Study on sensitivity of adiabatic shear of TC6 alloy under different strain rate and morphology

Using the technology of split Hopkinson Bar, the dynamic shearing experiments on TC6 titanium alloy with different heat treatment have been carried out. The adiabatic shearing sensitivity under different morphology and different strain rate has been studied. Also, metallographic analysis has been done. It is shown that the shape of morphology has great effect on adiabatic shearing sensitivity of TC6 titanium alloy. The lamellar morphology has the lowest adiabatic shearing sensitivity while the spherical morphology has the highest. With increase of α phase content, the adiabatic shearing sensitivity increases. In the same morphology, with decrease of grain size, the adiabatic shearing sensitivity reduces. With increase of the strain rate, the adiabatic shearing sensitivity increases.