Co-zone {(1)over-bar012} Twin Interaction in Magnesium Single Crystal

Using in situ optical microscopy, electron backscatter diffraction analysis, and atomistic simulations, we studied co-zone {(1) over bar 012} twin interaction in magnesium single crystal under compression-tension along the [10 (1) over bar0] direction. Two co-zone twins are activated and interact with each other, resulting in two types of tilt boundaries that have habit planes (0001) and (10 (1) over bar0) and prevent twinacross- twin transmission but facilitate the propagation of a basal slip band. Upon strain reversal, the unfavorable dissociation of dislocations in the formed tilt boundaries hinder de-twinning.