Constitutive modelling of the deformation‐induced martensite transformation observed in metastable austenitic CrNi steels

Metastable austenitic CrNi steels undergo phase transformation when loaded or deformed plastically. In the current work a macroscopic and phenomenological constitutive model is presented to strain induced of austenite martensite. The approach based on previous works Olsen Cohen [1] & Stringfellow et al. [2]. kinetics modelled assumption that intersections shear bands in phase, act as potential martensite nucleation locations. Evolution band density their are using plastic phase. probability intersection creating given by Gaussian cumulative distribution, which turn depends temperature stress triaxiality. resulting stress- behavior considers volume fraction, strains hardening parameters individual phases internal variables. An explicit formulation material implemented user subroutine bi-linear element FEM. Some required estimated fitting experimental stress-strain evolution curves. For purpose illustrating model's behavior, boundary value problems components with structured surfaces presented.