Host: The Japan Society of Mechanical Engineers
Name : Mechanical Engineering Congress,Japan
Date : September 11, 2016 - September 14, 2016
In recent years, the demand for artificial joints has increased. As society has aged significantly, it has become necessary to increase the lifespan of artificial joints. The purpose of this study is to evaluate the effects of surface texturing, which is a technique of fine patterning the surface to modify the frictional behavior and corrosion resistance, on titanium materials that are widely used in artificial joints. Titanium and its alloys have excellent corrosion resistance while possessing low wear resistance. The materials used were pure titanium and Ti-6Al-4V alloy. The texturing of the specimen surface was achieved by applying parallel, 1 mm deep grooves at several pitches. Friction and corrosion tests were performed in physiological saline. The textured specimens maintained corrosion resistance. An improvement in abrasion resistance was seen as the pitch of the parallel grooves was reduced. The wear properties were also improved by reducing the pitch of the parallel grooves. However, the wear properties of the textured surface were lower than those of the flat surface. These results indicate that the design of the texturing should be examined to improve the wear characteristics. Therefore, new coating and cladding technology Micro Spark Coating (MSC) was noticed. This coating is high in the hardness and wear resistance. In addition, craters by the electric discharge pulse were formed on the surface. The wear resistance of the coating surface was high. It is planned to carry out the experiment in MSC surface in order to evaluate a fluid lubrication state.
