The purpose of this work is to investigate the fretting wear properties of Nimonic 263 at different operating temperatures. Experiments were carried out under different operating conditions ranging between 100 °C to 900 °C with a different frequency of 5 Hz, and a contact surface displacement of 5 mm. It was found that signs of low friction and wear were dominant at high temperatures like 500 °C onwards. This was due to the presence of the oxidation layers formed during fretting action. On the other hand, higher wear and friction profiles were observed at low temperatures; especially at 100 °C and 300 °C. The SEM analysis showed the severe surface damages in the form of jagged and groove patterns were dominant, particularly at low temperatures. It was found that the changes in wear rate and friction coefficient at high temperatures were due to oxidation layers that undergone a continuous fretting action, forming protective oxide films, thus decreasing the wear and friction rates. The debris analysis indicated that mildoxidised metallic roll-like debris was mostly found at low temperatures, while oxidised roll-like debris was found at high temperatures. It was observed that the fretting behaviour existed at low temperatures, while the fretting and oxidative behaviour existed at high temperatures.

Jurnal Tribologi 24 (2020) 1-14