Cavitation behavior in superplastic 5083 Al alloy during multiaxial gas blow forming with lubrication |
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| Authors: | Pin-hou Sun Horng-yu Wu Wei-song Lee Shyh-hung Shis Jau-yuean Perng Shyong Lee |
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| Affiliation: | 1. Department of Mechanical and Mechatronics Engineering, University of Waterloo, 200 University Ave. West, Waterloo, ON N2L 3G1, Canada;2. Formerly Novelis Research and Technology Centre, 945 Princess Street, Kingston, ON K7L 5L9, Canada |
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| Abstract: | Despite its importance for industrial applications, the effect of lubrication on the cavitation behavior of superplastic materials has been given little attention. In this paper, a series of experiments were performed regarding bulging superplastic 5083 Al alloy sheet into dies with a cylindrical (cup) and rectangular (pan) die cavity for forming with and without lubrication, the formed parts were then evaluated to determine the effect of lubrication on the cavitation level evolution, thickness distribution, and void distribution. It was found that void shrinkage took place in the overlaid region for both forming with and without lubrication. The maximum void volume fraction could be effectively reduced for forming with lubrication; however, reductions in the maximum void volume fractions for cup forming were less significant than those for pan forming. |
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