Abstract
The rotational fretting of Ti6Al4V titanium alloy flat against silicon nitride (Si3N4) ceramics ball has been investigated by using a special rotational fretting wear test rig. Under various parameters of normal load and angular displacement amplitude, three fretting regimes were observed (i.e. partial slip regime, mixed fretting regime, and slip regime), corresponding to the different evolutions of the running condition at the contact interface. The micro-examination of the wear scars revealed an accumulation of plastic deformation within the centre of the wear scars in the gross slip condition. The damage mechanisms in the different fretting regimes were analysed in detail. The results showed that the mechanisms were quite different in the different fretting regimes.
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