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Polycrystalline Ni-Mn-Ga as a potential material for magnetically driven actuators

 
: Pötschke, M.; Roth, S.; Gaitzsch, U.; Hürrich, C.; Böhm, A.; Schultz, L.

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Preprint urn:nbn:de:0011-n-1747555 (1.7 MByte PDF)
MD5 Fingerprint: b72d1d0997206250485f1da6a881a905
Created on: 2.8.2011


Chernenko, V.A.:
Advances in Magnetic Shape Memory Materials : Special topic volume with invited peer reviewed papers only
Stafa-Zuerich: Trans Tech Publications, 2011 (Materials Science Forum 684)
ISSN: 0255-5476
pp.129-137
English
Book Article, Electronic Publication
Fraunhofer IWU ()
Ni-Mn-Ga; polycrystal; training; texture; magnetic-field-induced strain; MFIS

Abstract
Textured polycrystalline Ni-Mn-Ga alloys were prepared by directional solidification. Alloys were chosen to have the 5M modulated martensitic structure after proper heat treatment. A two-side mechanical training decreased the twin boundary pinning stress. The stress-strain behaviour for the training process and the magnetically induced stress depends on the training direction. Magnetic field induced strain was demonstrated in samples with a plate-like geometry. The influence of the microstructure on the magneto-mechanical behaviour is discussed.

: http://publica.fraunhofer.de/documents/N-174755.html