Effects of Rolling Temperature on the Development of Microstructure, Texture, and Mechanical Properties in AZ31 Magnesium Alloy

Wrought magnesium alloys show a low formability at room temperature, and a remarkable anisotropy of mechanical properties make it difficult to use them in a deformation process in industry. The microstructure and crystallographic texture of metals are developed during thermo-mechanical processes, and they are significant to the understanding of the mechanical properties of metals. This work studies the microstructure, texture development and tensile properties of the extruded AZ31 Mg alloy after rolling at 100 and 300 degrees C. After 40% rolling at 100 degrees C, many deformed twins were observed and a relatively weak texture developed. The basal poles were split and rotated towards the rolling direction about 20 degrees. During 60% rolling at 300 degrees C, the dynamic recrystallization (DRX) took place and developed a strong < 0001 > parallel to ND fiber texture, which influenced the poor formability at room temperature.