Abstract
The dynamic compressive properties of extruded VW75 and VW75+Ti alloys were investigated by using a split Hopkinson pressure bar (SHPB) at 25°C under high strain rates of 1, 600-2, 700 s-1 in the present work, and the microstructure evolution after deformation was inspected by OM, SEM, and EBSD. The results demonstrated that the maximum stress value rises with the escalating strain rate in the course of impact, and the true stress-true strain curves of the two alloys exhibit strain strengthening and positive strain effect. The addition of Ti particles refines alloy grains, increases fracture strength, and decreases the twinning ratio.
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