Effect of plane strain on microstructures and texture, through the reduction ratio of AZ31 Mg alloy

Structural evolution of warm-rolled AZ31 alloy sheets was investigated with respect to various reduction ratios. In order to examine the effect of rolling pass on deformation of the sheet, one-pass rolling was applied to the AZ31 alloys for various 6/1/2011reduction ratios. When the applied reduction ratio was ∼85% of the initial thickness, significant grain refinement and texture development were achieved with dynamic recrystallization. Moreover, with the increase of the rolling reduction ratio from 30% to 85%, the warm rolled sheets exhibit plane strain mode displaying uniform 〈0 0 0 1〉//ND basal textures throughout the whole sheet thickness. The two-dimensional finite element method simulation showed that the current lubrication rolling results in a uniform plane strain deformation through the whole warm rolled sheet.

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► When the rolling reduction ratio increased, the texture of {0 0 0 1}/ND developed weakly and became much weaker with fully dynamic recrystallization when the rolling reduction ratios were 70 and 85%.
► Evolution of significant grain refinement and texture can be achieved using a simple processing method, such as large strain rolling (LSR) by one-pass rolling schedule.
► In the verification of the role of strain rate ε˙13 in the plane strain samples using the commercial FEM package DEFORM™-2D, the result of the FEM simulation calculation was similar to the experimental data.