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The microstructures of the as-rolled magnesium alloy subjected to dynamic plastic deformation along the rolling direction have been investigated.Mostly one {1012} twin variant or a twin variant pair is activated in a grain,leading to a parallel {1012} twin lamellar structure.At the stage of twinning-dominated deformation(ε<~8%),lamellar thickness decreases significantly with strain,from 5.55 to 2.49μm.The evolution of lamellar thickness during deformation is directly related to {1012} twin activity.When plastic strain is greater than ~8%,the twin lamellar structure disappears because the volume fraction of twins almost saturates at a value of ~90%.
The microstructures of the as-rolled magnesium alloy subjected to dynamic plastic deformation along the rolling direction have been investigated. Mostly one {1012} twin variant or a twin variant pair is activated in a grain, leading to a parallel {1012} twin lamellar structure .At the stage of twinning-dominated deformation (ε <~ 8%), lamellar thickness decreases significantly with strain, from 5.55 to 2.49 μm. Evolution of lamellar thickness during deformation is directly related to {1012} twin activity. Plastic plastic strain is greater than ~ 8%, the twin lamellar structure disappears because the volume fraction of twins almost saturates at a value of ~ 90%.