静液压力下7075铝合金圆环压缩试验研究

在不同静液压力下对不同形状因子的圆环试件进行轴向压缩试验,得出了7075铝合金圆环压缩时静液压力对极限相对压缩量的影响规律.并进行了试件子午面剖分观察,利用流线变形分析了试件在不同静液压力条件下超过极限压缩量时的变形和断裂特征.实验结果表明,在测试的压力范围内,随着静液压力的增加,圆环的极限相对压缩量呈线性增大,从而证明施加静液压力能够显著提高7075铝合金的塑性变形能力.

Experimental research on compressing 7075 Al alloy ring under hydrostatic pressure

Through axial compression experiments of rings with variant shape factors and different hydrostatic pressures,the effect of hydrostatic pressure on the compression limit of an aluminum alloy 7050 ring was obtained.With observation of meridional sections of deformed samples,the deformation and fracture feature when the compression limit is exceeded under different hydrostatic pressures is analyzed.The experimental results show that the compression limit of an Al alloy ring increases as the hydrostatic pressure increases,and the increase displays linearity in a certain pressure range.The research verified that the formability of the aluminum alloy 7075 ring in the compression process was remarkably improved by employing hydrostatic pressure.