremenjevanje stika je bilo malociklično. Določene so bile malociklične krivulje ter meja in gradient rasti deformacije stika. Istočasno z eksperimentom je bil numerično, z metodo končnih elementov preverjen potek podpovršinskih napetosti. Upoštevane so bile eksperimentalno določene malociklične materialne lastnosti ležajnih obročev.

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2012 Boga, Ahmet Raif Öztürk, Murat Topçu, Ilker Bekir http://rightsstatements.org/vocab/InC/1.0/ application/html application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-ABWOZYYX http://www.dlib.si/details/URN:NBN:SI:doc-ABWOZYYX eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Effect of fly-ash amount and cement type on the corrosion performance of the steel embedded in concrete: Učinek količine letečega pepela in vrste cementa na korozijo jekla v betonu: In this study the corrosion performance of the steel embedded in the concrete produced by using three different types of cement (CEM II/B-M (P-L) 32.5 R, CEM I 42.5 R and CEM I 52.5 R) was investigated. 300 kg/msup3 and 375 kg/msup3 dosages of the cement with (0, 10 and 20) % of fly-ash (FA) replacements of cement were used to produce the concretes. These concretes were cured for 28 d and 180 d. The mechanical properties of the concretes were determined and the corrosion performances of the reinforced-concrete specimens were determined using the impressed voltage test. After the impressed voltage test weight losses occurred because of the corrosion that was determined. The results of this study show that using composite cement and an FA replacement of the cement are useful in combating corrosion. V tej študiji je bilo preiskovano korozijsko vedenje jekla, vgrajenega v beton, izdelan iz treh vrst cementa (CEM II/B-M (P-L) 32,5 R, CEM I 42,5 R in CEM I 52,5 R). Odmerki 300 kg/mna3 in 375 kg/mna3 cementa z (0, 10 in 20) % letečega pepela (FA) kot nadomestila za cement, so bili uporabljeni za izdelavo betona. Beton je bil preskušen po 28 d in po 180 d. Določene so bile mehanske lastnosti betona. Korozijske lastnosti armiranega betona so bile določene s pospešenim korozijskim napetostnim preizkusom. Pri pospešenem napetostnem korozijskem preizkusu se je zaradi korozije pojavilo zmanjšanje mase. Rezultati te študije kažejo, da je za zmanjšanje korozije ugodna uporaba kompozita cementa z letečim pepelom, ki nadomesti cement.

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2012 Brajlih, Tomaž Drstvenšek, Igor Pilipović, Ana Pogačar, Dušan Valentan, Bogdan Zupančič Hartner, Tjaša http://rightsstatements.org/vocab/InC/1.0/ application/html application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-DDOD44NW http://www.dlib.si/details/URN:NBN:SI:doc-DDOD44NW eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Development of a 3D printer for thermoplastic modelling: Razvoj 3D-tiskalnika za termoplastično modeliranje: Additive technologies are entering the market in all price segments and the development of new machines and materials is rapidly growing. Machines under 2000 EUR are more and more interesting for home and educational use. This paper presents the development of a 3D printer that shapes the parts layer by layer by depositing the material on a predefined position. The development is presented from the engineering point of view. The construction steps, the control and the actuator solutions are presented. The ABS plastic was analysed for its material properties. The 3D printer evolved from a prototype to the pre-production phase. Dodajalne tehnologije vstopajo na trg v vseh cenovnih segmentih, razvoj novih naprav in materialov pa je v konstantnem teku. Naprave s ceno pod 2000 EUR so vse bolj zanimive za uporabo doma in v izobraževalne namene. Članek prikazuje razvoj 3D-tiskalnika, ki izdela izdelek s ciljnim nalaganjem materiala na določena mesta posameznega sloja. Prikazan je inženirski pogled na razvoj. Predstavljeni so konstrukcijski koraki in rešitev vodenja. Analizirane so bile lastnosti materiala ABS. Izdelek je prešel prototipno fazo in je sedaj v predproizvodni fazi.

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2014 Böehme, Marcus Frint, Philipp Jirková, Hana Mašek, Bohuslav Vančura, Filip http://rightsstatements.org/vocab/InC/1.0/ application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-ERH7JWFC http://www.dlib.si/details/URN:NBN:SI:doc-ERH7JWFC eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Mini-thixoforming of various modified states of the stock structure of tool steel X210Cr12: Minitikso preoblikovanje orodnega jekla X210Cr12 z različno začetno mikrostrukturo:

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2015 Moholkar, Annasaheb Vitthal Reddy, Katta Narasimha Reddy, Musugu Venkata Ramana Vijayakumar, Yelsani http://rightsstatements.org/vocab/InC/1.0/ application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-DVGOA3ME http://www.dlib.si/details/URN:NBN:SI:doc-DVGOA3ME eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Influence of the substrate temperature on the structural, optical and thermoelectric properties of sprayed V2O5 thin films: Vpliv temperature podlage na strukturne, optične in termoelektrične lastnosti napršene tanke plasti V2O5:

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2009 Arzenšek, Boris Kosec, Gorazd Vodopivec, Franc Vojvodič-Tuma, Jelena http://rightsstatements.org/vocab/InC/1.0/ application/html application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-JTB4SFQZ http://www.dlib.si/details/URN:NBN:SI:doc-JTB4SFQZ eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article The brittle tensile fracture and cleavage strength of a structural steel with a simulated weld-affected-zone microstructure: Trdnost pri krhkem prelomu in cepilna trdnost za konstrukcijsko jeklo s simulirano mikrostrukturo toplotne cone zvara: Tensile tests were carried out on specimens of the same micro-alloyed structural steel after different thermal treatments, with the aim being to obtain the microstructure in a weldćs heat-affected zone. The mechanical properties were determined at a temperature below the brittle threshold transition Charpy temperature, the fracture surfaces were examined, the cleavage strength was deduced and the space orientation of the cleavage facets was determined. No relation was found between the results of the tensile tests and the previously determined Charpy properties after an identical thermal treatment. Opravili smo raztržne preizkuse mikrolegiranege konstrukcijskega jekla, ki je bilo toplotno obdelano za dosego nekaterih mikrostruktur v toplotni zoni zvara. Določili smo mehanske lastnosti pri temperaturi pod pragom krhkega Charpyjevega preloma, pregledali prelomne površine, izračunali cepilno trdnost in določili prostorsko orientacijo cepilnih ploskev. Našli nismo nobene povezave med rezultati te raziskave in značilnostmi Chrapyjevega preloma jekla po enaki toplotni obdelavi.

