Microstructure characterization of the non-modulated martensite in Ni-Mn-Ga alloy

被引：18

作者：

Han, M. ^{[1
]}

Bennett, J. C. ^{[2
]}

Gharghouri, M. A. ^{[3
]}

Chen, J. ^{[2
]}

Hyatt, C. V. ^{[4
]}

Mailman, N. ^{[2
]}

机构：

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

[2] Acadia Univ, Dept Phys, Wolfville, NS B0P 1X0, Canada

[3] Natl Res Council Canada, Chalk River Labs, Chalk River, ON, Canada

[4] Def Res & Dev Canada, Dartmouth, NS, Canada

来源：

MATERIALS CHARACTERIZATION | 2008年 / 59卷 / 06期

关键词：

shape memory alloys; martensitic phase transformation; twinning; transmission electron microscopy;

D O I：

10.1016/j.matchar.2007.06.010

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The microstructure of the non-modulated martensite in a Ni-Mn-Ga alloy has been characterized in detail by conventional transmission electron microscopy. Bright field images show that the martensite exhibits an internal substructure consisting of a high density of narrow twins. Using electron diffraction, it is found that the martensite has a tetragonal crystal structure. The lattice correspondence between the parent phase and the non-modulated martensite is investigated. Furthermore, the four twinning elements describing the microtwinning have been graphically and quantitatively determined. The results indicate that the microtwinning within the non-modulated martensite belongs to the compound type. (C) 2007 Published by Elsevier Inc.

引用

页码：764 / 768

页数：5

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