Two types of basal stacking faults within {101¯2} twin in deformed magnesium alloy

Deformation twinning is one of the most important strain accommodation mechanisms for deformed hexagonal materials. The stacking faults inside the twin may act as obstacles to hinder the subsequent motion of the dislocations and accordingly influence the mechanical properties of materials. In the present work, two types of basal stacking faults within the {101¯2} deformation twin in a deformed magnesium alloy have been studied by high-resolution transmission electron microscopy. It has found that one ends of the basal stacking faults are usually bounded by the incoherent twinning boundaries. According to this experimental feature, the possible formation mechanisms of such basal stacking faults will be discussed.