冲击速度对20Cr和40Cr钢应变速率、动态屈服强度作用的研究

Effect of Impact Velocity on Strain Rate and Dynamic Yield Strength of 20Cr and 40Cr

研究了不同热处理状态的２０Ｃｒ和４０Ｃｒ钢在不同冲击速度（ｖ）下，应变速率（ε）和动态屈服强度（σα）的变化规律，研究表明：σα＝σ０ｅｘｐ（Ａｌｎε），ε＝ε０ｅｘｐ（Ｂｖ），σα＝σ０ｅｘｐ（Ｃｖ）．其中只有两个是独立的，并用粘塑性本构理论分析了微观作用机制。

The law of strain rate εand dynamic yield strength σ under a series of impact velocity v on 40Cr and 20Cr that have variant heating conditions had been researched,the result is: σα=σ0exp(Alnε),ε=ε0exp(Bv),σα=σ0exp(Cv),where only two is independent.The microstructures had been studied by using viscoplastic theory.