To investigate the effect of die temperature on formability of AZ31B magnesium alloy sheet in stamping, forming limit curve (FLC) of AZ31B magnesium alloy sheet was obtained through Nakazima semispherical drawing under different die temperatures. Thermo-mechanical coupling effect under heat transfer between AZ31B magnesium alloy sheet and die was analyzed based on temperature fields of biaxial tension specimens obtained by thermo-mechanical coupled simulation using finite element method. Effect of die temperature on forming limit of AZ31B alloy sheet in working condition was finally verified in a tryout stamping of hinge cover. The results show that temperature gradient distribution of AZ31B magnesium alloy is highly changed with the decline of die temperature, forming limit is thus decreased and fracture position is also affected. The FLCs under different die temperatures are proved to be in good agreement with actual stamping of AZ31B alloy sheet.
WANG Zimin,LIU Qi,GU Ruiying,WANG Wurong,WEI Xicheng
. Formability of AZ31B Magnesium Alloy Sheet Under
Different Die Temperatures[J]. Journal of Shanghai Jiaotong University, 2018
, 52(9)
: 1092
-1097
.
DOI: 10.16183/j.cnki.jsjtu.2018.09.013
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