Twinning Behaviour of Textured Polycrystalline Ni-Mn-Ga Alloy after Hot Extrusion

Robert Chulist; Andrea Böhm; Thomas Lippmann; Werner Skrotzki; Welf Guntram Drossel; Reimund Neugebauer

doi:10.4028/www.scientific.net/MSF.635.195

Paper Titles

Recent Progress in FSMA Microactuator Developments
p.145

Structural and Magnetic Properties of Epitaxial Ni₂MnGa Thin Films
p.155

Magnetically Anisotropic Ni₂MnGa Thin Films: Coating Glass and Si Micro-Cantilevers Substrates
p.161

Fabrication and Magnetic Properties of CoNiAl Ferromagnetic Shape Memory Alloy Thin Films
p.167

Thermodynamic Modelling of Ferromagnetic Shape Memory Actuators
p.175

Simulation of an Improved Microactuator with Discrete MSM Elements
p.181

Extruded Rods with <001> Axial Texture of Polycrystalline Ni-Mn-Ga Alloys
p.189

Twinning Behaviour of Textured Polycrystalline Ni-Mn-Ga Alloy after Hot Extrusion
p.195

Nano-Positioning with Ferromagnetic Shape Memory Alloy Actuators
p.201

HomeMaterials Science ForumMaterials Science Forum Vol. 635Twinning Behaviour of Textured Polycrystalline...

Twinning Behaviour of Textured Polycrystalline Ni-Mn-Ga Alloy after Hot Extrusion

Abstract:

Up to now most of the research on Ni-Mn-Ga alloys was concentrated on single crystals. However, there is a great interest in polycrystals for technical applications. Recently, polycrystalline Ni50Mn29Ga21 rods of 25 mm diameter and 400 mm length were prepared by hot extrusion. The <100> <110> double fibre texture of the extruded rods was measured with high-energy synchrotron radiation. The microstructure after hot extrusion was analyzed with electron backscatter diffraction. Within the recrystallized grains all three martensitic variants have developed during cooling. Variants with twin boundaries preferentially aligned along the extrusion direction predominate.

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Periodical:

Materials Science Forum (Volume 635)

Pages:

195-199

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.635.195

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Online since:

December 2009

Authors:

Robert Chulist, Andrea Böhm, Thomas Lippmann, Werner Skrotzki, Welf Guntram Drossel, Reimund Neugebauer

Keywords:

Twinning, Extrusion, Magnetic Shape Memory Alloy (MSMA), Ni-Mn-Ga

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