Modelling of TWIP effect on work-hardening

Austenitic steels can exhibit both high strength and ductility due to a particularly high work hardening rate. Among all the possible deformation modes for austenitic steels, Twinning Induced Plasticity (TWIP) has the most beneficial effect on the work-hardening. It is believed that deformation twins increase the work-hardening rate by acting as obstacles for gliding dislocations. Many studies have investigated this point experimentally using microscopy. On a physical basis, the purpose of this study is to develop a work-hardening model taking into account the interaction between twinning and dislocation gliding. The results from the model are in good agreement with the tensile test results.