Nucleation Mechanism for Shuffling Dominated Twinning in Magnesium

摘要

We observed nucleation of {10-12} twinning under tensileloading in magnesium rectangular rod system using atomisticmolecular dynamic simulation. The rod axis is normal to basalplane of Mg crystal. The tensile deformation in c-axis nucleates{10-12} twinning starting at the corner of square of cross sectionof the rod. The twin boundary is spherical at the beginning andbecome a linear boundary in {10-12} planes as time goes by. Thetwinning and shuffling processes are described. The nucleationmechanism of the shuffling dominated twinning is explained.