Abstract
In recent years, the demand for artificial joints has increased. In Japan, aging is in progress. Therefore, it is necessary to increase the lifespan of artificial joints. The purpose of this study is to study the effects of surface texturing, that is a technique of pattering a fine processing of the surface on the frictional behavior and the corrosion reaction of titanium materials that is widely sued in artificial joints. Titanium and its alloys have excellent corrosion resistance while possesses low wear resistance. The materials used were pure titanium and Ti-6Al-4V alloy. The texturing to the specimen surface was achieved by applying parallel grooves of about 1mm depth. The pitches of the grooves were changed. Friction and corrosion tests were performed in physiological saline to simulate the conditions in which artificial joints are used. The surface textured specimens maintained the corrosion resistance. Abrasion resistant improvement was seen by narrowing the pitch of the parallel grooves. Wear properties were improved by narrowing the pitch of the parallel grooves. However, wear properties of textured surface was lower than that of the polished surface. The design of the texturing has to be examined to improve the wear characteristics of titanium and its alloys.
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