Numerical simulation and experimental study of warm deep drawing of AZ31 magnesium alloy sheet

The uniaxial tensile test was conducted by using Gleeble 3500 thermal-mechanical simulator,and the mechanical property of AZ31 magnesium alloy sheet was analyzed.The test results were then employed in the numerical simulation of warm drawing process,and the influences of process parameters such as drawing temperature,blank holder force were investigated.In order to validate the simulation results,the limiting drawing ratio tests were also performed.The results show that,under the technique condition of limit forming temperature of 150℃ and limit drawing velocity of 15mm/s,the limiting drawing ratio can reach 2.5.The simulation results show that,simulation results are consistent with the experimental results.Using variable blank holder force can remarkably improve the forming performance,and the limiting drawing ratio would reach 5.0.