Twin boundary structure of the modulated variants in a Ni-Mn-Ga alloy

被引：11

作者：

Han, M. ^{[1
]}

Kong, F. F. ^{[1
]}

机构：

[1] Shandong Univ Technol, Sch Mech Engn, Zibo 255049, Shandong, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2008年 / 458卷 / 1-2期

关键词：

phase transitions; shape memory; microstructure; atomic scale structure; transmission electron microscopy;

D O I：

10.1016/j.jallcom.2007.04.025

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：

The micro structure of a Ni-Mn-Ga ferromagnetic shape memory alloy has been characterized by transmission electron microscopy. Electron diffraction reveals that the microstructure of the alloy predominately consists of seven-layer modulated martensite. There exists reflection-twinned relation between the martensitic variants. It is found that there are parallel and equidistant fringes at the boundary. The nature of these fringes is discussed and the results show that the boundary fringes are caused by the elastic strains associated with the coherent interface. (c) 2007 Elsevier B.V All rights reserved.

引用

页码：218 / 222

页数：5

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