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Proceedings Paper

Magnetic forces controlling magnetic shape memory in Ni-Mn-Ga and their practical measurement from the mechanical testing experiments in constant magnetic fields
Author(s): Alexander A. Likhachev; Alexei Sozinov; Kari Ullakko
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Paper Abstract

Performing mechanical testing experiments in all the different martensitic phases of Ni-Mn-Ga under the constant magnetic field applied perpendicular to the load direction we show that such a magnetic field can dramatically modify standard zero field strain stress relationships of MSMA's like Ni-Mn-Ga. In a particular case of 5M and 7M martensites we observe a so-called pseudo-elastic or rubber-like behavior during the standard compression-decompression cycling under the field at about 1T. This effect is finally discussed from the point of the general thermodynamic background and some particular modeling concepts.

Paper Details

Date Published: 21 July 2004
PDF: 9 pages
Proc. SPIE 5387, Smart Structures and Materials 2004: Active Materials: Behavior and Mechanics, (21 July 2004); doi: 10.1117/12.539766
Show Author Affiliations
Alexander A. Likhachev, Helsinki Univ. of Technology (Finland)
Alexei Sozinov, Helsinki Univ. of Technology (Finland)
Kari Ullakko, Helsinki Univ. of Technology (Finland)


Published in SPIE Proceedings Vol. 5387:
Smart Structures and Materials 2004: Active Materials: Behavior and Mechanics
Dimitris C. Lagoudas, Editor(s)

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