Computational study on anisotropic plasticity caused by crystal structure and microstructure

Tsuru, Tomohito   ; Aoyagi, Yoshiteru*; Shimokawa, Tomotsugu*; Yamaguchi, Masatake   ; Itakura, Mitsuhiro  ; Kaburaki, Hideo; Kaji, Yoshiyuki  ; Chrzan, D. C.*

Magnesium alloys, one of the lightest metal alloys among metals in practical use, have great potential for next generation of structural materials. Ultrafine-grained metals have been desired to improve strength without allowing. However these materials have crucial disadvantages in practical use in that the elongation-to-failure is relatively low due to the strong anisotropy in plastic deformation of the hexagonal crystal. In this study we investigate the origin of plastic anisotropy caused by crystal structure and microstructure by computational approach.