Effect of different processes on lamellar-free ultrafine grain formation, room temperature superplasticity and fracture mode of Zn-22Al alloy

IMR OpenIR

	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.; purcek@ktu.edu.tr
	2016
发表期刊	JOURNAL OF ALLOYS AND COMPOUNDS
ISSN	0925-8388
卷号	663 页码:775-783
摘要	The Zn-22 wt.% Al was processed using five different selected routes including thermal, thermomechanical and severe plastic deformation (SPD) techniques in order to produce ultrafine grained (UFG) microstructure for achieving room temperature (RT) and high strain rate (HSR) superplasticity, and to compare the same set of the results. After all routes, the microstructural evolutions and RT uniaxial tensile tests at different strain rates ranging from 1 x 10(-3) to 1 x 10(0) s(-1) were investigated. The smallest grain size was achieved to be 300 nm after the thermo-mechanical process including conventional hot and cold rolling steps. However, the lamellar microstructure of the alloy was not completely eliminated during that process. On the other hand, equal-channel angular pressing (ECAP) as one of the SPD techniques decreased the grain size down to 400 nm with a lamellar-free microstructure. The maximum elongation value was achieved to be 330% with the sample tested at 1 x 10(-3) s(-1) after a thermomechanical process including conventional hot and cold rolling, and an aging stage between these rolling steps. It was found that lamellar-free microstructure causes higher superplastic elongation even if it has higher grain size compared to the sample having partially lamellar structure. (C) 2015 Elsevier B.V. All rights reserved.
部门归属	[demirtas, m.] bayburt univ, dept mech engn, tr-69000 bayburt, 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
关键词	Zn-22al Alloy Superplasticity Ufg Materials Severe Plastic Deformation
资助者	Scientific Research Projects of Karadeniz Technical University, Turkey [10501]
收录类别	sci
语种	英语
WOS记录号	WOS:000369060200104
引用统计	被引频次：29[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/74744
专题	中国科学院金属研究所
通讯作者	purcek@ktu.edu.tr
推荐引用方式 GB/T 7714	Demirtas, M.,Purcek, G.,Yanar, H.,et al. Effect of different processes on lamellar-free ultrafine grain formation, room temperature superplasticity and fracture mode of Zn-22Al alloy[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2016,663:775-783.
APA	Demirtas, M.,Purcek, G.,Yanar, H.,Zhang, Z. J.,Zhang, Z. F.,&purcek@ktu.edu.tr.(2016).Effect of different processes on lamellar-free ultrafine grain formation, room temperature superplasticity and fracture mode of Zn-22Al alloy.JOURNAL OF ALLOYS AND COMPOUNDS,663,775-783.
MLA	Demirtas, M.,et al."Effect of different processes on lamellar-free ultrafine grain formation, room temperature superplasticity and fracture mode of Zn-22Al alloy".JOURNAL OF ALLOYS AND COMPOUNDS 663(2016):775-783.