Physically based modeling of the mechanical behavior of TRIP steels

Abstract

Multiphase TRIP steels offer excellent mechanical properties that result from the composite behaviour of the different phases and the transformation of the austenite phase to martensite. For the development of a physically based micromechanical model, it is of considerable importance to evaluate the contribution of the different phases separately. For this purpose, the different constituent phases were prepared separately, and the stress-strain relationships of the different single phases were simulated taking into account their physical and microstructural properties such as the chemical composition and dislocation density. The static stress-strain properties of multiphase steels were modelled by the successive application of a mixture law. The model also allowed to integrate the strain rate and temperature dependence.