Impact Fretting Wear Behavior of Pure Iron under Ball-to-Flat Contact

Impact fretting tests were performed to pure iron (YT3) under ball-to-flat contact, then the dynamic behavior and wear behavior were investigated within different impact conditions. Results indicate that the impact force and energy absorption rate of samples were increased with the improvement of impact energy. The wear volume and wear rate were enlarged under higher impact energy. The value of peak contact force and energy absorption rate increased further when the impact mass increased under the same kinetic energy, while the wear degree was alleviated. The worn surface of samples was characterized by the delamination and spalling under the scanning electron microscopy observation, the main imact wear mechanism was delamination. And energy dispersive X-ray detector analysis found that the oxidation occurred and became more serious as close to the edge of scars.