Processing Routes Toward Textured Polycrystals in Ferromagnetic Shape Memory Alloys

被引：17

作者：

Gaitzsch, Uwe ^{[1
]}

Chulist, Robert ^{[1
]}

Weisheit, Linda ^{[1
]}

Boehm, Andrea ^{[2
]}

Skrotzki, Werner ^{[3
]}

Oertel, Carl-Georg ^{[1
]}

Brokmeier, Heinz-Guenter ^{[1
]}

Lippmann, Thomas ^{[1
]}

Navarro, Inaki ^{[1
]}

Poetschke, Martin ^{[1
]}

Romberg, Jan ^{[1
]}

Huerrich, Claudia ^{[1
]}

Roth, Stefan ^{[1
]}

Schultz, Ludwig ^{[1
]}

机构：

[1] IFW Dresden, D-01069 Dresden, Germany

[2] Fraunhofer IWU, D-01187 Dresden, Germany

[3] Tech Univ Dresden, Inst Strukturphys, D-01062 Dresden, Germany

来源：

ADVANCED ENGINEERING MATERIALS | 2012年 / 14卷 / 08期

关键词：

FIELD-INDUCED STRAIN; MARTENSITIC TRANSFORMATIONS; MAGNETIC-ANISOTROPY; DEFORMATION; MICROSTRUCTURE; NI50MN30GA20; PHASES; MODEL;

D O I：

10.1002/adem.201200084

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

NiMnGa single crystals can produce large strain in moderate magnetic fields. It is the scope of this article to demonstrate, that also polycrystalline materials can show strain in a magnetic field, so called MFIS (magnetic field-induced strain). In order to design functional polycrystalline materials the interactions of twin boundaries and grain boundaries have to be understood. Therefore, different ways of introducing a texture into NiMnGa polycrystals are presented. The different kinds of texture and the consequences for the corresponding materials are discussed. Moreover, thermal, magnetic, and/or mechanical training concepts are presented and their working principle is explained. Several possibilities of evaluating the MFIS capability of the resulting samples are displayed. Finally methods of increasing the strain further are discussed.

引用

页码：636 / 652

页数：17

共 48 条

[21] Torsional creep of polycrystalline NiAl [J].