Twin stabilization in a ferromagnetic shape memory alloy

被引：4
|
作者：
Dai, Liyang
Wuttig, Manfred [1 ]
Pagounis, Emmanouel
机构：
[1] Univ Maryland, Dept Mat Sci & Engn, College Pk, MD 20742 USA
[2] Helsinki Univ Technol, Dept Mat Sci & Engn, Helsinki, Finland
来源：
SCRIPTA MATERIALIA | 2006年 / 55卷 / 09期
基金：
美国国家科学基金会;
关键词：
ferromagnetic shape memory alloy; aging;
D O I：
10.1016/j.scriptamat.2006.07.031
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The modulus and damping of martensitic Ni49Mn26Ga25 (wt-%) cantilevers that deform by twin motion when bent have been investigated at room temperature. The modulus increases logarithmically as a function of aging time while the damping decreases commensurably. Both changes signal a gradual reduction of the twin boundary mobility. The logarithmic time dependence indicates a wide distribution of relaxation times. This distribution results from the volume dependence of the adaptation kinetics of nano-sized short range ordered clusters to the martensitic symmetry. (c) 2006 Published by Elsevier Ltd. on behalf of Acta Materialia Inc.
引用
收藏
页码：807 / 810
页数：4
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