Dynamic compressive mechanical properties of V-5Cr-5Ti at room temperature

Strain rate effect tests,limited strain tests and cumulated strain tests were conducted on a vanadium-based alloy(V-5Cr-5Ti) respectively by using a split-Hopkinson pressure bar(SHPB) system at room temperature.The effects of strain rate and strain cumulating on the dynamic compressive mechanical properties of V-5Cr-5Ti were analyzed.The microstructures of the specimens before and after dynamic compression were investigated by applying an optical microscope.The experimental results show that the dynamic properties of V-5Cr-5Ti exhibit obvious sensitivity to the strain rates and the strain history,and the effect of strain history is more obvious.For specimens at high strain rates,the twins appear when the strain is smaller than 0.20,and the twins decrease while the strain is larger than 0.20.