A dislocation model for the magnetic field induced shape memory effect in Ni2MnGa

被引：20
|
作者：
Rajasekhara, S [1 ]
Ferreira, PJ [1 ]
机构：
[1] Univ Texas, Mat Sci & Engn Program, Austin, TX 78712 USA
来源：
SCRIPTA MATERIALIA | 2005年 / 53卷 / 07期
关键词：
shape memory alloys; magnetic field; dislocations; twinning;
D O I：
10.1016/j.scriptamat.2005.06.003
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The magnetically driven shape memory effect in Ni2MnGa body-centered tetragonal martensite is onset by the motion of 0.144 111 type twin dislocations on the {112} type planes. Calculations show that the application of a 400 kA/m magnetic field can induce a shear stress of approximately 2.8 MPa on these twin dislocations, a value exceeding the Peierls and the yield stress for Ni2MnGa. (c) 2005 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：817 / 822
页数：6
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