Effects of temperature on the tribological behavior of Al0.25CoCrFeNi high-entropy alloy

By L. Du, L. Lan, S. Zhu, H. J. Yang, X. H. Shi, P. K. Liaw, Junwei Qiao. Journal of Materials Science & Technology, 2019

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Abstract The tribological behavior of Al0.25CoCrFeNi high-entropy alloy (HEA) sliding against Si3N4 ball was investigated from room temperature to 600 ℃. The microstructure of the alloys was characterized by simple FCC phase with 260 HV. Below 300 ℃, with increasing temperature, the wear rate increased due to high temperature softening. The wear rate remained stabilized above 300 ℃ due to the anti-wear effect of the oxidation film on the contact interface. The dominant wear mechanism of HEA changed from abrasive wear at room temperature to delamination wear at 200 ℃, then delamination wear and oxidative wear at 300 ℃ and became oxidative above 300 ℃. Moreover, the adhesive wear existed concomitantly below 300 ℃.

Subfields: Aerospace Engineering, Mechanical Engineering

View Paper: https://www.semanticscholar.org/paper/66fe15b6d49be09e4c25cc21df57db20f729aa24