Unveiling the temperature effect on reciprocating sliding wear mechanism of a TA15 alloy fabricated by wire-arc additive manufacturing

TA15 alloy has been widely used for load-bearing structural components in aircraft engines and subjected to sliding wear at different temperatures in operation. Therefore, the temperature effect on sliding wear mechanism of a TA15 alloy fabricated by wire-arc additive manufacturing was investigated in detail. Results showed that the coefficient of friction and wear volume exhibited multi-stage changes with increasing temperature. As the temperature increased, the crack morphology changed from randomly distributed pores to delamination cracks. The classic oxidative wear model collapsed at high temperatures. We modify the model by introducing dissipated energy and delamination coefficient to accurately predict the wear volume of TA15 alloy.