Phase stability comparison by first principle calculation and experimental observation of microstructure evolution in a Mg-6Gd-2Zn(wt%) alloy

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	Phase stability comparison by first principle calculation and experimental observation of microstructure evolution in a Mg-6Gd-2Zn(wt%) alloy
	L. Lin ; P. Liang ; L. Yang ; L. J. Chen ; Z. Liu ; Y. M. Wang
刊名	Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing
	2010
卷号	527 期号:10-11 页码:2643-2648
关键词	Magnesium alloy Heat-treatment Microstructure evolution Phase transformation Ab initio calculation period ordered structure transmission electron-microscopy total-energy calculations mg-gd alloys y-zr alloys high-temperature mechanical-properties precipitate phases tensile properties wt.percent alloy
ISSN号	0921-5093
中文摘要	The microstructure of a Mg-6Gd-2Zn(wt%) alloy was investigated by SEM and TEM observations; phase stability comparison was performed by first principle calculation. The long periodic structure (LPS) was found to be transformed from the Mg(3)Gd phase when subjected to solution treatment at 723 K for 6 h plus aging treatment at 633 K for 8 h. When aged at 503 K for 36 h after solution treatment, the LPS phase transformed to the much more stable Mg(3)Gd phase. The calculations of cohesive energy and formation enthalpy shown that the Mg(3)Gd phase is more stable in comparison with the LPS phase; the analyses on DOS (density of states) distributions proved that Zn alloying makes the LPS phase less stable due to p-d hybridization of valence electrons. (C) 2010 Elsevier B.V. All rights reserved.
原文出处	://WOS:000276137600026
公开日期	2012-04-13
内容类型	期刊论文
源URL	[http://210.72.142.130/handle/321006/31263]
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	L. Lin,P. Liang,L. Yang,et al. Phase stability comparison by first principle calculation and experimental observation of microstructure evolution in a Mg-6Gd-2Zn(wt%) alloy[J]. Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,2010,527(10-11):2643-2648.
APA	L. Lin,P. Liang,L. Yang,L. J. Chen,Z. Liu,&Y. M. Wang.(2010).Phase stability comparison by first principle calculation and experimental observation of microstructure evolution in a Mg-6Gd-2Zn(wt%) alloy.Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,527(10-11),2643-2648.
MLA	L. Lin,et al."Phase stability comparison by first principle calculation and experimental observation of microstructure evolution in a Mg-6Gd-2Zn(wt%) alloy".Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing 527.10-11(2010):2643-2648.