Code Validation and Development of User Routines for Microstructural Prediction with Qform

Aim of the present work is to validate the metal forming FE code QForm and to develop user routine for the prediction of microstructure evolution in 6XXX aluminum alloys. Preliminary simulations are carried out in order to select optimal friction models and coefficients among the several formulations available in the code. Numerical results are compared to grid-based visioplasticity experiments: the comparison is performed in term of grid deformation at the billet-tools interfaces, load-stroke behavior and temperatures evolution of die and profile. The optimized friction model and coefficient are then applied in second series of simulations in order to develop the prediction of microstructure evolution. A theoretical model for the grain size and shape evolution of 6XXX aluminum alloys is finally implemented through the use of user routine and compared with experimental observations. The model is found able to properly predict the deformed state of the grains in the fibrous condition.