Abstract
To improve the plastic formability of AZ31Mg alloys, this study examined the relation between mechanical properties such as plastic workability and changes of structural refinement after the multi-axial alternative warm forging (MAF) and roll working with recrystallization heat treatment or high-temperature heat treatment. In MAF, work pieces were rotated through 90° on the longitudinal axis between each forging press. This procedure was successful to be introduced large strain into materials. Rolling condition was total redaction 50%, temperature 493K, and water quench. The plastic formability assessment was carried out by conical cup test at testing speed 10mm/min under temperature (293-523K). It was found that at test temperature 423K, AZ31Mg formability was more than those of A5083 at all process. Especially, AZ31Mg alloys with high-temperature heat treatment had good conical cup values at room temperature to close to those of A5083.
