Tribological Properties of Nickel-Based Superalloys GH4141 and K465 in a Wide Temperature Range

The results show that the average friction coefficient of GH4141 alloy exhibits a decreasing trend with increasing temperature, while that of K465 alloy first increases, then decreases, and finally increases again.

At high temperatures of 800 °C and 900 °C, the average friction coefficients of both alloys drop below 0.3, demonstrating excellent high-temperature self-lubricating characteristics. The wear rates of both alloys gradually decrease with increasing temperature. From room temperature to 400 °C, K465 alloy exhibits a lower wear rate than GH4141 alloy, whereas from 600 °C to 900 °C, GH4141 alloy shows a lower wear rate, indicating its superior high temperature wear resistance compared to K465 alloy.