| Issue |
J. Phys. IV France
Volume 112, October 2003
|
|
|---|---|---|
| Page(s) | 939 - 942 | |
| DOI | https://doi.org/10.1051/jp4:20031035 | |
J. Phys. IV France 112 (2003) 939
DOI: 10.1051/jp4:20031035
Stress-strain - Temperature behaviour for martensitic transformation in Ni-Mn-Ga single crystal compressed along <001 > and <110 > axes
J. Pons1, V.A. Chernenko2, E. Cesari1 and V.A. L'vov31 Departament de Fisica, Universitat de les Illes Balears, 07071 Palma de Mallorca, Spain
2 Institute of Magnetism, Vemadsky Str. 36-b, 03142 Kiev, Ukraine
3 Taras Shevchenko University, 03127 Kiev, Ukraine
Abstract
The strain recovery upon heating pre-deformed martensite as well as the stress-strain behaviour in compression of parent phase
of single crystalline Ni
49.4Mn
27.7Ga
22.9 alloy transforming martensitically at
TM = 274 K has been studied as a function of temperature and different orientation of compression axes. The constructed critical stress
to induce the martensite transformation vs temperature (
) phase diagrams can be represented by straight lines with slopes of
-2.5 and
-9.4 MPa/K in
<001
> and
<110
> directions, respectively, which are in a good agreement with the theoretically estimated values.
© EDP Sciences 2003