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2011 Marinšek, Marjan Novosel, Barbara Zupan, Klementina http://rightsstatements.org/vocab/InC/1.0/ application/html application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-ESEMEMHS http://www.dlib.si/details/URN:NBN:SI:doc-ESEMEMHS eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Combustible precursor behaviour in the lanthanum chromite formation process: Termične lastnosti reakcijskega gela za pripravo lantanovega kromita:

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2012 Godec, Matjaž Jenko, Monika Podgornik, Bojan Vodopivec, Franc Žužek, Borut http://rightsstatements.org/vocab/InC/1.0/ application/html application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-6YJ7ZOKF http://www.dlib.si/details/URN:NBN:SI:doc-6YJ7ZOKF eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Calculation of accelerated stationary creep rate activation energy for a steel microstructure with a uniform distribution of carbide particles: Izračun aktivacijske energije za stacionarno hitrost lezenja za jeklo z mikrostrukturo z enakomerno porazdelitvijo karbidnih izločkov: Recent research has shown a dependence of the accelerated creep rate on the carbide particle distribution in martensite, with the creep rate depending on the number of carbide particles per unit of surface and their mutual distance. The aim of our work was to calculate the activation energy for different carbide particle sizes and particle spacings, using a modified equation for the creep rate calculation. For creep-resistant steel with a microstructure of ferrite matrix and a uniform distribution of M23C6 carbide particles the creep rate was calculated in the temperature range 540 °C to 630°C and a carbide particle size between 0.1 mum and 0.4 mum. An equal effect on the creep rate increase was found for all four carbide particle sizes. From the calculated creep rates a creep activation energy of 248.7 kJ/mol was calculated, independent of the particles size. The calculated creep activationenergy was found to be close to the self-diffusion activation energy in alpha-iron. Dosedanje raziskave kažejo povezavo med porazdelitvijo karbidnih delcev v martenzitu in hitrostjo pospešenega lezenja, pri čemer je hitrost lezenja odvisna od števila karbidnih delcev na enoto površine in njihove medsebojne razdalje. Cilj našega dela je bil izračun aktivacijske energije za različne velikosti karbidnih delcev in njihovih medsebojnih razdalj. Izračun je temeljil na modificirani enačbi za izračun hitrosti lezenja. Aktivacijska energija procesa lezenja je bila izračunana za jeklo, odporno proti lezenju, z mikrostrukturo iz ferita in enakomerno porazdelitvijo karbidnih izločkov M23C6. Izračun je bil izdelan za temperaturno območje od 540 °C do 630 °C in velikost karbidnih zrn med 0,1 mim in 0,4 mim. Rezultati izračuna so pokazali enako povečanje hitrosti lezenja za vse 4 velikosti karbidnih izločkov. Na podlagi hitrosti lezenja je bila izračunana tudi aktivacijska energija lezenjav vrednosti 248,7 kJ/mol, ki se je izkazala za neodvisno od velikosti izločkov. Izračunana aktivacijska energija procesa lezenja se le malo razlikuje od aktivacijske energije za samodifuzijo v alfa-železu.

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2008 Bacsó, J. Bevilaqua, Tomas Fujda, M. Kocisko, R. Kuskulic, Tomas Kvackaj, Tibor Molnarova, M. Pokorny, I. Weiss, Michael http://rightsstatements.org/vocab/InC/1.0/ application/html application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-DQI3YA6Q http://www.dlib.si/details/URN:NBN:SI:doc-DQI3YA6Q eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Development of microstructure during the hot plastic deformation of high clean steels for power plants: Razvoj mikrostrukture med vročo plastično deformacijo visoko čistega jekla za energetske naprave: The effect of the deformation and the deformation temperature on the primary austenite grain size, the recrystallisation and the mechanical properties of high clean steel STN 41 6537 (STN standard) were investigated. This steel grade is used for the forged rotors of steam turbines in power-generation facilities. Raziskan je bil vpliv deformacije in deformacijske temperature na velikost avstenitnih zrn, rekristalizacijo in mehanske lastnosti zelo čistega jekla STN 41637 (STN standard). To jeklo se uporablja za kovane rotorje parnih turbin pri proizvodnji električne energije.

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2015 Getsov, Leonid Rybnikov, Alexandr Semenov, Artem Semenov, Sergey Tikhomirova, Elena A. http://rightsstatements.org/vocab/InC/1.0/ application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-BKO67SFQ http://www.dlib.si/details/URN:NBN:SI:doc-BKO67SFQ eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Thermal fatigue of single-crystal superalloys: experiments, crack-initation and crack-propagation criteria: preizkusi, merila za nastanek in napredovanje razpoke: Toplotno utrujanje monokristalnih superzlitin:

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2013 Ekart, Janez Kokalj, Filip Polanec, Brigita Samec, Niko http://rightsstatements.org/vocab/InC/1.0/ application/html application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-MXF99LNQ http://www.dlib.si/details/URN:NBN:SI:doc-MXF99LNQ slv Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Postopki priprave za proizvodnjo trdnih goriv iz nenevarnih odpadkov: The processes of preparation for the production of solid fuels from non-hazardous waste: The purpose of the research work in the presented article was to find a solution, by means of a mathematic model, to the problem of how to prepare solid fuels from non-hazardous waste that can be processed into solid fuels according to the national law in force. Non-hazardous waste is defined by the DIRECTIVE 2008/98/ES of the European Parliament and the Council (19.11.2008) - Annex III.1 With the application of a mathematical model and its sensitivity tool, depending on the individual characteristics of the input waste material, the optimal utilization of different waste streams at disposal based on organic and inorganic parameters for the most optimal solution for exploitation was calculated. From the waste material at disposal the desired solid fuel was made in the maximum mass amount with all the necessary qualitative characteristics with the highest quality class and from the rest of the available mass stream solid fuel of lower quality that can still be placed on the market for incineration at cement kilns or incinerators was made. When defining the quality of non-hazardous waste and solid fuel one of the most important tasks of the research was to sample the waste and the fuel correctly, which was reflected in the degree of sample homogenization to find out the chemical, physical and energy characteristics. The analysis of the metal part of the non-hazardous waste was important because of the data about the expected air-emission values of the flue gas, the fly ash, the ash and the slag that occurs when incinerating solid fuel in the heating system. The analysis of the non-metal part of the non-hazardous waste was important from the view of the calorific value of the solid fuel and of the technological and environmental impact. The results of the research showed that it is possible to achieve from the non-hazardous waste at disposal a relatively small mass fraction of high-quality solid fuel from waste according to the whole amount of mass available in Slovenia at present. Namen raziskovalnega dela v predstavljenem članku je bil z matematičnim modelom poiskati rešitev za pripravo trdnih goriv iz nenevarnih odpadkov, ki se lahko predelajo v trdno gorivo v skladu z veljavno nacionalno zakonodajo. Nenevarni odpadki so definirani z DIREKTIVO 2008/98/ES Evropskega parlamenta in Evropskega sveta (19. 11. 2008) - Priloga III1. Z uporabo matematičnega modela in njegovim orodjem občutljivosti, vezanim na posamezne lastnosti vhodnih odpadnih materialov, smo iz razpoložljivih odpadnih materialov z znanimi parametri njihovega organskega in anorganskega dela poiskali rešitev za njihovo najbolj optimalno izrabo. Iz razpoložljivih odpadnih materialov smo v maksimalnem masnem deležu pripravili zahtevano trdno gorivo z vsemi potrebnimi kakovostnimi lastnostmi z najvišjim mogočim kakovostnim razredom in iz preostanka razpoložljivih masnih tokov ostanek trdnega goriva slabše kakovosti, ki ga pa še vedno lahko plasiramo na trgu z možnostjo sosežiga v cementarnah ali sežigalnicah odpadkov. Pri ugotavljanju kakovosti nenevarnih odpadkov in trdnega goriva je bilo pomembno njihovo pravilno vzorčenje, ki se je izražalo v stopnji homogenizacije vzorcev, ki imajo vsak zase svoje kemijske, fizikalne in energijske lastnosti. Analiza kovinskega dela nenevarnih odpadkov je bila pomembna zaradi podatkov o pričakovanih emisijskih vrednostih v dimnih plinih, letečem pepelu, pepelu in žlindri, ki nastane pri sosežigu trdnega goriva v kurilni napravi. Analiza nekovinskega dela nenevarnih odpadkov je bila pomembna z vidika energijske vrednosti trdnega goriva in tehnoloških ter okoljskih posledic. Rezultati raziskovalnega dela so pokazali, da je mogoče iz razpoložljivih nenevarnih odpadkov doseči sorazmerno majhen masni delež visokokakovostnega trdnega goriva iz odpadkov glede na celotno razpoložljivo maso odpadkov, ki je sedaj v Sloveniji.

