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
收藏
页码：764 / 768
页数：5
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