Abstract
Fretting fatigue characteristic of Ti-6Al-4V with various contact pressures were carried out using fatigue testing machine. The fretting fatigue limit of Ti-6Al-4V at 10^7cycles were σ=150MPa for CP=30, 40, 60MPa and 120MPa for CP=10MPa. In the low-cycle region (10^4-10^5 cycles), fatigue life decreases with increasing of the contact pressure. The other hand, in the high-cycle region (10^6 cycles), fatigue life decreases with decreasing of the contact pressure because of relative slip. Fretting fatigue crack initiating from contact area was observed. Then crack growth is radial.
