Recrystallized Grain Size in Cold-Rolled and Annealed AZ31 Wrought Magnesium Alloys Affected by Rolling Direction

Abstract

A convenient grain refinement method has been developed in wrought magnesium alloys. Commercial hot-rolled sheet and extruded bar of AZ31 alloys were subjected to further cold rolling and subsequent annealing. The influence of the angle, , between the original working direction and the cold-rolling direction on the grain size was also investigated. The present process was found to be effective to refine the grain size. Grain refinement became more marked when increased. Yield strength and hardness were confirmed to increase with decreasing grain size.