TITLE

Analysis of Variant Orientation Before and After Compression in Polycrystalline Ni50Mn29Ga21 MSMA

AUTHOR(S)
Hürrich, C.; Wendrock, H.; Pötschke, M.; Gaitzsch, U.; Roth, S.; Rellinghaus, B.; Schultz, L.
PUB. DATE
October 2009
SOURCE
Journal of Materials Engineering & Performance;Oct2009, Vol. 18 Issue 5/6, p554
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
This paper deals with the microstructure and plastic deformation of Ni50Mn29Ga21 ferromagnetic shape memory alloys. In contrast to conventional shape memory alloys, plastic deformation in the martensitic phase, which is due to twin boundary motion, may be caused not only by mechanical stress but also by an external magnetic field. The polycrystalline sample was prepared by directional solidification with a texture parallel to the heat flow. Afterwards, a heat treatment follows for chemical homogenization and stress relaxation in the austenitic state. The configuration of the twin boundaries was analyzed before and after compressing the samples. The microstructure after compression was related to the magnetic properties.
ACCESSION #
43029880

 

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