CONSIDERING STRESS-PHASE TRANSFORMATION INTERACTIONS IN THE CALCULATION OF HEAT-TREATMENT RESIDUAL-STRESSES

The models for describing stress-phase transformation interactions (tr ansformation plasticity and the effect of stress on transformation kin etics) are reviewed. It is shown that the macroscopic constitutive law that is generally used in the calculation of heat treatment residual stresses in steels allows to describe well the thermomechanical behavi our of the material in its transformation range. An analysis of the ro le of these interactions on the stress/strain evolutions during the he at treatment of a piece and on the residual stress states is proposed based on numerical simulations.