Martensitic transformation and magnetic properties of Ti-doped NiCoMnSn shape memory alloy

被引：22
作者：
Chen, Feng [1 ]
Tong, Yun-Xiang [1 ,2 ]
Tian, Bing [1 ]
Li, Li [1 ]
Zheng, Yu-Feng [1 ]
机构：
[1] Harbin Engn Univ, Ctr Biomed Mat & Engn, Harbin 150001, Peoples R China
[2] Peking Univ, Coll Engn, Dept Mat Sci & Engn, Beijing 100871, Peoples R China
来源：
RARE METALS | 2014年 / 33卷 / 05期
基金：
中国国家自然科学基金;
关键词：
NiCoMnSn; Shape memory alloy; Martensitic transformation; Magnetic property; MECHANICAL-PROPERTIES; MICROSTRUCTURE;
D O I：
10.1007/s12598-013-0100-7
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Martensitic transformation, microstructure, and magnetic properties of Ti-doped Ni43-x Ti (x) Co7Mn43Sn7 (at%) (x = 0, 0.5, 1.0, 2.0, and 4.0) shape memory alloys were investigated. The results show that transformation temperatures of Ni43Co7Mn43Sn7 can be efficiently adjusted by the substitution of Ti for Ni. For example, the martensitic transformation starting temperature (M (s)) is reduced by about 278 K with 4 at% addition of Ti. Room temperature microstructure evolves from single tetragonal martensite for the Ti-free alloy to dual phases (tetragonal martensite + second phase) with 0.5 at%, 1.0 at%, and 2.0 at% addition of Ti to dual phases (cubic austenite + second phase) for 4.0 at% Ti-doped alloy. The mechanical properties can be obviously improved by adding an appropriate amount of Ti. A noteworthy point is that magnetic-field-induced reverse transformation is observed in Ni39Ti4Co7Mn43Sn7 alloy.
引用
收藏
页码：511 / 515
页数：5
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