ZK60镁合金板材成形性能试验

Research on the formability of ZK60 magnesium alloy sheet

对ZK60镁合金板材在室温和高温条件下进行杯突试验。试验结果表明,室温下ZK60镁合金板材杯突值IE=4.5mm,在370℃条件下材料的杯突值IE=16.5mm,胀形高度增加了266.7%;ZK60镁合金板材高温胀形的破裂,是由冲头附近板材沿切向方向的裂纹扩展和沿厚度方向缩颈所产生的断裂造成。

ZK60 magnesium alloy possesses highest strength/weight ratio in all metal materials.Cupping testing method was carried out for ZK60 magnesium alloy sheet at elevated and room temperature.The test results show that the high temperature bulging rupture of ZK60 magnesium alloy sheet is due to the crack propagation of the sheet near the punch along the tangential direction and the necking along the thickness direction.At room temperature,the IE value of cupping test is about 4.5mm.At elevated temperature,the IE value of the cupping test increases to 16.5mm and the bulging height increases by 266.7% comparing with that of room temperature.It illustrates that the increase of temperature will improve the formability of ZK60 magnesium alloy sheet which displays poor expanding and flanging formability at room temperature.