A plate of hot extruded AZ31 alloy with some large grains was selected for impact tests. The occurrence of twinning was investigated. It was found that when impacted along the normal direction of the plate, {10•1}–{10•2} double twinning was commonly observed in large grains, and {10•2} tension twinning could also be activated although their c-axis was close to the compression direction. In small grains, {10•2} tension twins were favoured in which case the extension strain component was parallel to the c-axis. In addition, twins with <11•0> 75° misorientation to the parent matrix were also observed.

Twinning Characteristics in Textured AZ31 Alloy under Impact Loading Along Specified Direction. B.L.Wu, G.Wan, Y.D.Zhang, C.Esling: Materials Letters, 2010, 64[5], 636-9