Superplasticity of multi-directional impact forged Mg-Gd-Y-Zr alloy

IMR OpenIR

	Superplasticity of multi-directional impact forged Mg-Gd-Y-Zr alloy
	Li, J. L.; Wu, D.; Yang, Q. B.; Chen, R. S.; Wu, D; Chen, RS (reprint author), Chinese Acad Sci, Inst Met Res, Grp Magnesium Alloys & Their Applicat, 62 Wencui Rd, Shenyang 110016, Peoples R China.
	2016-07-05
发表期刊	JOURNAL OF ALLOYS AND COMPOUNDS
ISSN	0925-8388
卷号	672 页码:27-35
摘要	A novel multi-directional impact forging (MDIF) process was successfully applied to a Mg-Gd-Y-Zr alloy and the superplasticity of the MDIFed alloy was investigated. It was shown that the initial microstructure after MDIF had a unique characteristic of coarse grains decorated by profuse tension twins. Tensile tests at various temperatures and initial strain rates displayed that the MDIFed alloy exhibited superplasticity at temperatures higher than 400 degrees C, especially the maximum elongation of about 300% was achieved at 450 degrees C and 5 x 10(-4) s(-1). It was observed that the initial twin lamellas diminished and even vanished with the occurrence of static recrystallization (SRX) during preheating. The detailed microstructural analysis revealed that SRX during preheating and dynamic recrystallization (DRX) during tensile testing conduced to the superplasticity. With strain rate sensitivity exponent m-value of about 0.32, the superplastic deformation mechanism was supposed to be predominated by glide-controlled dislocation creep assisted by grain boundaries sliding. (C) 2016 Elsevier B.V. All rights reserved.
部门归属	[li, j. l. ; wu, d. ; yang, q. b. ; chen, r. s.] chinese acad sci, inst met res, grp magnesium alloys & their applicat, 62 wencui rd, shenyang 110016, peoples r china
关键词	Forging Mg-gd-y-zr Alloy Superplasticity Recrystallization
学科领域	Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering
资助者	National Natural Science Foundation of China (NSFC) [51301173, 51531002]; National Basic Research Program of China (973 Program) [2013CB632202]
收录类别	sci
语种	英语
WOS记录号	WOS:000373464000005
引用统计	被引频次：26[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/321006/75800
专题	中国科学院金属研究所
通讯作者	Wu, D; Chen, RS (reprint author), Chinese Acad Sci, Inst Met Res, Grp Magnesium Alloys & Their Applicat, 62 Wencui Rd, Shenyang 110016, Peoples R China.
推荐引用方式 GB/T 7714	Li, J. L.,Wu, D.,Yang, Q. B.,et al. Superplasticity of multi-directional impact forged Mg-Gd-Y-Zr alloy[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2016,672:27-35.
APA	Li, J. L.,Wu, D.,Yang, Q. B.,Chen, R. S.,Wu, D,&Chen, RS .(2016).Superplasticity of multi-directional impact forged Mg-Gd-Y-Zr alloy.JOURNAL OF ALLOYS AND COMPOUNDS,672,27-35.
MLA	Li, J. L.,et al."Superplasticity of multi-directional impact forged Mg-Gd-Y-Zr alloy".JOURNAL OF ALLOYS AND COMPOUNDS 672(2016):27-35.