Effect of Texture on Micro-mechanism of AZ31 Magnesium Alloy during Compression

The hot-rolled AZ31 Mg alloy sheet was chosen as the studied project, and the effect of texture on slip and twin activations of Mg alloy samples during compression at room temperature was studied by electron backscatter diffraction technique (EBSD). The samples, machined from the rolled Mg alloy sheet, were compressed with the compression axes tilted 0 degrees, 30 degrees, 60 degrees and 90 degrees from the sheet normal direction. Results show that a high yield stress, without a distinct yield platform, is observed for the 0 degrees samples. The critical resolved shear stress (CRSS) of extension twin is higher than that of basal slip. The number of {10 (1) over bar2} extension twin is increased gradually with the increase of the angle. The plastic deformation of the 0 degrees samples are mainly performed by slips due to inactive tension twin, and low-angle boundaries increase obviously. There are more low-angle boundaries in the 60 degrees samples than in the 30 degrees samples because of the activation of prismatic slip.