Microstructure evolution of the undercooled Co-Ni-Ga magnetic shape memory alloy

被引：5
作者：
Li, Junzheng [1 ]
Li, Jianguo [1 ]
机构：
[1] Shanghai Jiao Tong Univ, Sch Mat Sci & Engn, Shanghai 200240, Peoples R China
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2011年 / 509卷 / 05期
关键词：
Undercooling; Sub-grain; Co-Ni-Ga; Magnetic shape memory alloy; PHASE-TRANSFORMATIONS; GRAIN-REFINEMENT; ALUMINUM-ALLOY; MAGNETOSTRICTION;
D O I：
10.1016/j.jallcom.2010.10.080
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：
Microstructure evolution of the martensite Co(50)Ni(22)Ga(28) magnetic shape memory alloy was investigated by the method of glass fluxing combined with superheating cycling. A maximum bulk undercooling of 220 K is achieved and a mass of sub-grains are introduced by the undercooling. A number of dislocations and large internal stress, due to the undercooling rapid solidification, give rise to the production of subgrains during the recovery process. These sub-grains, as well as martensite variants, are remarkably refined with the increase of undercooling. The recrystallization and growth of sub-grains during the following annealing are also discussed. (C) 2010 Elsevier B.V. All rights reserved.
引用
收藏
页码：1563 / 1566
页数：4
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