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Post-Mechanical Properties of Superplastically-Forged Zn-22wt%Al Alloy

Recently, the superplastic damping device, which has been using Zn-22wt%Al alloys with an ultra-fine grain size, has been put into practical use for a high-rise building. For the purpose of the improvement and mass-production of a superplastic damping device, the investigation about the superplastic forming and the characterization after the forging was carried out. As the results of FVM analysis, it was verified that the high effective stress and strain occurred at the corner and in the interior of the formed samples, respectively. However, the microstructure and mechanical properties after the forging were almost equivalent to those before the forging.