Microstructure and Mechanical Properties of AM60 Magnesium Alloy Sheet Processed by Equal Channel Angular Rolling

AM60 magnesium alloy sheets were prepared by equal channel angular rolling (ECAR),the microstructure and mechanical properties were examined.It was found that the orientation of the sheet processed by ECAR was changed and the crystal orientation evolved from (0002) basal plane orientation to non-basal plane.Compared with as-received sheet,the grain size decreased and refined twins were presented.The strength of the sheets after ECAR was enhanced obviously,the ultimate tensile strength increased from 222 to 372 MPa and the yield strength increased from 156 to 260 MPa.The elongation increased slightly.