A Comparative Study of Elastic Constants of NiTi and NiAl Alloys from First-Principle Calculations

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	A Comparative Study of Elastic Constants of NiTi and NiAl Alloys from First-Principle Calculations
	J. M. Lu; Q. M. Hu; R. Yang
	2009
发表期刊	Journal of Materials Science & Technology
ISSN	1005-0302
卷号	25 期号:2 页码:215-218
摘要	To investigate the origin of the strong dependence of martensitic transformation temperature on composition, the elastic properties of high temperature 132 phases of both NiTi and NiAl were calculated by a first-principle method, the exact-muffin orbital method within coherent potential approximation. In the composition range of 50-56 at. pct Ni of NiTi and 60-70 at. pct Ni of NiAl in which martensitic transformation occurs, non-basal-plane shear modulus C(44) increases with increasing Ni content, while basal-plane shear modulus c' decreases. In the above composition ranges however the transformation temperature of NiAl increases with increasing Ni content while that of NiTi decreases from experimental observation. The softening of c' is experimentally observed only in NiAl, and the decrease of c' with increasing Ni content is responsible for the increase of transformation temperature. The result of the present work demonstrates that, besides c', C(44) also influences the martensitic transformation of NiTi and plays quite important a role.
部门归属	[lu, jianmin; hu, qingmiao; yang, rui] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china.;lu, jm (reprint author), chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china;jmlv@imr.ac.cn
关键词	Niti Nial Elastic Constant First-principle Calculation Shape Memory Alloys Martensitic-transformation Tini Al
URL	查看原文
WOS记录号	WOS:000264990700015
引用统计	被引频次：8[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/321006/32149
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	J. M. Lu,Q. M. Hu,R. Yang. A Comparative Study of Elastic Constants of NiTi and NiAl Alloys from First-Principle Calculations[J]. Journal of Materials Science & Technology,2009,25(2):215-218.
APA	J. M. Lu,Q. M. Hu,&R. Yang.(2009).A Comparative Study of Elastic Constants of NiTi and NiAl Alloys from First-Principle Calculations.Journal of Materials Science & Technology,25(2),215-218.
MLA	J. M. Lu,et al."A Comparative Study of Elastic Constants of NiTi and NiAl Alloys from First-Principle Calculations".Journal of Materials Science & Technology 25.2(2009):215-218.