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Superplasticity and microstructure in Mg-Gd-Y-Zr rolled sheet

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WOS被引频次:33
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成果类型:
期刊论文
作者:
Li, Li;Zhang, Xinming;Deng, Yunlai;Tang, Changping
通讯作者:
Zhang, XM
作者机构:
[Zhang, Xinming; Deng, Yunlai; Tang, Changping; Li, Li] School of Material Science and Engineering, Central South University, Lushan South Road, Changsha, 410083 Hunan Province, China
[Li, Li] Department of Mechanical Engineering, Hunan Institute of Technology, Hengyang, 421002, China
通讯机构:
[Zhang, XM] Cent S Univ, Sch Mat Sci & Engn, Lushan S Rd, Changsha 410083, Hunan Province, Peoples R China.
语种:
英文
关键词:
Mg-Gd-Y-Zr alloy;Hot rolling;Superplastic mechanism;Second phases
期刊:
Journal of Alloys and Compounds
ISSN:
0925-8388
年:
2009
卷:
485
期:
1-2
页码:
295-299
文献类别:
WOS:Article;EI:Journal article (JA)
所属学科:
ESI学科类别:材料科学;WOS学科类别:Chemistry, Physical;Materials Science, Multidisciplinary;Metallurgy & Metallurgical Engineering
入藏号:
WOS:000271542900070;EI:20095212570945
基金类别:
National Security Basic Research Program [5133001E]
机构署名:
本校为其他机构
院系归属:
机械工程学院
材料与化学工程学院
摘要:
Superplastic behavior and microstructure of the rolled Mg-Gd-Y-Zr alloy sheet with an initial grain size of 66 &mu;m were investigated. For the purposes, tensile tests at various temperatures and strain rates were conducted, which revealed that the sheet exhibited a maximum elongation of 380% at 435 &deg;C and 0.0005 s<sup>-1</sup>. The high ductility was attributed to grain boundary sliding accommodated by dislocation motion assisted by lattice diffusion. It is suggested from microstructural analysis results that the second phases exhibited the significant effect of pinning grain boundaries, and that the &beta;phase was deformed and the strain was partly transferred from the matrix to the &beta;phase. &copy;2009 Elsevier B.V. All rights reserved.
参考文献:
Blandin JJ, 2007, MATER SCI FORUM, V551-552, P211
Frost H. J., 1982, DEFORMATION MECH MAP
Fujii H, 2005, MATER SCI FORUM, V488-489, P571
Gao Y, 2007, MAT SCI ENG A-STRUCT, V459, P117, DOI 10.1016/j.msea.2007.01.057
Kim WJ, 2001, ACTA MATER, V49, P3337, DOI 10.1016/S1359-6454(01)00008-8

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