Atomic insight into tribological behavior of AlCoCrFeNi high entropy alloy at various nanoscratching conditions
High-entropy alloys (HEAs) have garnered significant interest in recent years due to their exceptional properties. Among the HEAs, the AlCoCrFeNi HEA has been extensively studied due to its outstanding thermal stability and mechanical properties. However, limited attention has been given to its trib...
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sg-ntu-dr.10356-1730232024-01-13T16:48:20Z Atomic insight into tribological behavior of AlCoCrFeNi high entropy alloy at various nanoscratching conditions Kong, Jiyun Luo, Gangjie Tian, Yuanyuan Du, Chunyang School of Mechanical and Aerospace Engineering Singapore Centre for 3D Printing Engineering::Materials Engineering::Mechanical engineering Tribological Behavior Scratching Velocity High-entropy alloys (HEAs) have garnered significant interest in recent years due to their exceptional properties. Among the HEAs, the AlCoCrFeNi HEA has been extensively studied due to its outstanding thermal stability and mechanical properties. However, limited attention has been given to its tribological behavior under high temperature and high velocity conditions. In this study, we first investigate the effect of temperature, scratching velocity, and scratching depth on the tribological behavior of AlCoCrFeNi HEA at the atomic level employing molecular dynamics method. The AlCoCrFeNi HEA exhibits good wear resistance at high temperature due to fewer dislocations to nucleation and slip. Regardless of a significant increase in scratching velocity, there is little difference in the wear volume, indicating that the AlCoCrFeNi HEA still maintains excellent wear resistance even under extremely high scratching velocity. The stacking fault tetrahedron is generated in the AlCoCrFeNi HEA under the large scratching depths of 1.5 nm and 2.0 nm, implying that the wear resistance of AlCoCrFeNi HEA would be improved after the nanoscratching with a relatively large scratching depth. These findings are highly significant for expanding the application potential of AlCoCrFeNi HEA under extreme conditions and provide profound insights into the tribological behavior of the HEA. Published version The authors acknowledge the support by High Performance Complex Manufacturing State Key Laboratory Fund (Kfkt2022-07). 2024-01-09T07:09:47Z 2024-01-09T07:09:47Z 2023 Journal Article Kong, J., Luo, G., Tian, Y. & Du, C. (2023). Atomic insight into tribological behavior of AlCoCrFeNi high entropy alloy at various nanoscratching conditions. Journal of Materials Research and Technology, 27, 7293-7303. https://dx.doi.org/10.1016/j.jmrt.2023.11.150 2238-7854 https://hdl.handle.net/10356/173023 10.1016/j.jmrt.2023.11.150 2-s2.0-85180405764 27 7293 7303 en Journal of Materials Research and Technology © 2023 Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/). application/pdf |
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Engineering::Materials Engineering::Mechanical engineering Tribological Behavior Scratching Velocity Kong, Jiyun Luo, Gangjie Tian, Yuanyuan Du, Chunyang Atomic insight into tribological behavior of AlCoCrFeNi high entropy alloy at various nanoscratching conditions |
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High-entropy alloys (HEAs) have garnered significant interest in recent years due to their exceptional properties. Among the HEAs, the AlCoCrFeNi HEA has been extensively studied due to its outstanding thermal stability and mechanical properties. However, limited attention has been given to its tribological behavior under high temperature and high velocity conditions. In this study, we first investigate the effect of temperature, scratching velocity, and scratching depth on the tribological behavior of AlCoCrFeNi HEA at the atomic level employing molecular dynamics method. The AlCoCrFeNi HEA exhibits good wear resistance at high temperature due to fewer dislocations to nucleation and slip. Regardless of a significant increase in scratching velocity, there is little difference in the wear volume, indicating that the AlCoCrFeNi HEA still maintains excellent wear resistance even under extremely high scratching velocity. The stacking fault tetrahedron is generated in the AlCoCrFeNi HEA under the large scratching depths of 1.5 nm and 2.0 nm, implying that the wear resistance of AlCoCrFeNi HEA would be improved after the nanoscratching with a relatively large scratching depth. These findings are highly significant for expanding the application potential of AlCoCrFeNi HEA under extreme conditions and provide profound insights into the tribological behavior of the HEA. |
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School of Mechanical and Aerospace Engineering |
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School of Mechanical and Aerospace Engineering Kong, Jiyun Luo, Gangjie Tian, Yuanyuan Du, Chunyang |
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Article |
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Kong, Jiyun Luo, Gangjie Tian, Yuanyuan Du, Chunyang |
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Kong, Jiyun |
title |
Atomic insight into tribological behavior of AlCoCrFeNi high entropy alloy at various nanoscratching conditions |
title_short |
Atomic insight into tribological behavior of AlCoCrFeNi high entropy alloy at various nanoscratching conditions |
title_full |
Atomic insight into tribological behavior of AlCoCrFeNi high entropy alloy at various nanoscratching conditions |
title_fullStr |
Atomic insight into tribological behavior of AlCoCrFeNi high entropy alloy at various nanoscratching conditions |
title_full_unstemmed |
Atomic insight into tribological behavior of AlCoCrFeNi high entropy alloy at various nanoscratching conditions |
title_sort |
atomic insight into tribological behavior of alcocrfeni high entropy alloy at various nanoscratching conditions |
publishDate |
2024 |
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https://hdl.handle.net/10356/173023 |
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1789483087574335488 |