Unexpected partial dislocations within stacking faults in a cold deformed Mg−Bi alloy

Stacking faults and the partial dislocations associated with them in a cold-rolled Mg–3wt%Bi alloy have been systematically characterized using transmission electron microscopy and high-angle annular dark-field scanning transmission electron microscopy. Intrinsic stacking faults I2 and I1 are both detected. The I2 fault results from dissociation of a basal 〈a〉 dislocation into two Shockley partial dislocations and exists in both matrix and...