Martensitic Transformation and Microstructure of Ni-Mn-Ga Magnetic Shape Memory Alloy

被引：8
|
作者：
Pushpanathan, K. [1 ]
Santhi, R. [2 ]
Chokkalingam, R. [2 ]
Mahendran, M. [3 ]
机构：
[1] Govt Arts Coll Autonomous, PG & Res Dept Phys, Karur 639005, India
[2] Mahendra Engn Coll, Dept Phys, Mallasamuthram W, India
[3] Thiagarajar Coll Engn, Dept Phys, Smart Mat Lab, Madurai, Tamil Nadu, India
来源：
MATERIALS AND MANUFACTURING PROCESSES | 2012年 / 28卷 / 01期
关键词：
Annealing; Composition; Hysteresis; Martensite; Microstructure; FIELD-INDUCED STRAIN; PHASE-TRANSFORMATION; CRYSTAL-STRUCTURE; TEMPERATURE; TRANSITION; NI2MNGA; SUBSTITUTION; ORDER;
D O I：
10.1080/10426914.2012.682487
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The effect of annealing on microstructure, crystal structure, martensitic transformation temperature, and magnetization of the as-prepared and annealed Ni-Mn-Ga alloy has been investigated. The present study infers that annealing stabilizes the microstructure and reduces the range of martensitic transformation temperature and improves the magnetic properties of the Ni-Mn-Ga ferromagnetic shape memory alloys. Also, the result presented here shows that coexisting austenite and martensite phases in the as-prepared specimen are separated upon annealing. As the magnetic hysteresis of Ni49.5Mn29.3Ga21.2 alloy is very narrow, the potential utilization of this composition may be expected in micro-actuators.
引用
收藏
页码：72 / 78
页数：7
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