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Dry-sliding tribological properties of AlCoCrFeNiTi0.5 high-entropy alloy

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Abstract

High-entropy alloys (HEAs), with a new alloying concept, could possess many unique mechanical and functional properties. The current work investigated whether one such alloy offers potential for bearing surfaces under dry conditions. The dry, reciprocating sliding wear characteristics of AlCoCrFeNiTi0.5 alloy were investigated under various applied loads and sliding speeds. Transmission electron microscopy (TEM) and scanning electron microscopy (SEM) were utilized to characterize internal structure and wear surfaces of the alloy, respectively. It is found that the AlCoCrFeNiTi0.5 alloy preserves better wear resistance than Fe77Ni23 solid solution alloy, Ti-46Al-2Cr-2Nb intermetallic alloy, or a wear-resistant steel AISI 52100, especially under higher loads. The wear rate increases slowly with the applied loads increasing and keeps steady under different sliding speeds. The wear mechanisms are abrasive wear, adhesive wear and oxidative wear. The nano-sized Fe–Cr solid solution and Al–Ni–Ti rich intermetallic phase precipitated in the dendritic regions and the formation of oxidation play important roles in the good wear resistances of this high-entropy alloy.

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Acknowledgements

This study was financially supported by the National Natural Science Foundation of China (No. 51271151) and the Program of Introducing Talents of Discipline to Universities (No. B08040).

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Authors and Affiliations

  1. State Key Laboratory of Solidification Processing, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi’an, 710072, China

    Yuan Yu, Jun Wang, Jin-Shan Li, Hong-Chao Kou & Si-Zhe Niu

  2. State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, 730000, China

    Sheng-Yu Zhu, Jun Yang & Wei-Min Liu

Authors
  1. Yuan Yu
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  2. Jun Wang
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  3. Jin-Shan Li
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  4. Hong-Chao Kou
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  5. Si-Zhe Niu
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  6. Sheng-Yu Zhu
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  7. Jun Yang
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  8. Wei-Min Liu
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Correspondence to Jin-Shan Li.

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Yu, Y., Wang, J., Li, JS. et al. Dry-sliding tribological properties of AlCoCrFeNiTi0.5 high-entropy alloy. Rare Met. 41, 4266–4272 (2022). https://doi.org/10.1007/s12598-016-0815-3

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  • DOI: https://doi.org/10.1007/s12598-016-0815-3

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