Superplastic behaviors of a Mg-Zn-Y-Zr alloy processed by extrusion and equal channel angular extrusion

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	Superplastic behaviors of a Mg-Zn-Y-Zr alloy processed by extrusion and equal channel angular extrusion
	W. N. Tang; R. S. Chen; E. H. Han
	2009
发表期刊	Journal of Alloys and Compounds
ISSN	0925-8388
卷号	477 期号:1-2 页码:636-643
摘要	Superplastic deformation (SPD) behaviors of a Mg-5.8%Zn-1.0%Y-0.48%Zr alloys produced by conventional extrusion and equal channel angular extrusion (ECAE) methods, respectively, have been comparatively studied in this paper. It is found that the optimum superplastic condition in as-extruded alloy was obtained at 450 degrees C and 3.3 X 10(-4) s(-1) with the largest elongation to failure about 450%; while in as-ECAEed alloy it was at 350 degrees C and 1.7 x 10(-3) s(-1) with about 800% elongation. Microstructural observations showed that structure evolution and cavity formation behaviors were different in these two materials during SPD. The probable mechanisms for superplasticity such as grain boundary sliding (GBS) and dynamic recrystallization (DRX) under different deformation conditions were discussed in terms of strain rate sensitivity, activation energy, as well as microstructural evolution. (c) 2008 Elsevier B.V. All rights reserved.
部门归属	[tang, w. n.; chen, r. s.; han, e. h.] chinese acad sci, state key lab corros & protect, inst met res, shenyang 110016, peoples r china. [tang, w. n.] chinese acad sci, grad sch, beijing, peoples r china.;chen, rs (reprint author), chinese acad sci, state key lab corros & protect, inst met res, shenyang 110016, peoples r china;rongshichen@yahoo.com
关键词	Mg-zn-y-zr Alloy Extrusion Ecae Inhomogeneous Microstructure Superplasticity High-temperature Deformation Quasi-crystalline Particles Az91 Magnesium Alloy 2-stage Deformation Az31 Evolution Sheet Flow
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WOS记录号	WOS:000266386400127
引用统计	被引频次：39[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/321006/32324
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	W. N. Tang,R. S. Chen,E. H. Han. Superplastic behaviors of a Mg-Zn-Y-Zr alloy processed by extrusion and equal channel angular extrusion[J]. Journal of Alloys and Compounds,2009,477(1-2):636-643.
APA	W. N. Tang,R. S. Chen,&E. H. Han.(2009).Superplastic behaviors of a Mg-Zn-Y-Zr alloy processed by extrusion and equal channel angular extrusion.Journal of Alloys and Compounds,477(1-2),636-643.
MLA	W. N. Tang,et al."Superplastic behaviors of a Mg-Zn-Y-Zr alloy processed by extrusion and equal channel angular extrusion".Journal of Alloys and Compounds 477.1-2(2009):636-643.