Strengthening of gamma-TiAl-Nb by short-range ordering of point defects

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	Strengthening of gamma-TiAl-Nb by short-range ordering of point defects
	Y. J. Li; Q. M. Hu; D. S. Xu; R. Yang
	2011
发表期刊	Intermetallics
ISSN	0966-9795
卷号	19 期号:6 页码:793-796
摘要	The origin of the superior high temperature strength of Ti-rich gamma-TiAl with addition of Nb is a highly controversial issue. In this paper, we calculated the interaction energies between point defects in these alloys using a first-principles plane-wave pseudopotential method. It is found that, the nearest neighbouring Nb atoms on Al-sublattice (Nb(Al)) repel whereas the next nearest neighbouring Nb(Al) atoms attract each other, indicating that Nb(Al) atoms may form short-range ordered structure. Based on this finding, we propose that the short-range order may be responsible for the high strength of the Ti-rich TiAl-Nb alloys. (C) 2010 Elsevier Ltd. All rights reserved.
部门归属	[li, yu-juan; hu, qing-miao; xu, dong-sheng; yang, rui] shenyang pharmaceut univ, shenyang 110016, peoples r china. [li, yu-juan] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china.;hu, qm (reprint author), shenyang pharmaceut univ, 103 wenhua rd, shenyang 110016, peoples r china;qmhu@imr.ac.cn
关键词	Titanium Aluminide Point Defect Complex First-principles Calculation Solid-solution Strengthening Titanium Aluminides Solid-solutions Alloys Al
URL	查看原文
WOS记录号	WOS:000290779200008
引用统计	被引频次：37[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/321006/30492
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	Y. J. Li,Q. M. Hu,D. S. Xu,et al. Strengthening of gamma-TiAl-Nb by short-range ordering of point defects[J]. Intermetallics,2011,19(6):793-796.
APA	Y. J. Li,Q. M. Hu,D. S. Xu,&R. Yang.(2011).Strengthening of gamma-TiAl-Nb by short-range ordering of point defects.Intermetallics,19(6),793-796.
MLA	Y. J. Li,et al."Strengthening of gamma-TiAl-Nb by short-range ordering of point defects".Intermetallics 19.6(2011):793-796.