Investigation of twin-twin interaction in deformed magnesium alloy

Q Sun and A Ostapovets and XY Zhang and L Tan and Q Liu, PHILOSOPHICAL MAGAZINE, 98, 741-751 (2018).

DOI: 10.1080/14786435.2017.1417648

Using transmission electron microscopy, we characterised the structures of the boundary caused by the interactions between different 1 0 1 2 twin variants that share the same 1 1 2 0 zone axis in a deformed magnesium alloy. We found that the twin- twin boundaries can adopt the habit planes that are parallel to the (0 0 0 2) basal plane or the (1 0 1 0) prismatic plane or the (1 0 1 2) twinning plane of the interacting twins. To investigate the formation mechanism of various twin- twin boundaries, we also performed atomic simulations. The results indicate that the formation of a twin- twin boundary may be related to the reaction of twinning disconnections that glide on the basal- prismatic planes of the interacting twins.

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