Twin boundary nucleation and motion in Ni-Mn-Ga magnetic shape memory material with a low twinning stress

被引：44
|
作者：
Aaltio, Ilkka [1 ]
Soderberg, Outi [1 ]
Ge, Yanling [1 ]
Hannula, Simo-Pekka [1 ]
机构：
[1] Helsinki Univ Technol, Dept Mat Sci & Engn, Espoo 02015, Finland
来源：
SCRIPTA MATERIALIA | 2010年 / 62卷 / 01期
基金：
芬兰科学院;
关键词：
Twinning stress; Martensite; Ni-Mn-Ga; Ferromagnetic shape memory; Twinning; FIELD-INDUCED STRAINS; CRYSTAL-STRUCTURE; SINGLE-CRYSTALS; MARTENSITIC PHASES; ALLOYS; NI2MNGA; MODEL; DEFORMATION; VARIANTS;
D O I：
10.1016/j.scriptamat.2009.09.012
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The twin boundary motion in the Ni-Mn-Ga single crystal 10M martensite magnetic shape memory material was studied by mechanical twinning stress and magnetic measurements at ambient temperature. The compressive stress required to trigger the movement of the twin boundaries was higher in the sample with the single variant state than in that with the multivariant state. Magnetometer measurements confirmed that the energy needed to move the twin boundaries in a high-quality single crystal 10M Ni-Mn-Ga is lower than that for the nucleation of a twin boundary. (C) 2009 Acta Matcrialia Inc. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：9 / 12
页数：4
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