M1600钢的动态力学性能

Dynamic mechanical properties of M1600 steel

利用分离式Hopkinson杆对一种新型高强度马氏体M1600钢进行了动态拉伸力学性能测试,对M1600钢的应变速率敏感性、动态断裂方式及吸能特点进行了研究,研究结果表明:M1600钢具有一定的应变速率敏感性,且应变速率敏感性随应变速率的增加而逐渐增强。M1600钢的断裂机理会随应变速率的增加发生变化,并影响M1600钢的塑性。当应变速率为3000s^-1时,M1600钢的伸长率最高,为20.5%。在准静态3000~4500s^-1范围内,M1600钢形变吸收的能量随应变速率的提高先增加后减少,应变速率为3000s^-1时,M1600钢吸收能量最多,为321.3J/cm^3。

A new typical high-strength martensitic M1600steel was dynamic stretching tested by Hopkinson bar to study its strain rate sensitivity,fracture mode and energy absorption characteristics.The resuhs show that M1600steel has a certain strain rate sensitivity which increases with the increase of strain rate.The fracture mechanism changes with the increase of train rate and affects the plasticity of the steel. The elongation of M1600reaches the highest value 20.5%at 3000s^-1.The absorbed energy of M1600decreases with the increase of strain rate from 3000s^-1to 4500s^-1under quasi-static condition,and has the highest value 321.3J/cm^3at 3000s^-1.