Abstract
The effect of Ni-TiC composite film coating formed by reactive ion plating on fretting fatigue behavior in high strength steel was studied. The friction coefficient between a fatigue specimen and the fretting pad decreased by the presence of film coating. The fretting fatigue strength at 107 cycles increased by 25% over that of the uncoated specimen when the specimen was coated even if the pad was not coated, while it remained unchanged when only the pad was coated. The plain fatigue strength decreased by 20% by the coating. It was shown that the plain fatigue strength and the fretting fatigue strength of the steel were not affected by thermal history during the ion plating process. It is probable that the film itself has resistance to fretting fatigue since the increase in fretting fatigue strength by the film coating cannot be readily explained only by the decrease in friction coefficient.
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