Contribution to digital representation of materials subjected to thermomechanical processing

Development of software tools, which allow connection between phenomena occurring in materials in various length scales, is presented in the paper. Multiscale CAFE approach, which combines cellular automata (CA) and finite element (FE) methods, is selected for modeling. In this approach FE method describes material behavior in the macro scale, while CA method simulates micro and mezo scale phenomena. Capability of accounting for these phenomena, which are either stochastic or discontinuous or both, is the main advantage of the cellular automata. The objective of the present work is to improve qualitative and quantitative accuracy of the model. Two phenomena are considered. Micro shear band initiation and propagation is the first and recrystallization is the second. The main emphasis is put on improvement of the transition rules, which describe the state of the material at the grain level. Beyond this, the common features of both models are distinguished to develop better numerical tool, which will allow to combine CA with the FE simulations of real processes. Finally, results of the CAFE modeling of the polycrystalline microstructure deformation and recrystallization are presented.