Numerical analysis of residual stresses on microscale and mesoscale in hot bulk forming parts under specific cooling

Abstract

Abstract The adjustment of targeted residual stress states is important in order to improve the properties of a component. Here, especially hot forming processes offer a meaningful potential since a number of parameters such as deformation state, temperature profile or cooling media can be adapted independently. This publication presents first simulation steps for the calculation of residual stresses on microscale and mesoscale. As a first application, the microscopic phase transformation from austenite to martensite due to a cooling process is considered. The arising mesoscopic eigenstrain distributions are used in the solution of an elasto‐plastic two‐scale boundary value problem to gain resulting residual stress states.