高应变率下阻尼铝合金的动态力学性能研究  

The Dynamic Mechanical Properties of Damping Aluminum Alloys Under High Strain Rate

作　　者：姚俊臣[1] 文丽芳[1] 韩寿波[1] 马岳[1] 

机构地区：[1]北京航空航天大学材料科学与工程学院,北京100083

出　　处：《材料工程》2006年第6期46-48,67,共4页Journal of Materials Engineering

摘　　要：针对航空用高阻尼铝合金在高应变率载荷下的服役特征,研究了两种高阻尼铝合金在高应变率下的动态力学性能。采用分离式霍布金森(Hopkinson)压杆对高阻尼铝合金进行了动态压缩实验,获得了应变率(140,275,500s-1)对材料应力-应变曲线的影响规律,并同普通铸造铝合金ZL101A的动态压缩力学性能进行比较分析。结果表明:高阻尼铝合金在高应变率下的力学性能明显优于普通铸造铝合金;第一种高性能阻尼铝合金的动态压缩力学性能优异。第二种高性能阻尼铝合金随着应变率的提高,材料的弹性模量和应力均有所下降,但是形变强化效果显著。The dynamic mechanical properties of two kind of high damping materials were studied under high strain rate. Separated Hopkinson pressure bar was used to perform the compressive test. Stress and strain curves were obtained at three different strain rates, 140,275 and 500s^-1. The corresponding results derived were compared with those of cast aluminum ZL101A alloy. It is shown that the dynamic mechanical properties of the two kinds of high damping materials are much better than that of ZL101A alloy. FMS0714/y （Zn-30Al） alloy exhibited the excellent dynamic mechanical property. With increasing strain rate, the elastic modulus and stress of X7093/y（Zn-30Al）alloy somewhat decreased.

关 键 词：阻尼 铝合金 高应变率 动态力学性能 

分 类 号：TG146.21[一般工业技术—材料科学与工程]