J. Phys. IV France
Volume 112, October 2003
Page(s) 175 - 178

J. Phys. IV France
112 (2003) 175
DOI: 10.1051/jp4:2003859

Influence of the microstructure on the SMA behavior

C. Niclaeys, T. Ben Zineb and E. Patoor

LPMM, ENSAM de Metz, 4 rue Augustin Fresnel, 57078 Metz cedex 3, France

In this paper, influence of the microstructural description in micromechanical modeling will be discussed. A new formulation taking into account a microstructure composed of clusters of martensitic plates having different cristallographical orientations is proposed. Using this approach, a complete interaction matrix is derived for NiTi SMAs. This new matrix is composed of all the self-accommodating groups experimentaly observed in this alloys. This cluster scheme is also applied to model the anisothermal creep of SMA single crystal under low stress regime.

© EDP Sciences 2003