S0401-2-4 硬質薄膜を被膜したチタン合金のフレッティング疲労特性([S0401-2]表面改質および薄膜コーティング(2))

概要

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Fretting fatigue tests were performed using titanium alloy with CrN thin film and alumina pad to examine the effect of hard thin film coating and pad material on fretting fatigue properties of coated titanium alloy. CrN films were deposited at two different bias voltages by arc ion plating method in order to control the film hardness and residual stress. As the result, fretting fatigue life was improved by the deposition of CrN film, especially, the effect was obviously for low bias voltage deposition sample. However, the fretting fatigue strength of high bias voltage deposition sample was clearly decreased above N=4×10^5 cycles, which was lower than that of uncoated samples. Fretting fatigue life against alumina pad was longer than that against Ti-6Al-4V pad in low stress amplitude region.
2010-09-04