Martensitic and magnetic transformation in Ni-Mn-Ga-Co ferromagnetic shape memory alloys

被引：58
|
作者：
Cong, D. Y. [1 ,3 ]
Wang, S. [1 ]
Wang, Y. D. [1 ]
Ren, Y. [2 ]
Zuo, L. [1 ]
Esling, C. [3 ]
机构：
[1] Northeastern Univ, Key Lab Anisotropy & Texture Mat MOE, Shenyang 110004, Peoples R China
[2] Argonne Natl Lab, Xray Sci Div, Argonne, IL 60439 USA
[3] Univ Metz, LETAM, CNRS UMR 7078, F-57045 Metz, France
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2008年 / 473卷 / 1-2期
基金：
中国国家自然科学基金; 高等学校博士学科点专项科研基金;
关键词：
ferromagnetic shape memory alloy; martensitic transformation; crystal structure; Curie temperature; compressive properties; Ni-Mn-Ga-Co alloy;
D O I：
10.1016/j.msea.2007.03.088
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The effect of Co addition on crystal structure, martensitic transformation, Curie temperature and compressive properties of Ni53-xMn25Ga22COx alloys with the Co content up to 14 at.% was investigated. An abrupt decrease of martensitic transformation temperature was observed when the Co content exceeded 6 at.%, which can be attributed to the atomic disorder resulting from the Co addition. Substitution of Co for Ni proved efficient in increasing the Curie temperature. Compression experiments showed that the substitution of 4 at.% Co for Ni did not change the fracture strain, but lead to the increase in the compressive strength and the decrease in the yield stress. This study may offer experimental data for developing high performance ferromagnetic shape memory alloys. (C) 2007 Elsevier B.V. All rights reserved.
引用
收藏
页码：213 / 218
页数：6
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