Effect of Hard Sand on the Impact Wear Behavior of TC4 Alloy

The impact test of TC4 titanium alloy with the environment hard sand was carried out, using a new kind of impact wear test rig. The effects of particle size (120~380 μm) and impact cycle were studied. The results show that the size of sand particles significantly affected the impact wear behavior. In the process of impact, hard sand particles cut and squeezed the sample surface constantly, resulting in increasing loss of material. As the particles size was increased, the wear area increased, and the peak of impact force, the wear depth and the energy absorption rate of the interface increased firstly and then decreased. Increasing the impact cycles increased both the peak of impact force and the energy absorption rate, and the wear was severe. The wear mechanism of TC4 titanium alloy in hard sand environment mainly indicated microscopic cutting and exfoliation generated due to the edges of sand.