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2011 Jenko, Darja http://rightsstatements.org/vocab/InC/1.0/ application/html application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-9WICIQGA http://www.dlib.si/details/URN:NBN:SI:doc-9WICIQGA eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article TEM investigation of metallic materials - an advanced technique in materials science and metallurgy: Preiskave kovinskih materialov s presevno elektronsko mikroskopijo - moderna tehnika v znanosti o materialih in metalurgiji: The investigation of different metallic materials using high-resolution transmission electron microscopy (HRTEM) is presented. After thinning using argon ion-slicing thin foil specimens were prepared and further analyzed by various TEM analysing techniques at 200 kV, that make a powerful combination to resolve a large number of problems encountered in materials science and metallurgy. Some case studies of such problems are presented: influence of foaming agents in manufacturing processes of aluminium metal foams, removal of remaining oxides from the surface of duplex stainless steel (DSS), effect of low temperature ageing on properties of DSS, effect of heat treatment on the microstructure and properties of precipitate containing aluminium alloys. V prispevku so opisane preiskave različnih kovinskih materialov z visokoločljivostno presevno elektronsko mikroskopijo. Vzorce tankih folij smo po tanjšanju z rezanjem z ioni argona nadalje preiskovali pri 200 kV z različnimi analiznimi tehnikami presevne elektronske mikroskopije, ki so močna kombinacija pri reševanju velikega števila problemov, s katerimi se srečujemo v znanosti o materialih in metalurgiji. Predstavljenih je nekaj primerov takšnih problemov: vpliv penilnih sredstev v proizvodnji kovinskih aluminijevih pen, odstranitev preostalih oksidov s površine dupleksnega nerjavnega jekla (DSS), vpliv nizkotemperaturnega staranja na lastnosti DSS, vpliv toplotne obdelave na mikrostrukturo in lastnosti aluminijevih zlitin z vključki.

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2015 Leskovšek, Vojteh Podgornik, Bojan http://rightsstatements.org/vocab/InC/1.0/ application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-B62FMCHN http://www.dlib.si/details/URN:NBN:SI:doc-B62FMCHN eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Wear mechanisms and surface engineering of forming tools: Obrabni mehanizmi in inženiring površine preoblikovalnih orodij:

oai:repox.nuk.uni-lj.si:materiali:e7fa8e31-e34c-43ba-a35e-b7f70f195c042020-05-14materiali

info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2000 Breskvar, Bojan Doberšek, Mirko Mandrino, Djordje Tandler, Marko Torkar, Matjaž http://rightsstatements.org/vocab/InC/1.0/ application/html application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-BDQ15MKL http://www.dlib.si/details/URN:NBN:SI:doc-BDQ15MKL slv Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Študij vključkov v primarnem aluminiju: Study of inclusions in primary aluminium: The iclusions in primary aluminium by origin are endogenous and exogenous. Samples were taken from elecrolytic cell and analysed with high resolution Auger electron spectrometry HRAES. Results showed importance of preparation of sample, especially sufficient ion etching for removing of surface oxides. In primary aluminium analyses confirmed the presence of elements like magnesium, cooper and molybdenum which is unknown from the literature. Vključki v primarnem aluminiju in zlitinah so endogenega in eksogenega izvora. Vzorci, vzeti iz elektrolizne celice, so bili analizirani z Augerjevo elektronsko spektrometrično analizo z visoko ločljivim HRAES. Rezultai so pokazali, da je metoda izredno občutljiva in da je pomembna priprava vzorcev, to je dovolj dolgo ionsko jedkanje, da se očisti okside na površini. V primarnem aluminiju so bili ugotovljeni elementi, kot so magnezij, baker in molibden, o katerih v literaaturi ni najti podatkov.

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2012 Bocek, David Gryc, Karel Horáková, Dana Huczala, Tomáš Michalek, Karel Morávka, Jan Tkadlečková, Markéta http://rightsstatements.org/vocab/InC/1.0/ application/html application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-GSYVNI0C http://www.dlib.si/details/URN:NBN:SI:doc-GSYVNI0C eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Type of submerged entry nozzle vs. concentration profiles in the intermixed zone of round blooms with a diameter of 525 mm: Primerjava vrste potopljene šobe in profila koncentracije v območju mešanja pri okroglih blokih s premerom 525 mm: This work compares the experimental results of nickel-concentration measurements in the intermixed zone of the continuously cast round blooms witha diameter of 525 mm using two types of submerged entry nozzles (SEN) - a straight-through nozzle and the one with 5-ports. Based on the determination of the system and optical interface in a bloom, a detailed study of the concentration profiles on the bloom surface in a small-radius area, on the right-hand side, and then also on the cross sections of the blooms was carried out. The results were further analysed using the approximation models, and were used to verify the proposed model predicting the intermixed zones for the continuous-casting machines. The developed model was based on the results of the physical and numerical modelling. V tem delu so predstavljeni eksperimentalni rezultati merjenja koncentracije niklja v območju mešanja kontinuirno ulitih okroglih blokov s premerom 525 mm pri uporabi dveh vrst potopljenih šob (SEN) - gladke ravne šobe in šobe s 5 odprtinami. Opravljen je bil podrobnejši študij profila koncentracije na površini bloka na področje majhnega premera, na ravnem delu in tudi na prečnem prerezu bloka. Rezultati so bili analizirani z uporabo modelov približka in uporabljeni za napovedovanje območja mešanja pri napravah za kontinuirno ulivanje. Razviti model temelji na rezultatih fizikalnega in numeričnega modeliranja.

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2008 Bernik, Slavko Daneu, Nina Podlogar, Matejka Rečnik, Aleksander http://rightsstatements.org/vocab/InC/1.0/ application/html application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-8IQQQOZC http://www.dlib.si/details/URN:NBN:SI:doc-8IQQQOZC eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Tailoring the microstructure of ZnO-based ceramics: Kontrola razvoja mikrostrukture v ZnO keramiki:

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2018 Hu, Yaobo Meng, Wanqiu Yang, Qin Zhang, Chao Zheng, Tianxu Zhu, Zhentao http://rightsstatements.org/vocab/InC/1.0/ application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-I9JRU4KT http://www.dlib.si/details/URN:NBN:SI:doc-I9JRU4KT eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Deformation behavior of the Mg-7Zn-3Cu-1Ce alloy during hot compression: Študij deformacije magnezijeve zlitine Mg-7Zn-3Cu-1Ce med vročim stiskanjem:

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2000 Kolar, Drago Kramberger, Albina Zupan, Klementina http://rightsstatements.org/vocab/InC/1.0/ application/html application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-08DR35FE http://www.dlib.si/details/URN:NBN:SI:doc-08DR35FE slv Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Vpliv pakiranja zgorevalne zmesi na potek sinteze pri citratno nitratnem postopku: Influence of the citrate-nitrate reaction mixture packing on combustion synthesis: A citrate-nitrate gel combustion reaction was used for the submicron crystalline strontium substituted lanthanum cromite (LSC) preparation. The influence of the reaction mixture packing prior combustion for the different fuel contents on the reaction temperature and reaction period, phase formation and specific surface area of so prepared powders was investigated. It was shown that the reaction period depends on fuel/oxidant ratio and reaction mixture packing. The reaction duration time was few seconds for the loose packed layer prepared samples and few tens of seconds for samples prepared from the pallete, respectively. The nature of the agglomerates formation was studied by SEM in the green compacts pressed at 300 MPa. Thermal analysis was used to determine degree of conversion for as prepared samples. Lastnosti prahov, ki nastanejo pri zgorevalni sintezi v sistemih gorivo/nitrat, niso odvisne le od redukcijsko-oksidacijskega razmerja, temveč tudi od geometrije reakcijske zmesi. Te vplive smo spremljali pri izgorevanju citratno-nitratnih gelov lantanovega kromita, dopiranega s stroncijem (LSC). Ugotovili smo, da geometrija zgorevalne mešanice določa čas pri temperaturi sinteze ter s tem specifično površino nastalih produktov, vrsto kristalnih faz in stopnjo pretvorbe. Sinteza v nasuti plasti poteče za stehiometrijske mešanice v nekaj sekundah, medtem ko so sinteze v tableti potekale nekaj deset sekund. Naravo aglomeratov v produktu smo spremljali z elektronsko mikroskopijo zelenih tablet, stisnjenih pri tlaku 300 MPa. S termično analizo smo ugotavljali zreagiranost produktov sinteze.

