Abstract
Specific gravity of magnesium alloy is the lightest among practical use metals. Magnesium alloy has many strong physical properties. However, plastic forming is difficult in normal temperature, due to the crystal structure is hexagonal close packed lattice. Most of the magnesium alloy products are produced by casting and thixomolding, and there is extremely little use of plastically deformed material. In this study, the stress-strain behavior of the Magnesium alloy AZ31 sheets was investigated in cold and warm temperatures. The materials are used hot-rolled and hot-extruded ones, to compare the stress-strain behaviors in tension and plane strain compression tests.