Ni56Mn25-xCrxGa19 (x=0, 2, 4, 6) high temperature shape memory alloys

被引：34

作者：

Ma Yun-qing ^{[1
]}

Lai San-li ^{[1
]}

Yang Shui-yuan ^{[1
]}

Luo Yu ^{[1
]}

Wang Cui-ping ^{[1
]}

Liu Xing-jun ^{[1
]}

机构：

[1] Xiamen Univ, Coll Mat, Xiamen 361005, Peoples R China

来源：

TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA | 2011年 / 21卷 / 01期

基金：

中国国家自然科学基金;

关键词：

martensitic transformation; tension; ductility; high-temperature shape-memory effect; PHASE-TRANSFORMATION TEMPERATURES; FIELD-INDUCED STRAIN; MICROSTRUCTURE;

D O I：

10.1016/S1003-6326(11)60683-3

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

The microstructure, martensitic transformation behavior, mechanical and shape memory properties of Ni56Mn25-xCrxGa19 (x=0, 2, 4, 6) alloys were investigated. Single phase of martensite with tetragonal structure is present for x=0, and dual-phase containing martensite and gamma phase is observed for x >= 2. The martensitic transformation peak temperatures decrease monotonically from 401 degrees C for x=0 to 197 degrees C for x=6. The introduction of gamma phase by Cr addition is proved to be effective in improving the workability and ductility. The tensile stress and strain are 497 MPa and 8 % for x=4, and 454 MPa and 5.5 % for x=6, respectively. The shape memory strain values are 2.7 % under a residual strain of 4.5 % for x=4, and 1.9 % under a residual strain of 3.5 % for x=6, respectively.

引用

页码：96 / 101

页数：6

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