Improvement of high strain rate and room temperature superplasticity in Zn-22Al alloy by two-step equal-channel angular pressing

IMR OpenIR

	Improvement of high strain rate and room temperature superplasticity in Zn-22Al alloy by two-step equal-channel angular pressing
	M.; Purcek Demirtas, G.; Yanar, H.; Zhang, Z. J.; Zhang, Z. F.
	2015
发表期刊	Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing
ISSN	0921-5093
卷号	620 页码:233-240
摘要	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 (UFG) microstructure with an average grain size of 200 nm as the lowest one obtained so far after ECAP processing of this alloy. Also, agglomerate- and texture-free microstructure with UFG Al-rich alpha- and Zn-rich eta-grains separated mostly by high-angle grain boundaries (HAGBs) was produced by this process. The maximum RT elongation was achieved to be 400% with a strain rate sensitivity of 0.30 at a very high strain rate of 5 x 10(-2) s(-1) after the two-step ECAP process. This elongation value is the highest one obtained at RT and at all strain rates for this alloy up to now. The current results demonstrate that such an improvement in superplasticity of Zn-22Al alloy after the two-step ECAP process can enhance its applications where RT and HSR superplasticity are strongly needed. (C) 2014 Elsevier B.V. All rights reserved.
部门归属	[demirtas, m.] karadeniz tech univ, dept mech engn, tr-61080 trabzon, turkey. [purcek, g. ; yanar, h.] karadeniz tech univ, dept mech engn, tr-61080 trabzon, turkey. [zhang, z. j. ; zhang, z. f.] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china. ; purcek, g (reprint author), karadeniz tech univ, dept mech engn, tr-61080 trabzon, turkey. ; purcek@ktu.edu.tr
关键词	Zn-22al Alloy High Strain Rate Superplasticity Ultrafine-grained Materials High-pressure Torsion Zn-22-percent Al-alloy Severe Plastic-deformation Eutectoid Alloy Microstructural Evolution Achieving Superplasticity Mechanical-properties Zn Alloy Extrusion Behavior
URL	查看原文
语种	英语
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/73781
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	M.,Purcek Demirtas, G.,Yanar, H.,et al. Improvement of high strain rate and room temperature superplasticity in Zn-22Al alloy by two-step equal-channel angular pressing[J]. Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,2015,620:233-240.
APA	M.,Purcek Demirtas, G.,Yanar, H.,Zhang, Z. J.,&Zhang, Z. F..(2015).Improvement of high strain rate and room temperature superplasticity in Zn-22Al alloy by two-step equal-channel angular pressing.Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,620,233-240.
MLA	M.,et al."Improvement of high strain rate and room temperature superplasticity in Zn-22Al alloy by two-step equal-channel angular pressing".Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing 620(2015):233-240.