Influence of prior loading on creep deformation using crystal plasticity

This paper evaluates the influence of pre-strain on creep deformation in austenitic stainless steel using a crystal plasticity model. A creep deformation methodology which mimics the effect of climb dislocation climb is implemented within a crystal plasticity framework and used to investigate creep deformation. The results showed that creep strain increased with increasing climb rate for the same stress level. Second, an increase in creep strain is observed by increasing the peak stress for a fixed dislocation climb rate. Finally, increasing the prestrain led to pinned dislocations thereby promoting creep resistivity.