The effect of TiN/Ti composite film and multilayer on fretting fatigue resistance of ti811 alloy at elevated temperature

TiN/Ti composite film was prepared on Ti811 surface by vacuum cathode arc deposition (VCAD) and magnetron sputtering (MS) technique, respectively. TiN/Ti multilayer was deposited by MS. The composition distribution, bonding strength, micro-hardness and ductility of the films were measured. The effects of the films with different structures on the tribological property and fretting fatigue (FF) resistance of the titanium alloy substrate at elevated temperature were comparatively studied. The results indicated that both the TiN/Ti composite film and the TiN/Ti multilayer effectively increased the hardness and wear resistance of the titanium alloy. The VCAD TiN/Ti composite film could significantly improve the FF resistance of the titanium alloy and was better than the MS TiN/Ti composite film because of the good toughness and high bonding strength of the VCAD TiN/Ti composite film with excellent lubrication of Ti particles in the film. The MS TiN/Ti multilayer were more effective in improving FF resistance than MS TiN/Ti composite film because the former had good toughness and antifriction properties.