Twin-like domains and fracture in deformed magnesium

 Twin-like domains were observed in deformed magnesium by using electron backscatter diffraction. These domains do not satisfy any of the known twin orientation relationships, but have a high misorientation angle of ∼57° and a rotation axis of 〈101¯0〉. Fracture occurred primarily in these domains. {101¯2}〈101¯1¯〉 twins were observed at the domain/matrix interfaces, and these twins may relax local stress and retard crack propagation. Trace analysis shows that the domains are likely on {101¯1} planes. Interaction between the domains may lead to crack nucleation.