AZ31镁合金动态力学行为实验研究

Investigation on Dynamic Mechanical Behavior about AZ31 Magnesium Alloy

为研究镁合金的动态力学行为,对AZ31镁合金进行霍普金森压杆(Hopkinson)冲击实验,探讨冲击载荷下AZ31镁合金力学响应及相关规律,结果表明:AZ31镁合金在冲击载荷下有明显的屈服和应变强化现象,合金的最大应力值随着冲击速度不断增加,而动态屈服强度对应变率变化不敏感。此外随应变率的增加,该合金变形能力有一极值。

In order to study the dynamic mechanical behavior of magnesium alloy, the Hopkinson impact experiment was carried on the AZ31 alloy, the mechanics response and the correlation rule have been discussed at impact load, the result indicated： yield and strain strengthening was present under the impact load for AZ31 alloy, the maximum stress increases with the impact speed, but the dynamic yield strength is insensitive to the strain rate. In addition, the distortion ability of AZ31 alloy has an extreme value with the strain rate increasing.