Abstract: The dynamic compression properties of three kinds of alloy steels (material A,  B and C) were tested with the split Hopkinson pressure bar (SHPB) in the range of strain rate 500 s-1～7 500 s-1 respectively. The experimental results show that the yield stress of material A is the largest, and that of material B is the smallest.  The strain rate effects of both materials A and B are not obvious in the range of strain rate 500 s-1～6 000 s-1,  and weak strain rate effects appear in the range of strain rate 6 000 s-1～7 500 s-1.  The dynamic stress-strain curves of both materials A and B have strain hardening phenomena. The strain rate effect of material C is not obvious in the range of strain rate 500 s-1～7 500 s-1,  but the strain hardening phenomenon is remarkable.

Key words: vibration and wave , impact dynamics , alloy steels , SHPB , high strain rates

摘要： 利用分离式霍普金森杆（SHPB）对三种合金钢A、B、C的动态压缩性能（应变率500 s-1～7 500 s-1）进行研究。结果表明：三种材料中A的压缩屈服强度最高，其次为C，B的强度最低；材料A、B在应变率500 s-1～6 000 s-1范围内均没有表现出明显的应变率效应，在应变率7 500 s-1下表现出较弱的应变率效应；这两种材料的压缩曲线形态相似，均表现出一定的应变硬化。C材料在整个应变率范围内均未表现出应变率效应，表现出一定的应变硬化。

关键词: 振动与波, 冲击动力学, 合金钢, SHPB, 高应变率