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2001 Bajt Leban, Mirjam Bajt, Žiga Gomboc, Janez Kuhar, Viljem Legat, Andraž http://rightsstatements.org/vocab/InC/1.0/ application/html application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-CKUZN2R7 http://www.dlib.si/details/URN:NBN:SI:doc-CKUZN2R7 slv Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Ugotavljanje poškodb vrvnih prižemk in analiza vzrokov njihovega nastanka: An assessment of the damage to ropeway clips and an analysis of the source of the damage: Vrvna prižemka je nosilni, dinamično obremenjen konstrukcijski element, ki povezuje sedežno obešalo s transportno vrvjo sedežnice. V lanskem letu smo sistematično vizuelno in defektoskopsko pregledali večje število prižemk in ostalih vitalnih konstrukcijskih elementov sedežnic. Osnovni cilj preiskav je bil oceniti njihovo stanje, detektirati obstoječe razpoke in ostale poškodbe, ki bi lahko vodile do nenadnih lomov ter določili obseg teh poškodb. Ultrazvočna metoda s posebej prirejeno površinsko sondo se je pokazala kot najprimernejša in izredno zanesljiva metoda za določanje razpok na prižemkah. Rezultati preiskav so pokazali, da ima material prižemk in nekaterih drugih konstrukcijskih elementov zelo nizko žilavost in grobo zrnato feritno - perlitno mikrostrukturo, ki je posledica neustrezne toplotne obdelave. Konstrukcijski elementi iz materiala s tako strukturo ne zagotavljajo zadostne odpornosti proti krhkemu lomu.

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2017 Lajlar, Bojan Mayer, Janez Vižintin, Goran Vukelič, Željko http://rightsstatements.org/vocab/InC/1.0/ application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-444MX015 http://www.dlib.si/details/URN:NBN:SI:doc-444MX015 eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Rock burst dependency on the type of steel arch support in the Velenje mine: Hribinski udari v odvisnosti od vrste jeklenih podpornih lokov v premogovniku Velenje:

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2001 Glogovac, Branislav Jaklič, Anton Kolenko, Tomaž Končan, Ivan Kumer, Boris Marolt, Tomaž http://rightsstatements.org/vocab/InC/1.0/ application/html application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-6F0G6Z78 http://www.dlib.si/details/URN:NBN:SI:doc-6F0G6Z78 slv Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Prenosni sistem za merjenje temperaturnih profilov v industrijskih pečeh: A mobile system for the measurement of temperature profiles in industrial furnaces: Industrial furnaces are mostly controled by a measurement of the "furnace temperature" using a roof- or wall-mounted thermocouple. This classical control method is often unsatisfactory and with discontinuous furnace operations can lead to wide variations in the disscharge stock temperature. The actual steel temperatures were measured with trailing thermocouples. The complete portable system for measurement of temperature profiles in industrial furnace has been calibrated in the laboratory. Regulacija temperature v industrijskih ogrevnih pečeh se večinoma izvaja na podlagi "temperature peči" z uporabo termoelementov, montiranih v stropu ali na stranskih stenah posameznih con peči. Ta klasični način vodenja peči je pogosto neučinkovit, ker pri diskontinuirnem obratovanju peči nastopajo velike razlike temperatur vložka pri dešaržiranju. Da bi pri tem načinu vodenja peči ugotovili dejanski potek ogrevanja vložka, smo izvajali meritve z uporabo vlečnih termoelementov. Celotni prenosni merilni sistem za merjenje temperaturnih profilov v industrijskih pečeh smo predhodno umerili v laboratoriju.

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2013 Gándara, María Josefa Freiría http://rightsstatements.org/vocab/InC/1.0/ application/html application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-MZJNTCA7 http://www.dlib.si/details/URN:NBN:SI:doc-MZJNTCA7 eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Aluminium: Aluminij: kovina izbire: the metal of choice: This article summarizes the importance of aluminium as the metal of choice formany applications. Aluminium is a lightweight, durable metal. It is silvery in appearance when freshly cut, is a good conductor of heat and electricity, and is easily shaped by moulding and extruding. Aluminium has two main advantages when compared with other metals. Firstly, it has a low density, about one-third that of iron and copper. Secondly, although it reacts rapidly with the oxygen in air, it forms a thin, tough and impervious oxide layer that resists further oxidation. This removes the need for surface-protection coatings such as those required with other metals, in particular with iron. All the indications are that the growth in the use of aluminium will likely accelerate. It is expected that in the near future the use of aluminium with specifically improved properties will grow in many applications, meeting the increased economic and ecological demands. Considering the entire life-cycle of an automobile, from the extraction of materials to the final disposal, including recycling and reuse applications, aluminium proves to be a potential alternative to steels in future automotive applications. Članek povzema pomembnost aluminija kot izbrane kovine z mnogimi možnostmi uporabe. Aluminij je lahka, zdržljiva kovina. Je srebrne barve, ko je sveže odrezan, je dober prevodnik toplote in elektrike in se lahko oblikuje z ulivanjem v kokile in z ekstruzijo. Aluminij ima v primerjavi z drugimi kovinami dve glavni prednosti. Prva je majhna gostota, okrog ene tretjine gostote železa ali bakra. Druga: čeprav hitro reagira s kisikom iz zraka, tvori tanko, trdo in neprepustno oksidno plast, ki preprečuje nadaljnjo oksidacijo. Zato ni potrebe po površinski zaščiti, kot jo zahtevajo druge kovine, še posebno železo. Kaže, da se bo rast porabe aluminija še nadaljevala. V bližnji prihodnosti se pričakuje, da bo zaradi povečanja ekonomskih in ekoloških zahtev uporaba aluminija s posebnimi, izboljšanimi lastnostmi rastla na mnogih področjih uporabe. Z upoštevanjem celotnega trajnostnega cikla avtomobila, od pridobivanja materiala do odlaganja, vključno z recikliranjem in možnostjo nadaljnje uporabe, aluminij dokazuje, daje mogoča alternativa jeklom v prihodnji proizvodnji avtomobilov.

