The effect of texture and strain conditions on formability of cross-roll rolled AZ31 alloy

The effect of texture evolution of AZ31 Mg sheet on cross-roll rolling process has been investigated for the commercial AZ31 Mg sheet. The large ɛ23 was operated for the cross-roll rolled sample throughout the whole thickness, leading to the homogeneity of the (0 0 0 2) basal texture. After recrystallization annealing at 673 K for 30 min, cross-roll rolled sample showed uniform texture intensity from surface layer to middle layer different from the normal-roll rolled sample. An excellent formability of the cross-rolled specimen was achieved due to the developed homogeneity of the texture and microstructure refinement for the cross-roll rolled specimen. The strain conditions of surface and center layers were discussed in terms of experimental evaluations and three-dimensional finite element method (FEM) for conventional rolling and cross-roll rolling.

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► Cross-roll rolling of magnesium alloy sheets was carried out in which the roll axes are tilted by ±7.5° away from the transverse direction.
► The large ɛ23 during cross-roll rolling throughout the whole thickness of the sheet was operated for the cross-roll rolled sample, leading to the homogeneity of the (0 0 0 2) basal texture.
► An excellent formability of the cross-rolled specimen was achieved due to the developed homogeneity of the texture for the cross-roll rolled specimen.