Superplasticity of Mg-5.8Zn-1Y-Zr alloy sheet fabricated by combination of extrusion and hot-rolling processes

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	Superplasticity of Mg-5.8Zn-1Y-Zr alloy sheet fabricated by combination of extrusion and hot-rolling processes
	H. Yan; R. S. Chen; E. H. Han
	2009
发表期刊	Science in China Series E-Technological Sciences
ISSN	1006-9321
卷号	52 期号:1 页码:166-171
摘要	Superplastic behaviors of quasicrystal phase containing Mg-5.8Zn-1Y-0.48Zr alloy sheets fabricated by combination of extrusion and hot-rolling processes have been investigated at temperature ranging from 623 to 753 K and at the strain rates ranging from 10(-4) to 10(-2) s(-1) by uniaxial tensile tests. An excellent superplasticity with the maximum elongation to failure of 1020% was obtained at 753 K and the strain rate of 1.04 x 10(-3) s(-1) and its strain rate sensitivity, m, is as high as up to 0.75. The microstructure was stable during superplastic deformation due to the uniformly distributed fine quasicrystal particles. In addition, micro-cavities and their coalescences were observed in the superplastic deformation of the ZW61 magnesium alloy. Grain boundary sliding (GBS) was considered to be the main deformation mechanism during the superplastic deformation. Dislocation creep controlled by atom diffusion through grain boundaries or interior grains is suggested mainly to accommodate the GBS in superplastic deformation.
部门归属	[yan hong; chen rongshi; han enhou] chinese acad sci, met res inst, state key lab corros & protect, shenyang 110016, peoples r china. [yan hong] chinese acad sci, grad univ, beijing 100049, peoples r china.;chen, rs (reprint author), chinese acad sci, met res inst, state key lab corros & protect, shenyang 110016, peoples r china;rschen@imr.ac.cn
关键词	Magnesium Alloy Quasicrystal Microvoid Superplasticity Zn-y Alloys Quasi-crystalline Particles Elevated-temperatures Magnesium Alloy Deformation Mechanisms Creep-behavior Cavity Growth Hcp Metals Mg Phase
URL	查看原文
WOS记录号	WOS:000262485100030
引用统计	被引频次：13[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/321006/32470
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	H. Yan,R. S. Chen,E. H. Han. Superplasticity of Mg-5.8Zn-1Y-Zr alloy sheet fabricated by combination of extrusion and hot-rolling processes[J]. Science in China Series E-Technological Sciences,2009,52(1):166-171.
APA	H. Yan,R. S. Chen,&E. H. Han.(2009).Superplasticity of Mg-5.8Zn-1Y-Zr alloy sheet fabricated by combination of extrusion and hot-rolling processes.Science in China Series E-Technological Sciences,52(1),166-171.
MLA	H. Yan,et al."Superplasticity of Mg-5.8Zn-1Y-Zr alloy sheet fabricated by combination of extrusion and hot-rolling processes".Science in China Series E-Technological Sciences 52.1(2009):166-171.