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2000 Kaiser, Vladimir Stropnik, Črtomir http://rightsstatements.org/vocab/InC/1.0/ application/html application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-82VP0CU8 http://www.dlib.si/details/URN:NBN:SI:doc-82VP0CU8 slv Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Strjevanje polimera v sistemu polisulfon/N,N-dimetilacetamid/voda in njegova morfološka raznolikost: Solidification of polymer in system polysulfone/N,N-dimethylacetamide/water and its morphologic variety: Wet phase inversion of a ternary system polysulfone/N,N-dimethylacetamide/water (PSf/DMA/water) was studied with intention to enhance the understanding of the mechanism of polymeric asymmetric porous membranes formation. Membranes cross-sections were investigated with scanning electron microscopy and the phase inversion process was observed by turbidity measurement of membrane forming system during the membrane forming process. Changing of polymer content in a PSf/DMA solution and thickness of cast layer cause the formation of a polymer latex and morphologically different membranes during the process of wet phase inversion. Membranes with cellular, bicontinuous and bead-like morphology are formed. Their formation can be presented in ternary phase diagram polymer/solvent/nonsolvent by "composition paths" and explained by different modes of phase inversion. Preučevali smo mokro fazno inverzijo ternaranega sistema polisulfon/N,N-dimetilacetamid/voda (PSf/DMA/voda) z namenom, poglobiti razumevanje mehanizma nastajanja polimernih asimetričnih poroznih membran. Morfologije presekov membran smo preučevali z vrstično elektronsko mikroskopijo, sam proces fazne inverzije pa smo opazovali z merjenjem motnosti membranotvornega sistema med procesom nastajanja membrane. Spreminjanje vsebnosti polimera v raztopini (PSf/DMA) in debeline njenega nanosa povzroči v procesu mokre fazne inverzije poleg nastanka polimernega lateksa formiranje morfološko različnih membran. Nastanejo membrane s celično, dvozvezno in krogličasto zrnatao morfologijo. Njihov nastanek lahko predstavimo s "potmi sestave" v ternarnem faznem diagramu polimer/topilo/netopilo in pojasnimo z različnimi načini fazne inverzije.

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2015 Glodež, Srečko Šori, Marko Verlak, Tomaž http://rightsstatements.org/vocab/InC/1.0/ application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-DZEHHA3P http://www.dlib.si/details/URN:NBN:SI:doc-DZEHHA3P eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Material parameters for a numerical simulation of a compaction process for sintered double-height gears: Materialni parametri za numerično simulacijo postopka stiskanja sintranih dvovišnskih zobnikov:

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2013 Castano, Víctor M. Rodríguez, Rogelio http://rightsstatements.org/vocab/InC/1.0/ application/html application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-5BFQ0EVS http://www.dlib.si/details/URN:NBN:SI:doc-5BFQ0EVS eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Nanotechnology for ballistic materials: from concept to products: Nanotehnologija za balistične materiale: od izhodišča do proizvoda: The main trends and materials in protection technologies are briefly reviewed, emphasizing the properties and limitations of p-aramid fibres, widely used in armour systems, particularly in terms of their susceptibility to UV radiation, humidity and chemical attacks. Then, a novel nanotechnology capable of effectively diminishing these effects is described, as well as its application for an actual commercial ballistic vest. Podan je pregled glavnih usmeritev in materialov v tehnologijah zaščite s poudarkom na lastnostih in omejitvah p-aramidnih vlaken, ki se uporabljajo v oborožitvenih sistemih s poudarkom na njihovo občutljivost za UV-sevanje, vlago in kemični napad. Nato so opisane nove nanotehnologije, ki so sposobne zmanjšati te vplive, kot tudi njihova uporaba pri dejanskem komercialnem balističnem telovniku.

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2013 Rudolf, Rebeka Ternik, Primož Žunič, Zoran http://rightsstatements.org/vocab/InC/1.0/ application/html application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-GBBJSNKT http://www.dlib.si/details/URN:NBN:SI:doc-GBBJSNKT eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Numerical study of Rayleigh-Bénard natural-convection heat-transfer characteristics of water-based Au nanofluids: Numerična analiza prenosa toplote nanotekočin voda-Au v razmerah Reyleigh-Bénardove naravne konvekcije: The present work deals with the natural convection in a square cavity filled with a water-based Au nanofluid. The cavity is heated from the lower and cooled from the adjacent wall, while the other two walls are adiabatic. Theg overning differential equations have been solved with the standard finite volume method and the hydrodynamic and thermal fields have been coupled using the Boussinesq approximation. The main objective of this study is to investigate the influence of the nanoparticlesć volume fraction on the heat-transfer characteristics of Au nanofluids at a given base-fluid (i.e., water) Rayleigh number Rabf. Accurate results are presented over a wide range of the base-fluid Rayleigh numbers (102 L Rabf L 105) and the volume fraction of Au nanoparticles (0 % L j L 10 %). It is shown that adding nanoparticles to the base fluid delays the onset of convection. Contrary to what is argued by many authors, we show, with numerical simulations, that the use of nanofluids can reduce the heat transfer instead of increasing it. V prispeveku obravnavamo naravno konvekcijo v kvadratni kotanji, napolnjeni z nanotekočino voda-Au. Kotanja je bila greta s spodnje in hlajena s priležne zgornje stene, preostali dve steni sta bili adiabatni. Vodilne diferencialne enačbe smo reševali s standardno metodo končnih prostornin. Hidrodinamično in temperaturno polje sta bila sklopljena z uporabo Boussinesqove aproksimacije. Glavni cilj prispevka je raziskati vpliv prostorninskega deleža nanodelcev na značilnosti prenosa toplote Au-nanotekočine pri podani vrednosti Rayleighjevega števila nosilne tekočine (vode) Rabf. Natančni rezultati so predstavljeni za široko območje vrednosti Rayleighjevega števila nosilne tekočine (102 L Rabf L 105) in prostorninskega deleža Au-nanodelcev (0 % L j L10 %). Pokazali smo, da dodajanje nanodelcev v nosilno tekočino zakasni začetek naravne konvekcije. V nasprotju s trditvami mnogih avtorjev smo z numeričnimi simulacijami pokazali, da lahko uporaba nanodelcev prenos toplote zmanjša in ne poveča.

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2017 Kurc-Lisiecka, Agnieszka Lisiecki, Aleksander http://rightsstatements.org/vocab/InC/1.0/ application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-0EITIZOJ http://www.dlib.si/details/URN:NBN:SI:doc-0EITIZOJ eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Laser welding of the new grade of advanced high-strength steel Domex 960: Lasersko varjenje Domex 960 novega naprednega jekla z visoko trdnostjo:

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2013 Bucek, Pavol Klimes, Lubomir Stetina, Jozef http://rightsstatements.org/vocab/InC/1.0/ application/html application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-LCDINYBX http://www.dlib.si/details/URN:NBN:SI:doc-LCDINYBX eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Impact of casting speed on the temperature field of continuously cast steel billets: Vpliv livne hitrosti na temperaturno polje kontinuirno ulitih gredic iz jekla: In continuous casting, the casting speed is one of the most important parameters that influence the entire process of steel production and its productivity. From the physical point of view, the casting speed affects the temperature field formation along the cast steel blank, e.g., the surface and corner temperatures as well as the solidification of the steel, e.g., the shell thickness, the isosolidus and isoliquidus curves, the metallurgical length and the width of the mushy zone. In order to achieve a particular steel structure, the temperature ranges in particular positions (e.g., due to the straightening), and to minimize the occurrence of defects, it is very important to pay attention to a proper determination of the casting speed. The aim of this paper is to investigate the impact of the casting speed on the temperature field formation of continuously cast steel billets, and on the aforementioned parameters. Three steel grades with various chemical compositions and the originally implemented numerical model of the transient temperature field of continuously cast billets in Zeleziarne Podbrezova in Slovakia were utilized for the analysis. The results proved the significant influence of the casting speed on the temperature field formation and on related parameters. The conclusions may be utilized, e.g., for the determination of the casting speed and for the setup of the caster. Pri kontinuirnem ulivanju je hitrost ulivanja eden od odločilnih parametrov, ki vplivajo na celoten proces proizvodnje jekla in na storilnost. Iz fizikalnega vidika hitrost ulivanja vpliva na nastanek temperaturnega polja vzdolž jeklene gredice, kot na primer na temperaturo robov in površine ulitega bloka, kot tudi na strjevanje jekla, kot na primer debelina strjene skorje, krivulje izosolidusa in izolikvidusa, metalurška dolžina in širina kašastega področja. Da bi dosegli želeno strukturo jekla, temperaturno področje v določenih položajih (npr. zaradi ravnanja) in da bi zmanjšali nastanek poškodb, je zelo pomembno, da smo pozorni na pravilno določitev hitrosti ulivanja. Namen prispevka je raziskati vpliv hitrosti ulivanja na oblikovanje temperaturnega polja pri kontinuirno ulitih gredicah in na že navedene parametre. Za analize so bila uporabljena tri različna jekla z različnimi kemijskimi sestavami in originalen numerični model prehodnega temperaturnega polja gredic v Železarni Podbrezova na Slovaškem. Rezultati potrjujejo pomemben vpliv hitrosti ulivanja na nastanek temperaturnega polja in s tem povezanih parametrov. Ugotovitve se lahko uporabijo na primer za določitev hitrosti ulivanja in za postavitev livne naprave.

