J. Phys. IV France 115 (2004) 29
Experimental determination of initial surface of phase transformation of SMAC. Bouvet1, S. Calloch2, K. Taillard2 and C. Lexcellent1
1 Laboratoire de Mécanique Appliquée R. Chaléat, Université de Franche-Comté, 24 chemin de l' Épitaphe, 25000 Besançon, France
2 LMT-Cachan, École Normale Supérieure de Cachan, 61 avenue du Président Wilson, 94235 Cachan Cedex, France
This paper is concerned with the mechanical behavior of Shape Memory Alloys (SMA). A particular attention is paid to the behavior under multi-axial proportional and non-proportional loadings. A large experimental data-base, composed of tension-torsion tests, tension-internal pressure tests and bi-axial compressive tests is presented and reported. For each type of multi-axial tests, an emphasis is placed on the determination of the shape of the transformation outset surface and the transformation strain rate is determined for selected loading path. Finally, a generalized J 2-J 3 criterion of transformation outset, based on experimental observations, is proposed and identified.
© EDP Sciences 2004