抄録
The deformation mechanism of the extruded AZ31 magnesium alloy rod under various temperature conditions was studied. The purpose of this study is to find the yield mechanism of this material in the thermoplastic deformation conditions. When this material is subjected to tensile stress parallel to the extruded direction to which a transgranular deformation and grain boundary sliding are hard to occur by the crystallographic texture, the non basal slip whose critical resolved shear stress decreases with increasing temperature can act as the yield mechanism. After the yield was induced by the non basal slip, two different deformation mechanisms occur according to the environmental temperatures. The c-axis compression twinning which has the temperature dependency occurs at a relatively low temperature. On the other hand, the grain boundary sliding which was promoted by the dynamic recrystallization acts as the plastic deformation mechanism at the higher temperature.
