Differently mobile twin boundaries and magnetic shape memory effect in 10 M martensite of Ni-Mn-Ga

被引：16
|
作者：
Heczko, O. [1 ]
Kopecek, J. [1 ]
Straka, L. [2 ]
Seiner, H. [3 ]
机构：
[1] Inst Phys ASCR, Dept Funct Mat, Prague, Czech Republic
[2] Aalto Univ, Sch Engn, Lab Engn Mat, Helsinki, Finland
[3] Inst Thermomech ASCR, Lab Ultrason Methods, Prague, Czech Republic
来源：
MATERIALS RESEARCH BULLETIN | 2013年 / 48卷 / 12期
基金：
芬兰科学院;
关键词：
Intermetallic compounds; Crystal growth; X-ray diffraction; Mechanical properties; Microstructure; Magnetic properties; NI2MNGA SINGLE-CRYSTALS; TEMPERATURE-DEPENDENCE; FIELD; STRESS; STRAIN; ALLOYS; DEFORMATION; INTERFACE; PHASE;
D O I：
10.1016/j.materresbull.2013.04.034
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We investigated twin boundaries with sharply different mobility or twinning stress in five-layered modulated (10 M) martensite of Ni-Mn-Ga exhibiting magnetic shape memory effect or magnetically induced reorientation. Different mobility is ascribed to the different microstructures of the macrotwin planar interface. In monoclinic approximation the mobile boundaries are of Type 1 and Type 11 with complex microstructure of adjoining variants. These boundaries respond differently to magnetic field. For Type II boundary the reorientation takes place at very low field 250 Oe. (C) 2013 Elsevier Ltd. All rights reserved.
引用
收藏
页码：5105 / 5109
页数：5
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