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2004 Gobin, Dominique Šarler, Božidar Založnik, Miha http://rightsstatements.org/vocab/InC/1.0/ application/html application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-EWADJQYL http://www.dlib.si/details/URN:NBN:SI:doc-EWADJQYL eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Simulation of macrosegregation in the DC casting of binary aluminum alloys:

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2001 Munih, Pavel Šilar, Črtomir Šušterič, Zoran http://rightsstatements.org/vocab/InC/1.0/ application/html application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-H3W31XRY http://www.dlib.si/details/URN:NBN:SI:doc-H3W31XRY slv Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Vibracijsko dušilne lastnosti butilnih vulkanizatov: Vibration damping properties of butyl vulcanizates: Insulating a building from the ground is becoming the most important technology in earthquake regions and requires highly-vibration-damping rubber bearings. Their application lowers the natural frequency of the building and reduces the ground-to-building transmission of the eartquake energy. In this work, the vibration damping properties of butyl elastomer in combination with sulphur and carbon black were studied, in terms of earthquake insulation bearings. Za izolacijo zgradb od tal, ki postaja vodilna tehnologija na potresno najbolj obremenjenih območjih, so potrebna visoko dušilna elastomerna ležišča. Z njihovo uporabo dosežemo znižanje lastne frekvence objekta in zmanjšamo prenos potresne energije s tal na objekt. V tem delu smo preučili vibracijsko dušilne sposobnosti butilnega elastomera v kombinaciji z žveplom in sajami, ki bi ga uporabili pri izdelavi protipotresnih ležišč.

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2001 Anžel, Ivan Križman, Alojz Lojen, Gorazd http://rightsstatements.org/vocab/InC/1.0/ application/html application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-76O3SL9U http://www.dlib.si/details/URN:NBN:SI:doc-76O3SL9U slv Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Vpliv pogojev strjevanja na mikrostrukturo zlitin in kompozitov s sestavo AlSi17Cu5: Influence of solidification conditions on the microstructure of Al 17wt.%Si 5wt.%Cu alloys and composites: The microstuctures of as-cast alloys depend not only on their chemical composition, they are also strongly affected by process parameters that determine the solidification conditions. The most important of these are the cooling rate and the melt motion during solidification. Traditional csting methods only allow for small variations in the cooling rate, which is more or less determined by the choice of casting method (sand casting, gravity casting in permament moulds, pressure casting). Motion during the solidification is limited to the circulation caused by pouring the melt into the mould. In most cases it is of short duration and too weak to affect the microstructure significantly. The majority of techniques for producing materials with a non-dendritic microstructure (required for thixo casting, thixo forging...) are based on intensive circulation (stirring) during solidification. These techniques afford control of two important production parameters: coolin rate and stirring speed. Nevettheless, the crystallization sequence and the phases present in the materials are still determined by alloy phase diagrams and chemical composition. The chosen cooling rate and stirring speed result in similar nucleation and growth conditions for all phases crystallizing in the stirred melt. Totally different nucleation and growth conditions for differentphases can only br assured if the material is made as a composite. By the "synthesis of semi-solid mixtures" it is possible to manufacture materials containing several primary phases of the corresponding phase diagram. In addition, this production technique enables the individual control of particle size and morphology for each primary phase in the composite. In this paper, microstructures of several Al 17wt.%Si 5 wt.%Cu materials are discussed: three samples were solidified under different coolingrates without forced convection, one was stirred in the semi solid state and two are composites made by the "synthesis of semi-solid mixtures". Mikrostrukture zlitin v litem stanju so, razen od kemijske sestave, odvisne od procesnih parametrov, ki opredeljujejo razmere pri strjevanju. Najvplivnejša sta hitrost ohlajanja in gibanje taline med strjevanjem. Klasični postopki litja dopuščajo le relativno majhen vpliv na hitrost ohlajanja, saj je le-ta okvirno določena že z izbiro postopka (litje v pesek, litje v kokile, tlačno litje ...). Gibanje taline je omejeno na vrtinčenje, ki je posledica ulivanja v formo. V večini primerov je kratkotrajno in prešibko, da bi imelo večji vpliv na mikrostrukturo. Večina postopkov priprave materialov za predelavo v delno staljenem stanju temelji na intenzivnem gibanju taline med strjevanjem, ki omogoča ravoj nedendritne, globulitne morfologije primarnih trdnih faz. Pri teh postopkih je mogoče variirati dva procesna parametra: hitrost ohlajanja in hitrost mešanja. Kljub temu so faze v materialu in zaporedje njihove kristalizacije še vedno skladne s faznim diagramom in s sestavo zlitine. Izbrani hitrosti ohlajanja in mešanja opredeljujeta podobne pogoje nukleacije in rasti za vse faze, ki kristalizirajo iz taline med mešanjem. Bistvenio različne pogoje za nukleacujo in rast delcev posameznih faz v materialih je mogoče izbirati le, če material izdelamo kot kompozit. S postopkom sinteze delno staljenih mešanic je mogoče izdelati materiale, ki vsebujejo več primarnih faz, pri čemer lahko delcem vsake od teh faz predpišemo drugačno obliko in velikost. V tem prispevku obravnavamo mikrostrukture različnih materialov s povprečno kemijsko sestavo AlSi17Cu5: mikrostrukture različno hitro (brez mešanja) strjenih zlitin, zlitine, strjene med mešanjem, in kompozitov, izdelanih s sintezo delno staljenih mešanic.

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2016 Dobrovolný, Petr Dolák, Dušan Dvořák, Karel Všianský, Dalibor http://rightsstatements.org/vocab/InC/1.0/ application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-9MTW0IOJ http://www.dlib.si/details/URN:NBN:SI:doc-9MTW0IOJ eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Evaluation of the grindability of recycled glass in the production of blended cements: Ocena sposobnosti drobljenja recikliranega stekla pri proizvodnji mešanih cementov:

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2013 Golobič, Amalija Maček, Jadran Marinšek, Marjan Skalar, Tina http://rightsstatements.org/vocab/InC/1.0/ application/html application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-EIO08YYA http://www.dlib.si/details/URN:NBN:SI:doc-EIO08YYA eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Determination of the metal concentrations in an anode material for solid-oxide fuel cells: Določitev vsebnosti kovin v anodnem materialu za gorivne celice s trdnim elektrolitom:

