Superplastic Forming Limit and Instability of AZ31B Sheet
The superplastic bulging test of AZ31B magnesium alloy sheet of 0.6mm thick was carried out on Alliance RT/50 tensile machine at 573K and 3.3×10-4S-1. It is found that either in tensile-compressive deformation or in bi-axis tensile deformation, the judgment criterion for local necking of superplastic deformation is dε2=0. The superplastic forming limit diagram(FLD) at 573K and 3.3×10-4S-1 was established for the first time.
Yafang Han, Fusheng Pan, Jianmao Tang, Chungen Zhou
M. J. Song et al., "Superplastic Forming Limit and Instability of AZ31B Sheet", Materials Science Forum, Vol. 686, pp. 343-347, 2011