Integration of physically based models into FEM and application in simulation of metal forming processes

To obtain higher accuracy in FEM simulations the incorporation of microstru cture evolution models becomes more and more important. From the point of v iew of metal physics it is well known that effects like recrystallization a nd deformation texture have a big influence on the material properties, esp ecially the mechanical ones. The present article will ive an overview about pans of the research activities in the Collaborative Research Centre (SFB 370) of the Deutsche Forschungsgemeinschaft (DFG). Three different types of microstructure models have been developed at the IMM and were coupled at t he IBF to an implicit FEM code. The so-called flow-stress model is based on dislocation density evolution to describe the Row curve of metals, mainly Lit high temperatures. The Taylor-type model is able to describe deformatio n texture during metal forming. The third model is a modified cellular auto maton to predict grain size and microstructure evolution during static recr ystallization. The simulation of a rolling trial of the Al-alloy AA3104 inc luding the named three models has been made and the results will be validat ed with experimental findings.