Effects of temperature on the tribological behavior of Al

Effects of temperature on the tribological behavior of Al_(0.25)CoCrFeNi high-entropy alloy

英文篇名：Effects of temperature on the tribological behavior of Al_(0.25)CoCrFeNi high-entropy alloy
作者：L.M.Du ; L.W.Lan ; S.Zhu ; H.J.Yang ; X.H.Shi ; P.K.Liaw ; J.W.Qiao
英文作者：L.M.Du;L.W.Lan;S.Zhu;H.J.Yang;X.H.Shi;P.K.Liaw;J.W.Qiao;Research Center for High-Entropy Alloys, College of Materials Science and Engineering, Taiyuan University of Technology;National Key Laboratory for Remanufacturing, Academy of Armored Forces Engineering;Department of Materials Science and Engineering, The University of Tennessee;
英文关键词：Abrasive wear;;Friction and wear characteristics;;Hardness;;High temperature;;Microstructure;;Oxidation;;Rapid solidification;;Sliding;;Wear mechanism
中文刊名：CLKJ
英文刊名：材料科学技术(英文版)
机构：Research Center for High-Entropy Alloys, College of Materials Science and Engineering, Taiyuan University of Technology;National Key Laboratory for Remanufacturing, Academy of Armored Forces Engineering;Department of Materials Science and Engineering, The University of Tennessee;
出版日期：2019-05-15
出版单位：Journal of Materials Science & Technology
年：2019
期：v.35
基金：the opening project from National Key Laboratory for Remanufacturing (No. 61420050204);; the Department of Energy (DOE), Office of Fossil Energy, National Energy Technology Laboratory (DE-FE-0011194), with Mr. V. Cedro, Mr. R. Dunst, and Dr. J. Mullen as program managers;; the support of the U.S. Army Research Office project (W911NF-13-1-0438) with the program manager, Dr. M. P. Bakas and Dr. D. M. Stepp;; support from the National Science Foundation (DMR-1611180) with the program directors, Dr. G. J. Shiflet and D. Farkas
语种：英文;
页：CLKJ201905026
页数：9
CN：05
ISSN：21-1315/TG
分类号：217-225

摘要

The tribological behavior of Al_(0.25) CoCrFeNi high-entropy alloy(HEA) sliding against Si_3N_4 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°.
The tribological behavior of Al_(0.25) CoCrFeNi high-entropy alloy(HEA) sliding against Si_3N_4 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°.

引文

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