Pneumatic Bulging of Magnesium AZ 31 Sheet Metals at Elevated Temperatures

This paper deals with forming magnesium sheet metal components like auto body parts by pneumatic bulging. Furthermore, this paper deals with the evaluation of true stress-true strain curves as well as with forming limit curves determined by pneumatic bulging at temperatures up to 350°C. It can be shown that magnesium AZ31 is quite good formable at temperatures in the range of 250°C to 350°C. ng from these fundamental investigations, an auto body sheet metal component was formed by pneumatic bulging at a temperature of about 300°C. rmore, the strains over the component were measured with an automated grid analysis. This analysis shows a nearly equal distribution of the strains over the component.