Modelling of phase transformations and transformation plasticity of a continuous casted steel 20MnCr5 incorporating segregations

In general, material data for heat treatment simulations are assumed to be isotropic and homogeneous (except the carbon dependency for case hardening simulations). But it was found for the conventional continuous casted case hardening steel 20MnCr5 (SAE 5120) that segregations lead to anisotropic and inhomogeneous properties especially during phase transformations. This paper reviews the work within the Collaborative Research Centre SFB 570 Distortion Engineering on determination of segregations and its influence on phase transformations and plasticity as well as the subsequent modelling and simulation.