Yazar "Demirtas M." için Araştırma Çıktıları | TR-Dizin | WoS | Scopus | PubMed listeleme
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Achieving room temperature superplasticity in Zn-5Al alloy at high strain rates by equal-channel angular extrusion
Demirtas M.; Purcek G.; Yanar H.; Zhang Z.J.; Zhang Z.F. (Elsevier Ltd, 2015)Multi-pass equal-channel angular extrusion/pressing (ECAE/P) was applied to the eutectic Zn-5Al alloy to achieve high strain-rate (HSR) superplasticity in that alloy at room temperature (RT) by producing ultrafine-grained ... -
Effect of different processes on lamellar-free ultrafine grain formation, room temperature superplasticity and fracture mode of Zn-22Al alloy
Demirtas M.; Purcek G.; Yanar H.; Zhang Z.J.; Zhang Z.F. (Elsevier Ltd, 2016)The Zn-22 wt.%Al was processed using five different selected routes including thermal, thermo-mechanical and severe plastic deformation (SPD) techniques in order to produce ultrafine grained (UFG) microstructure for achieving ... -
Effect of equal-channel angular pressing on room temperature superplasticity of quasi-single phase Zn-0.3Al alloy
Demirtas M.; Purcek G.; Yanar H.; Zhang Z.J.; Zhang Z.F. (Elsevier Ltd, 2015)Quasi-single phase (dilute) Zn-0.3Al alloy was subjected to severe plastic deformation via equal-channel angular extrusion/pressing (ECAE/P), and the effects of ECAP on its room temperature (RT) and high strain rate (HSR) ... -
Effect of grain refinement and phase composition on room temperature superplasticity and damping capacity of dual-phase Zn-Al alloys
Demirtas M.; Atli K.C.; Yanar H.; Purcek G. (Cambridge University Press, 2018)The effects of grain refinement and phase composition on superplasticity and damping capacity of eutectic Zn-5Al and eutectoid Zn-22Al alloys were investigated. For grain refinement, equal-channel angular pressing (ECAP) ... -
Effect of natural aging on RT and HSR superplasticity of ultrafine grained Zn-22Al alloy
Demirtas M.; Purcek G.; Yanar H.; Zhang Z.; Zhang Z.-F. (Trans Tech Publications Ltd, 2016)Zn–22Al alloy was processed using a well-designed two-step equal channel angular extrusion/pressing (ECAE/P), and ultrafine-grained (UFG) microstructure with 200 nm grain size was achieved. UFG Zn-22Al was subjected to ... -
Effect of resin content on tribological behavior of brake pad composite material
Yanar H.; Ayar H.H.; Demirtas M.; Purcek G. (Emerald Group Publishing Ltd., 2018)Purpose: This paper aims to investigate the effect of straight phenolic resin content on the fade behavior, frictions and wear characteristics of pre-determined brake pad composite matrix having specific amount of barite ... -
Effects of grain size on room temperature deformation behavior of Zn–22Al alloy under uniaxial and biaxial loading conditions
Cetin M.E.; Demirtas M.; Sofuoglu H.; Cora Ö.N.; Purcek G. (Elsevier Ltd, 2016)Effects of grain size on room temperature (RT) deformation behavior of superplastic Zn–22Al alloy under uniaxial and biaxial loading conditions were investigated. Two–step equal channel angular pressing (ECAP) and subsequent ... -
Enhancing the Damping Behavior of Dilute Zn-0.3Al Alloy by Equal Channel Angular Pressing
Demirtas M.; Atli K.C.; Yanar H.; Purcek G. (Springer Boston, 2017)The effect of grain size on the damping capacity of a dilute Zn-0.3Al alloy was investigated. It was found that there was a critical strain value (?1 × 10 ?4 ) below and above which damping of Zn-0.3Al showed dynamic and ... -
High temperature superplasticity and deformation behavior of naturally aged Zn-Al alloys with different phase compositions
Demirtas M.; Kawasaki M.; Yanar H.; Purcek G. (Elsevier Ltd, 2018)Two Zn-Al alloys, eutectoid Zn-22Al and dilute Zn-0.3Al, were processed through equal-channel angular pressing (ECAP). The ECAP-processed alloys were subjected to long-term natural aging at room temperature for 120 days ... -
Improvement of high strain rate and room temperature superplasticity in Zn-22Al alloy by two-step equal-channel angular pressing
Demirtas M.; Purcek G.; Yanar H.; Zhang Z.J.; Zhang Z.F. (Elsevier Ltd, 2014)The Zn-22Al alloy was subjected to equal-channel angular pressing (ECAP) to improve its high strain rate (HSR) superplasticity at room temperature (RT). A well-designed two-step ECAP process formed an ultrafine-grained ... -
Influence of high pressure torsion-induced grain refinement and subsequent aging on tribological properties of Cu-Cr-Zr alloy
Purcek G.; Yanar H.; Shangina D.V.; Demirtas M.; Bochvar N.R.; Dobatkin S.V. (Elsevier Ltd, 2018)Effects of ultrafine grain formation via high pressure torsion (HPT) and precipitation during aging on the microstructure, mechanical and tribological properties of a Cu-Cr-Zr alloy have been investigated systematically. ... -
Optimization of RT superplasticity of UFG Zn-22Al alloy by applying ECAP at different temperatures and phase regions
Demirtas M.; Yanar H.; Purcek G. (Institute of Physics Publishing, 2017)Zn-22Al alloy was subjected to either one-step or two-step equal channel pressing (ECAP) to investigate the effect of processing temperature on its microstructure and room temperature (RT) superplasticity. In one-step ECAP ... -
Optimization of strength, ductility and electrical conductivity of Cu-Cr-Zr alloy by combining multi-route ECAP and aging
Purcek G.; Yanar H.; Demirtas M.; Alemdag Y.; Shangina D.V.; Dobatkin S.V. (Elsevier Ltd, 2016)Properties of Cu-Cr-Zr alloy with ultrafine-grained (UFG) structure produced by equal-channel angular pressing (ECAP) via different routes have been investigated. Special attention was paid to the optimization of ... -
Room temperature superplasticity in fine/ultrafine-grained Zn-Al alloys with different phase compositions
Demirtas M.; Yanar H.; Saray O.; Purcek G. (Trans Tech Publications Ltd, 2018)Three Zn-Al alloys, namely Zn-22Al, Zn-5Al and Zn-0.3Al, were subjected to equal-channel angular pressing (ECAP), and the effect of ECAP on their microstructure and room temperature (RT) superplastic behavior were investigated ...