Abstract
The considered highly alloyed TRIP-steel (TRansformation Induced Plasticity-TRIP) exhibits a phase transition from austenite to martensite during large deformation which leads to a remarkable strain hardening capability. However, the martensite evolution highly depends on temperature and stress state. Therefore, especially self heating during deformation has a great influence on the behavior of the material. A thermomechanically coupled viscoplasticity model is applied accounting for strain induced martensite formation and Lode-angle dependent strain hardening. Using fully thermomechanically coupled simulations of tensile and compression tests the model is able to capture the observed asymmetric hardening behavior of the considered CrMnNi-steel as well as the recorded crossing effect of yield curves at elevated strain rates.
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