Crystal plasticity modeling and simulation considering the behavior of the dislocation source of ultrafine-grained metal

Aoyagi, Yoshiteru*; Tsuru, Tomohito   ; Shimokawa, Tomotsugu*

UFGMs with a grain size less than 1 m exhibits remarkable material and mechanical properties, and a computational model predicting these properties is desired in the field of materials science and engineering. When grains are of the submicron order, dislocation loops are hardly generated from Frank-Read sources smaller than the grain size. In this study, we develop a crystal plasticity model considering the effect of the grain boundary and dislocation source. We thoroughly investigate the effect of dislocation behavior on the material properties of UFGMs.