Studies of Fretting Processes in Titanium Implantation Alloys from the Ti-Al-V Group

Fretting wear of components of kinematic pairs used in prosthetics and dental surgery is a significant problem limiting their operating lifetime. This article presents the results of in vitro studies of fretting processes in metal-metal systems. Special attention has been devoted to the degradation of titanium alloys (Ti6Al4V) under simulated conditions of the human oral cavity. Sample surfaces were observed under a microscope, and wear was assessed. Special attention has been devoted to products permanently adsorbed on friction surfaces, which were analyzed by means of spectroscopic methods. Obtained results of studies indicate that two primary mechanisms: abrasive (secondary) wear and adhesive wear, make up fretting wear.The products that mainly form as a result of friction are oxides. To limit fretting wear, it is beneficial to apply lubricants containing friction modifiers and isolating the area of contact from oxygen. Observations made over the course of studies have brought knowledge and will contribute to better identification of fretting wear mechanisms in biomaterials.