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2014 Paulin, Irena http://rightsstatements.org/vocab/InC/1.0/ application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-BHGABRE9 http://www.dlib.si/details/URN:NBN:SI:doc-BHGABRE9 eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Synthesis and characterization of Al foams produced by powder metallurgy route using dolomite and titanium hydride as a foaming agents: Sinteza in karakterizacija aluminijevih pen, narejenih po postopku prašne metalurgije z uporabo dolomita in titanovega hidrida kot penilnega sredstva: Production of aluminum foams by the powder-metallurgy process depends on the preparation of pre-cursors. In general, pre-cursors consist of compacted mixture of metallic powder and foaming agent, which is foamed at a pre-determined temperature. Due to high temperature of foaming procedure, the foaming agent decomposes into a solid component that is built into the matrix material, and a gas component that causes foaming of the matrix material. Powder metallurgy is a method for making close-cell foams and it is the best selection, especially for the production of net-shape parts, providing excellent quality of end products. In our research work, powders, precursors and foams, made from different metallic powders (Al 99.7 % purity, AlSi12 alloy) with different foaming agents (TiH2, CaCO3, CaMg(CaCO3)2), were examined with different analytical techniques. Aluminijeve pene, narejene po postopku prašne metalurgije, so zelo odvisne od priprave prekurzorjev. Ti so narejeni iz stisnjenih prašnih delcev osnovnega materiala in penilnega sredstva ter penjeni pri določeni temperaturi. Zaradi visokih temperatur penilno sredstvo razpade na trdno snov, ki se vgradi v osnovni material, in plin, ki povzroči penjenje osnovnega materiala. Po postopku prašne metalurgije se izdelujejo aluminijeve pene z zaprto poroznostjo. Ta metoda je najbolj primerna za izdelavo kompleksno oblikovanih končnih oblik izdelkov. Pri našem raziskovalnem delu smo z različnimi analitskimi tehnikami raziskali kovinske prahove (Al, čistote 99,7 %, in zlitine AlSi12) in penilna sredstva (TiH2, CaCO3, CaMg(CaCO3)2), prekurzorje ter končne porozne materiale.

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2014 Glavaš, Zoran Matijašić, Gordana Štrkalj, Anita http://rightsstatements.org/vocab/InC/1.0/ application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-IGWRKHA0 http://www.dlib.si/details/URN:NBN:SI:doc-IGWRKHA0 eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Adsorption of hexavalent chromium from an aqueous solution of steel-making slag: Adsorpcija heksavalentnega kroma iz vodne raztopine jeklarske žlindre: A batch removal of Cr(VI) ions from an aqueous solution under different experimental conditions using steel-making slag as a low-cost adsorbent is presented in this paper. The obtained results showed that the steel-making slag is an effective adsorbent for the removal of Cr(VI) ions from aqueous solutions. The adsorption of Cr(VI) with the steel-making slag follows the Langmuir isotherm equation. Among the tested kinetics models in this study (pseudo-first-order, pseudo-second-order, Elovich and intraparticle-diffusion models), the pseudo-second-order equation successfully predicted the adsorption. The thermodynamic parameters for the adsorption process were determined and discussed. V članku je predstavljena raziskava odstranjevanja ionov Cr(VI) iz vodne raztopine z jeklarsko žlindro kot poceni adsorbenta pri različnih eksperimentalnih razmerah. Dobljeni rezultati so pokazali, da je jeklarska žlindra učinkovit adsorbent za odstranjevanje Cr(VI) ionov iz vodnih raztopin. Adsorpcija ionov Cr(VI) z jeklarsko žlindro se sklada z Langmuirovo izotermno enačbo. V tej študiji je od preizkušenih kinetičnih modelov (psevdo prvega reda, psevdo drugega reda, Elovichev model in model difuzije med delci) enačba psevdo drugega reda uspešno napovedala adsorpcijo. Določeni in obravnavani so termodinamični parametri za proces adsorpcije.

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2012 Gameiro, André Leal Santos-Silva, Antonio Veiga, Maria do Rosário Velosa, Ana Luísa http://rightsstatements.org/vocab/InC/1.0/ application/html application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-JH7WWUZH http://www.dlib.si/details/URN:NBN:SI:doc-JH7WWUZH eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Lime-metakaolin hydration products: a microscopy analysis: Produkti hidracije apno-metakaolin: mikroskopska analiza: Metakaolin (MK) is nowadays a well-known pozzolanic material being used in cement-based materials, like mortars and concretes. The reaction of MK with calcium hydroxide yields cementitious products, being calcium silicate hydrate (CSH), stratlingite (C2ASH8) and tetra calcium aluminium hydrate (C4AH13) the main phases formed at ambient temperature. The transformation of stratlingite and C4AH13 into hydrogarnet at long term is an important issue that may result in an increase in the porosity and a loss of compressive strength that can induce a complete material degradation. With the objective of studying the compounds formed in lime/MK pastes and their stability during time, blended pastes were prepared with several substitution rates (in weight) of lime by MK, and maintained at RH > 95 % and 23 2 °C. XRD and TGA-DTA were used to follow the kinetics of the lime/MK hydration as well the reaction products. Microscopic tests (SEM-EDS) results are performed and compared with the thermal and mineralogical data. The results obtained show that the quantity of the hydration products formed changes with the lime replacement, being the aluminum and calcium silicates more abundant in the higher MK content pastes, and C4AH13, C4AH11 and C2ASH8 the major phases formed up to 90 days of curing. Metakaolin (MK) je danes dobro poznan pocolanski material in se uporablja v gradivih na podlagi cementa, npr. malta in beton. Reakcija MK s kalcijevim hidroksidom ustvari cementne proizvode: kalcijev silikatni hidrat (CSH), stratlingit (C2ASH8) in tetra kalcij aluminijev hidrat (C4AH13) kot glavne faze, ki nastanejo pri temperaturi okolice. Transformacija stratlingita in C4AH13 v hidrogarnet po dolgem času je proces, ki lahko poveča poroznost in zmanjša tlačno trdnost ter lahko povzroči popolno degradacijo materiala. S ciljem raziskave spojin, ki so nastale v zmeseh apno-MK, in njihove časovne stabilnosti smo pripravili mešane mase z več deleži zamenjave (v masi) apna z VK in zorili pri RH > 95 % in 23 2 °C. XRD in TGA-DTA so bile uporabljene za spremljanje kinetike hidracije apna-MK in reakcijskih produktov. Rezultate mikroskopskih opazovanj (SEM-EDS) smo primerjali s termalnimi in mineraloškimi podatki. Dobljeni rezultati kažejo, da količina hidracijskih produktov z nadomestitvijo količine apna količina aluminijevih in kalcijeviih silikatov raste z vsebnostjo MK v masi in so C4AH13, C4ACH11, C2ASH8 glavne faze, nastale po 90 dneh zorenja.

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2000 Mirtič, Breda Planjšek, Mojca http://rightsstatements.org/vocab/InC/1.0/ application/html application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-7PEE31IR http://www.dlib.si/details/URN:NBN:SI:doc-7PEE31IR slv Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Določanje strukture glinenega oblikovanca z optičnim mikroskopom: Identification of the clay body structure by the optical microscope: Plastic clay is used for manufacturing of the building ceramic. Low amounts of different mineral components are added in order to optimize the manufacturig process and to modify the properties as well as the product image. Results of the investigations of the fired clay bodies are presented in the article. The clay bodies were fired in the oxidation and in the reduction atmosphere at different temperatures. Different amounts of grog, ?$MnO_2$?, ?$TiO_2$?, quartz and fritta were added. Investigations of the thin and polished sections of the fired bodies by optical microscope proved the existence of black cores as well as a relationship between porosity, the firing temperature and the amount of the fritta added. In addition, a partial melting of the added mineral components and the influence of the added mineral components on the microscopic image of the clay product was also proved. Za izdelavo gradbene keramike uporabljamo v Sloveniji plastično glino, ki da po žganju rdečo črepinjo. Za optimizacijo sestave mase glede procesa izdelave oblikovanca, žganja ter za doseganje spreminjanja končnih lastnosti in videza izdelka uporabljajo proizvajalci različne dodatke. V sestavku so predstavljeni rezultati preiskav glinenih oblikovancev po žganju v oksidacijski in redukcijski atmosferi pri različnih končnih temperaturah z dodatki opečnega zdroba, ?$MnO_2$?, ?$TiO_2$?, kremenovega peska in frite. S preiskavo v presevni in odsevni svetlobi smo dokazali nastanek črnih jeder, zmanjševanje poroznosti v odvisnosti od končne temperature in dodane frite, delno taljenje posameznih zrn dodatkov ter vpliv na mikroskopski videz izdelka.

