| Numéro |
J. Phys. IV France
Volume 112, October 2003
|
|
|---|---|---|
| Page(s) | 1009 - 1012 | |
| DOI | https://doi.org/10.1051/jp4:20031052 | |
J. Phys. IV France 112 (2003) 1009
DOI: 10.1051/jp4:20031052
Time-dependent dynamic response of martensite in Ni-Mn-Ga magnetic shape memory alloys to stress caused by constant magnetic field
N. Glavatska1, I. Glavatsky1, Y. Ge2 and V.K. Lindroos21 Institute for Metal Physics, Vemadsky Blvd. 36, 03680 Kiev 142, Ukraine
2 Helsinki University of Technology, Laboratory of Physical Metallurgy and Materials Science, P.O. Box 6200, 02015 Hut, Finland
Abstract
This work presents the original experimental results concerning study of new phenomenon -
time-dependent behaviour under a constant magnetic field and some effects recently found concerning the kinetics of stress
relaxation in Ni-Mn-Ga alloys. Three non-stoichiometric Ni-Mn-Ga alloys, producing large magnetic shape memory effect (MSME)
up to 5% at room temperature, were investigated. It was found from the time dependence of the magnetic field induced strain
at constant magnetic field and set temperature that the material gradually deforms under constant magnetic field in a manner
analogous to mechanical creep under constant applied compressive stress.
© EDP Sciences 2003