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

页码：817 / 822

页数：6

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