Strain simulation of steel during a heating-cooling cycle including solid-solid phase change

International audienceDesigned for the simulation of transformation induced plasticity in steels occurring on cooling, the model first proposed by Leblond in the middle of 80's works well for constant uni-axial stress test. But further experimental investigation have shown that for non-proportional multi-axial test, the quality of the model is worse. The purpose of this paper is to improve this model through the removal of the hypothesis that plastic flow for the Greenwood–Johnson mechanism occurs only in the ‘weaker’ phase. The improvement, leading to better agreement, enables to use the model on cooling, and shows that for TRIP plastic flowing in harder phase is almost important, even if it is lower than in the ‘weak’ phase