Ductility drop of the solutionized Mg-Gd-Y-Zr alloy during tensile deformation at 350 degrees C

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	Ductility drop of the solutionized Mg-Gd-Y-Zr alloy during tensile deformation at 350 degrees C
	Li, J. L. ; Wang, X. X. ; Zhang, N. ; Wu, D. ; Chen, R. S.
刊名	JOURNAL OF ALLOYS AND COMPOUNDS
	2017-08-15
卷号	714 页码:104-113
关键词	Magnesium alloy Hot tension Ductility Grain boundary precipitation Fracture
ISSN号	0925-8388
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.
中文摘要	The effect of temperature and strain rate on tensile ductility of a solutionized Mg-Gd-Y-Zr alloy was investigated using uniaxial tensile testing. The result revealed an interesting phenomenon that with the increment of temperature, this alloy exhibited drop of ductility at 350 degrees C along with intergranular fracture. Detailed microstructure observation manifested that local precipitation at grain boundary due to holding process before tension was responsible for the grain boundary embrittlement at 350 degrees C. It was thought that plastic deformation preferentially occurred at the softer solute-depleted zones concurrent with grain boundary precipitates (GBPs), whereas dislocation movement would be effectively inhibited at the hard GBPs, inducing stress concentration and cracking along grain boundary as the solute-depleted zone deformed to its plastic limit. Moreover, it should be noted that the ductility at 350 degrees C was closely related to the holding time which significantly determined the size and distribution of precipitates. The occurrence of local grain boundary precipitation dependent on temperature and time was predominantly attributed to RE elements segregation to grain boundary. (C) 2017 Elsevier B.V. All rights reserved.
学科主题	Chemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
收录类别	SCI
资助信息	National Natural Science Foundation of China (NSFC) [51301173, 51531002, 51601193]; National Basic Research Program of China (973 Program) [2013CB632202]; National Key Research and Development Program of China [2016YFB0301104]
语种	英语
公开日期	2017-08-17
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/78021]
专题	金属研究所_中国科学院金属研究所
推荐引用方式 GB/T 7714	Li, J. L.,Wang, X. X.,Zhang, N.,et al. Ductility drop of the solutionized Mg-Gd-Y-Zr alloy during tensile deformation at 350 degrees C[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2017,714:104-113.
APA	Li, J. L.,Wang, X. X.,Zhang, N.,Wu, D.,&Chen, R. S..(2017).Ductility drop of the solutionized Mg-Gd-Y-Zr alloy during tensile deformation at 350 degrees C.JOURNAL OF ALLOYS AND COMPOUNDS,714,104-113.
MLA	Li, J. L.,et al."Ductility drop of the solutionized Mg-Gd-Y-Zr alloy during tensile deformation at 350 degrees C".JOURNAL OF ALLOYS AND COMPOUNDS 714(2017):104-113.