Numerical multi-scale simulations of the mechanical behavior of β-metastable titanium alloys Ti5553 and Ti17

The purpose of this study is to investigate the deformation mechanisms in the beta-metastable titanium alloys Ti17 and Ti5553, which exhibit an important fraction of beta phase (similar to 40%). A mean field model is introduced to depict the effect of microstructure on mechanical properties. The average behavior of each phase is taken into account: the micromechanical model simulates for each phase the respective elastic anisotropy and the visco-plastic flow with kinematic and isotropic hardening. A good agreement has been obtained between numerical simulations and experiments for several microstructures. (C) 2011 Published by Elsevier Ltd. Selection and/or peer-review under responsibility of ICM11