Fretting fatigue behaviors of Ag-tin soft solid lubricating films on titanium alloy

The soft solid lubricating composite films of Ag with varying TiN contents (Ag-TiN) were deposited on a Ti-6Al-4V alloy using ion-assisted magnetron sputtering. The FF resistance of Ag-TiN composite films was investigated using home-made FF devices. The results show that the FF resistance of titanium alloy can be improved by the Ag-TiN composite films, which were fabricated with Ag solid lubricating film doped with hard TiN phase (Ag 60~80 at. % Ag atomic fraction) were produced by the ion assisted magnetron sputtering deposition process. This is attributed that the composite films have better strength-toughness comprehensive behavior, friction lubrication property, high bonding strength and the existing residual compressive stress.