Stress and Strain Behaviors of Mg Alloy AZ31 in Plane Strain Compression

Most of magnesium alloy products are manufactured by die casting or thixo-molding processes. However, there is extremely little use of the products by metal forming due to high resisting plastic deformation in normal temperature and their expensive cost. In this study, to make clear the plastic deformability, stress and strain behaviors of Mg alloy AZ31 hot rolled sheet in plane strain compression in the temperature from 20 ◦ C to 250 ◦ C have been discussed. Tension test and plane strain compression test have been performed to obtain the equivalent stress and equivalent plastic strain relations. The plane strain compression tests with some lubricants have been performed, and the e ff ect of friction between die and deforming material on plastic deformation behaviors has been investigated by the elastic-plastic finite element analysis. Optical microstructures of deformed materials are also observed.