Effect of Co additions on B2 phase stability of Ni-poor NiTi-based alloys

被引：7
作者：
Sun, Xiang [1 ]
Nia, Xiao-dong [1 ,2 ]
Shen, Jiang [1 ,2 ]
Chen, Nan-xian [2 ,3 ]
机构：
[1] Univ Sci & Technol Beijing, Dept Phys, Beijing 100083, Peoples R China
[2] Univ Sci & Technol Beijing, Inst Appl Phys, Beijing 100083, Peoples R China
[3] Tsinghua Univ, Dept Phys, Beijing 100084, Peoples R China
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2011年 / 509卷 / 33期
关键词：
NiTi; Computer simulations; Shape memory alloys; Intermetallics; SHAPE-MEMORY ALLOYS; SITE PREFERENCE; MARTENSITIC TRANSFORMATIONS; CRYSTAL; TINI; TRANSITION; BEHAVIOR;
D O I：
10.1016/j.jallcom.2011.05.080
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Based on the generalized atomic site preference model and the quasi-chemical bond approximation, the atomic distribution state free energy of the third addition in a binary alloy with the B2 lattice is derived analytically. The configurational energy coefficients are independent of the alloy composition and can be determined directly by the first principle calculation. The calculated B2 <> bcc transformation temperature of the Ni-poor NiTi-Co alloys changes at 200 K at.%(-1) by the increasing of Co concentration. The experimental results about the effect of the third Co additions on the martensitic transformation procedure of the Ni-poor NiTi-based alloys are well explained. Crown Copyright (C) 2011 Published by Elsevier B. V. All rights reserved.
引用
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页码：8323 / 8326
页数：4
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