AZ31 sheet

초록

Press forming of magnesium alloy sheet is conducted at elevated temperatures to improve the press formability because of low formability at room temperature. At elevated temperatures, magnesium alloy sheet formability is known to be very sensitive to the strain rate. In this paper, warm deep drawing tests of magnesium alloy AZ31 sheet was conducted under multi-stage velocity profile as well as single-stage velocity profile to examine the formability change by drawing velocity profile. The observed formability improvement by multi-stage velocity profile was analyzed by using the finite element analysis.