Nucleation Mechanism for Shuffling Dominated Twinning in Magnesium

Kim, S., El Kadiri, H., & Horstemeyer, M. (2011). Nucleation Mechanism for Shuffling Dominated Twinning in Magnesium. Proceedings of the 2011 TMS Annual Meeting & Exhibition. San Diego, CA.

We observed for the first time spontaneous nucleation of {10-12} twinning under tensile loading in magnesium crystal using atomistic molecular dynamic simulation. The system is a rectangular rod and rod axis is normal to basal plane of Mg crystal. The tensile deformation in c-axis nucleates {10-12} twinning starting at the corner of square of cross section of the rod. The twin boundary is spherical at the beginning and become a linear boundary in {10-12} planes as time goes by. The twinning and shuffling processes are described. The nucleation mechanism of the shuffling dominated twinning is explained.