Preparation and characterization of ferromagnetic shape memory alloys

被引：1

作者：

Gupta, P

Robi, PS ^{[1
]}

Singha, PP

Srinivasan, A

机构：

[1] Indian Inst Technol, Dept Mech Engn, N Guwahati 781039, India

[2] Indian Inst Technol, Dept Phys, Gauhati 781039, India

来源：

JOURNAL OF MATERIALS PROCESSING TECHNOLOGY | 2004年 / 153卷

关键词：

FSMA; Ni-Mn-Ga; polycrystalline; microstructure;

D O I：

10.1016/j.jmatprotec.2004.04.364

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Ferromagnetic shape memory (FSM) alloy of Ni2MnGa was prepared by melt casting technique. Equiaxed grained and columnar structures were obtained. The structure of the cast alloy revealed a twinned structure. In situ study of the structure during heating revealed the martensitic to austenitic transformation taking place in the temperature range of 160-300 degreesC. At temperatures above 550 degreesC, a second reaction was found to take place. The activation energy for this reaction was determined to be 80 kJ/mol by differential scanning calorimeter (DSC). The field-induced strain for the material in the polycrystalline form was 0.18 x 10(-4) at room temperature. (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：965 / 970

页数：6

共 8 条

[1] Thermomechanical behavior of 55Ni45Ti nitinol [J].