Stress field interaction during propagation of adjacent tensile twinning nuclei in magnesium

Abstract

The shear stress field proximity to the twinning and prismatic/basal interfaces of {\( \overline{1} \)012} tensile twins is shown by molecular dynamics simulations. The stress field interacts and influences the twinning growth mode in the subsequent deformation process, which is simulated by changing the relative positions of the nuclei. An asymmetrical growth mode appears, in which the growth of one twin is predominant over the other when they are oriented at 45° to each other. This growth mode is sensitive to the simulation temperature and strain rate and can be attributed to the interaction of the stress field proximity to the prismatic/basal interfaces and twinning planes.