The microstructure and martensitic transformation of Co-Ni-Ga-Ta ferromagnetic shape memory alloys

被引：16
作者：
Liu, J [1 ]
Zheng, HX [1 ]
Xia, MX [1 ]
Li, JG [1 ]
机构：
[1] Shanghai Jiao Tong Univ, Sch Mat Sci & Engn, Shanghai 200030, Peoples R China
来源：
SCRIPTA MATERIALIA | 2005年 / 52卷 / 10期
基金：
中国国家自然科学基金;
关键词：
ferromagnetic shape memory alloys; martensitic transformation; microstructure;
D O I：
10.1016/j.scriptamat.2005.01.041
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The effect of the fourth element Ta on the microstructure, crystal structure and microstructure transformation Of (Co45Ni25Ga30)1 Ta--x(x)(x = 0, 0.5,2,5) alloys was investigated. Some Ta-rich precipitates were observed in the higher Ta-addition samples, which lead to the decrease of the martensitic transformation temperatures and thermal hysteresis. In addition, 1423 K annealing temperature is not high enough to impede the presence of gamma-phase in Co-Ni-Ga-Ta alloys, and 1473 K heat treatment temperature is needed. (c) 2005 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：955 / 958
页数：4
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