Effects of temperature on the tribological behavior of Al0.25CoCrFeNi high-entropy alloy. Issue 5 (May 2019)

• Record Type: Journal Article
• Authors: Du, L.M.; Lan, L.W.; Zhu, S.; Yang, H.J.; Shi, X.H.; Liaw, P.K.; Qiao, J.W.
• Is Part Of: Journal of materials science & technology. Volume 35:Issue 5(2019)
• Page Start: 917
• Page End: 925
• Publication Date: 2019-05
• Subjects: Abrasive wear -- Friction and wear characteristics -- Hardness -- High temperature -- Microstructure -- Oxidation -- Rapid solidification -- Sliding -- Wear mechanism; Metals -- Periodicals; Materials science -- Periodicals; Materials science; Metals; Periodicals; 620.1105
• DOI: 10.1016/j.jmst.2018.11.023
• Languages: English
• ISSNs: 1005-0302

Abstract

Abstract: The tribological behavior of Al0.25 CoCrFeNi high-entropy alloy (HEA) sliding against Si3 N4 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 ℃.