Abstract
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 〈 1 0 1 ¯ 0 〉 . Fracture occurred primarily in these domains. { 1 0 1 ¯ 2 } 〈 1 0 1 ¯ 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 { 1 0 1 ¯ 1 } planes. Interaction between the domains may lead to crack nucleation.
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