Effects of process parameters on electromagnetic forming of AZ31 magnesium alloy sheets at room temperature
Effects of process parameters on electromagnetic forming of AZ31 magnesium alloy sheets at room temperature
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DOI：
10.1007/s00170-012-4442-3
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发表时间：
2012-08
期刊：
影响因子：
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通讯作者：
Junrui Xu;Haiping Yu;C. Li
中科院分区：
文献类型：
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作者：
Junrui Xu;Haiping Yu;C. Li
本文通过电磁胀形实验研究了工艺参数对AZ31镁合金板材成形的影响。鼓包高度随着放电能量的增加而增加，通过调节放电电压和电容来调节放电能量。与准静态成形相比，电磁成形的极限穹顶高度有明显提高。为了提高能量利用效率，分别采用0.5 mm和1 mm厚的铝驱动板对镁合金板材进行了加速处理。对于AZ31板的破裂，放电能量可以从最大值4.356 kJ(无驱动器)降低到2.304 kJ(使用1 mm铝驱动器片)。利用有限元软件对AZ31板材电磁成形过程进行了数值模拟。通过模拟分析了速度、应变率和塑性应变能的变化。与准静态成形极限结果相比，主应变和次主应变分别提高了约68%和72%。
In this work, the effects of process parameters on AZ31 magnesium alloy sheets were investigated by electromagnetic bulging experiments. The bulging height increases with increasing discharging energy, which is adjusted by tuning discharge voltage and capacitance. The limit dome height of electromagnetic forming is markedly improved as compared to quasi-static forming. In order to improve the efficiency of the energy, 0.5- and 1-mm thick Al driver sheet were used to accelerate the magnesium alloy sheets. For rupturing the AZ31 sheet, the discharging energy can be reduced from a maximum value of 4.356 kJ (no driver) to 2.304 kJ (with1-mm Al driver sheet). The numerical simulation for the electromagnetic forming of AZ31 sheet is performed by means of ANSYS FEA software. The change of velocity, strain rate, and plastic strain energy were analyzed by simulation. Compared with quasi-static forming limit results, increases in the major and minor principal strains of approximately 68 and 72 % were achieved, respectively.