Synchrotron x-ray diffraction and crystal plasticity modeling study of martensitic transformation, texture development, and stress partitioning in deep-drawn TRIP steels

The micromechanics of the formability a lean duplex TRIP steel was investigated using Synchrotron X-Ray Diffraction (S-XRD) measurements and Crystal Plasticity Finite Element Modeling (CPFEM). Specifically, effect ferrite phase on reduction stress concentrations in martensite influence austenite texture distribution deep-drawn were studied comparison to case. A series deep-drawing processes carried out examine sheet at ambient temperature, followed by S-XRD evaluations fraction, texture, residual-stress distributions cups. macroscopic residual its partitioning among constituent phases both CPFEM. In steel, large tensile hoop stresses concentrated strain-induced α’ phase, correlating well with cracking phenomenon observed. Furthermore, initial influenced transformation kinetics during process, resulting heterogeneous fractions around circumference cups, which, turn, caused an orientation-dependent behavior. significantly reduced due favorable load better formability.