J. Phys. IV France 112 (2003) 175
Influence of the microstructure on the SMA behaviorC. 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.
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