Advanced Statistical Crystal Plasticity Model: Description of Copper Grain Structure Refinement during Equal Channel Angular Pressing

The grain structure of metals changes significantly during severe plastic deformation (SPD), and refinement is the main process associated with SPD at low homologous temperatures. Products made ultrafine-grained materials exhibit improved performance characteristics are considerable industrial interest, which generates a need for creation comprehensive models. This paper considers integration ETMB (Y. Estrin, L.S. Toth, A. Molinari, Y. Brechet) model, describes evolution an average cell size into two-level statistical crystal plasticity constitutive model (CM) FCC polycrystals. original relations some its modifications known from literature were analyzed to obtain accurate, physically admissible description process. substructure determined framework advanced taken account in CM hardening formula. By applying integrated numerical experiments performed simulate copper equal channel angular pressing (ECAP) room temperature. results obtained good agreement experimental data. ideas about further development proposed outlined.