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info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2000 Novak, Saša Veskovič-Bukudur, Stojana http://rightsstatements.org/vocab/InC/1.0/ application/html application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-1GZYDL6M http://www.dlib.si/details/URN:NBN:SI:doc-1GZYDL6M slv Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Reološke lastnosti parafinskih suspenzij aluminijevega oksida: Rheological properties of alumina-paraffin suspensions: The rheological properties of ceramic suspension for low-pressure injection moulding (LPIM) determine the process parameters during moulding as well as the properties of the molded and sintered ceramic parts. The suspension must contain a high percentage of solids, yet still exhibit satisfactory rheological properties under injection-moulding conditions. However despite their low viscosity the injected parts should survive handling and thermal removal of a binder without deformation. To a large extent the properties of the suspension for LPIM can be tailored by using suitable powders and surfactants. The paper describes the results of a study on the rheological properties of alumina-paraffin suspensions with different surface agents. The effect of the particle size distribution and surface-active agents are shown and discussed. Reološke lastnosti parafinskih suspenzij za oblikovanje keramike z nizkotlačnim brizganjem so bistvenega pomena za procesne parametre pri brizganju, kot tudi za kvaliteto sintranih keramičnih izdelkov. Suspenzija mora imeti po eni strani dovolj majhno viskoznost, ki omogoča brizganje pri nizkem tlaku, po drugi pa morajo brizgani izdelki med tremično ekstrakcijo, kipoteka pri temperaturah nad tališčem parafina, zadržati obliko. Njene lastnosti so v veliki meri odvisne od vsebnosti suhe snovi, sestave prahu, površinsko aktivnih dodatkov in homogenosti. V neki meri je mogoče lastnosti suspenzije prilagoditi zahtevam, vendar je pri tem nujno poznanje zvez med posameznimi parametri. V delu poročamo o rezultatih študidja reoloških lastnosti suspenzije aluminijevega oskida v parafinu z raličnimi dodatki površinsko aktivnih snovi. Pokazali smo odvisnost lastnosti od porazdelitve velikosti delcev in vpliva površinsko aktivnih dodatakov.

oai:repox.nuk.uni-lj.si:materiali:ef0fa1bc-72b9-4472-8579-cc5c70a582072020-05-14materiali

info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2014 Anžel, Ivan Artiček, Uroš Bojinović, Marko Brunčko, Mihael http://rightsstatements.org/vocab/InC/1.0/ application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-IATQFZZ9 http://www.dlib.si/details/URN:NBN:SI:doc-IATQFZZ9 eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Influence of the working technology on the development of alloys H13-w(Cu) 87.5 %: Vpliv tehnologije izdelave na razvoj zlitine H13-w(Cu) 87,5 %: Most dies in the casting industry for injection moulding are machined from the premium-grade H13 tool steel. They provide excellent performance in terms of mechanical properties and service life; however, these dies are characterised by a relatively low thermal conductivity. The tool-and-die industry is interested in depositing a material of a high thermal conductivity onto steel in order to improve the thermal management and productivity. We have explored the possibility of using copper with a new technology. In this study, the microstructure evolution and mechanical properties are discussed using the Laser Engineered Net ShapingTM (LENSTM) technology. For a better understanding of the solidification, the microstructure of a LENS sample was compared with the microstructure of a reference alloy produced with the ingot-casting technology having the same chemical composition of H13-w(Cu) 87.5 %. We carried out light microscopy, scanning electron microscopy, an EDS microchemical analysis, the tensile test and microhardness testing. The results show a successful fabrication of LENS samples; their microstructure is more homogeneous compared to the castings; they show better mechanical properties and represent a good potential for further development and use. V industriji tlačnega litja se za izdelavo matric orodij pogosto uporablja visokokakovostno orodno jeklo H13, ki ima odlične mehanske lastnosti in dolgo trajnostno dobo, vendar je zanj značilna relativno nizka toplotna prevodnost. Orodjarska industrija želi dodati jeklu material z visoko toplotno prevodnostjo za dosego boljše porazdelitve toplote in večje produktivnosti. Z novo tehnologijo, imenovano Laser Engineered Net ShapingTM (LENSTM), smo raziskali možnost uporabe bakra, spremljali razvoj mikrostrukture ter ugotovili mehanske lastnosti. Za boljše razumevanje strjevanja smo primerjali mikrostrukturo vzorca LENS z mikrostrukturo referenčne zlitine z enako kemijsko sestavo H13-w(Cu) 87,5 %, izdelano s tehnologijo litja. Karakterizacija zlitin je potekala s svetlobno mikroskopijo, vrstično elektronsko mikroskopijo, mikrokemično EDS-analizo, z nateznim preizkusom in merjenjem mikrotrdote. Rezultati kažejo uspešno izdelavo vzorcev LENS, katerih mikrostruktura je bolj homogena in ima boljše mehanske lastnosti v primerjavi z odlitki. Tehnologija LENS je dober potencial za nadaljnji razvoj in uporabo v praksi.

oai:repox.nuk.uni-lj.si:materiali:3a74d8ad-a0b7-4a72-b7cd-dc7360f7c5a42020-05-14materiali

info:eu-repo/semantics/publishedVersion Researchers Students Teachers 2009 Ćurčija, Dušan Mamuzić, Ilija http://rightsstatements.org/vocab/InC/1.0/ application/html application/pdf text/plain info:eu-repo/semantics/altIdentifierISSN/1580-2949 URN:NBN:SI:doc-70ZIU5ZW http://www.dlib.si/details/URN:NBN:SI:doc-70ZIU5ZW eng Inštitut za kovinske materiale in tehnologije Materiali in tehnologije info:eu-repo/semantics/article Schemes of metal-working processes and the related tribological equations of fluid mechanics: Sheme procesov predelave kovin in tribološke enačbe mehanike fluidov zanje: We present a survey of the most frequently used equations for applications in cold drawing and rolling, for smooth and rough surfaces, for the effect of lubricant inertial forces, for more advanced theoretical solutions as well as the equations for cold drawing with a solid lubricant and the combination solid lubricant-emulsion. The compression processes are described using cylindrical coordinates. Also, the basic equations for the flowing of the lubricant on inclined planes related to screw rolling and for the forming of metals with fluids are given. Podan je pregled najbolj pogosto uporabljenih enačb pri hladnem valjanju in vlečenju, za gladke in hrapave površine, za vpliv vztrajnostnih sil, za bolj napredne teoretične rešitve in enačb za vlečenje s trdnim mazivom in kombinacijo trdo mazivo - emulzija. Tlačni procesi so opisani s cilindričnimi koordinatami. Podane so tudi osnovne enačbe za tok maziva na nagnjeni površini, ki se nanašajo na navojno valjanje in za oblikovanje kovine s fluidi. 1779393734862:materiali:oai_dc:250:1620::