The wear behavior and mechanism of TC11 (pins) and AISI M2 (disks) under different test conditions were studied. The results show that tribo-layers formed on the worn surfaces of both TC11 alloy and AISI M2 steel. As for TC11 alloys at 25 °C, the wear rate increased to high values with an increase in the load; and abrasive wear and adhesive wear prevailed. However, at 600 °C, the wear rate decreased sharply and oxidative wear prevailed. As for AISI M2 steels, at 25 and 600 °C, the wear rates were relatively low. The wear mechanisms at 25 and 600 °C were abrasive wear and oxidative wear, respectively. The wear rates of AISI M2 steel were lower than those of TC11 alloy at 25 and 600 °C. The wear performance of the tribo-pair was noticed to be closely related to their mutual contact mode except for the test conditions and the pin and disk materials, and the intermittent contact mode reduced wear of AISI M2 steel.
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This work is financially supported by Jiangsu Provincial Key Laboratory for Interventional Medical Devices (No. jr1506) and the initial fund of Jiangsu University Senior Talent (No. 15JDG076) is gratefully acknowledged.