Microstructure and tribological property of CoCrFeMoNi High entropy alloy treated by ion sulfurization
The microstructures and tribological properties of CoCrFeMoNi high entropy alloy (HEA) before and after sulfurization were compared and discussed in the present study. The results showed that the CoCrFeMoNi HEA was mainly composed of FCC solid solution. After being sulfurized at 260℃ for 2 h, the Fe...
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doaj-85137b7e2efd46d48fd9b217b518b3b62020-11-25T03:58:34ZengElsevierJournal of Materials Research and Technology2238-78542020-03-019225982609Microstructure and tribological property of CoCrFeMoNi High entropy alloy treated by ion sulfurizationGang Cui0Bin Han1Ying Yang2Yong Wang3Hu Chunyang4College of Materials Science and Engineering. China University of Petroleum, Qingdao 266580, ChinaCollege of Materials Science and Engineering. China University of Petroleum, Qingdao 266580, China; State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China; Corresponding author.College of Materials Science and Engineering. China University of Petroleum, Qingdao 266580, ChinaCollege of Materials Science and Engineering. China University of Petroleum, Qingdao 266580, ChinaCollege of Materials Science and Engineering. China University of Petroleum, Qingdao 266580, ChinaThe microstructures and tribological properties of CoCrFeMoNi high entropy alloy (HEA) before and after sulfurization were compared and discussed in the present study. The results showed that the CoCrFeMoNi HEA was mainly composed of FCC solid solution. After being sulfurized at 260℃ for 2 h, the FeS/MoS2 multisulfides solid lubricant films with a thickness of approximately 5.0 μm were successfully fabricated and well combined with the HEA. The stable friction coefficients and weight losses of the sulfurized HEA (0.15 and 4.25 mg) were decreased obviously than the original HEA (0.47 and 15.1 mg). At the beginning of the friction, the friction coefficient of the sulfurized HEA was easier to reach into stable stage. Because of the synergistic work of FeS and MoS2 lubricant phases, the sulfides boundary lubricant films were formed in the later stage of friction under the wearing condition, which could help the friction system work for longer time under lower friction coefficient. Keywords: Laser cladding, Ion sulfurization, High entropy alloy, Multisulfides film, Tribological propertyhttp://www.sciencedirect.com/science/article/pii/S223878541931364X |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Gang Cui Bin Han Ying Yang Yong Wang Hu Chunyang |
spellingShingle |
Gang Cui Bin Han Ying Yang Yong Wang Hu Chunyang Microstructure and tribological property of CoCrFeMoNi High entropy alloy treated by ion sulfurization Journal of Materials Research and Technology |
author_facet |
Gang Cui Bin Han Ying Yang Yong Wang Hu Chunyang |
author_sort |
Gang Cui |
title |
Microstructure and tribological property of CoCrFeMoNi High entropy alloy treated by ion sulfurization |
title_short |
Microstructure and tribological property of CoCrFeMoNi High entropy alloy treated by ion sulfurization |
title_full |
Microstructure and tribological property of CoCrFeMoNi High entropy alloy treated by ion sulfurization |
title_fullStr |
Microstructure and tribological property of CoCrFeMoNi High entropy alloy treated by ion sulfurization |
title_full_unstemmed |
Microstructure and tribological property of CoCrFeMoNi High entropy alloy treated by ion sulfurization |
title_sort |
microstructure and tribological property of cocrfemoni high entropy alloy treated by ion sulfurization |
publisher |
Elsevier |
series |
Journal of Materials Research and Technology |
issn |
2238-7854 |
publishDate |
2020-03-01 |
description |
The microstructures and tribological properties of CoCrFeMoNi high entropy alloy (HEA) before and after sulfurization were compared and discussed in the present study. The results showed that the CoCrFeMoNi HEA was mainly composed of FCC solid solution. After being sulfurized at 260℃ for 2 h, the FeS/MoS2 multisulfides solid lubricant films with a thickness of approximately 5.0 μm were successfully fabricated and well combined with the HEA. The stable friction coefficients and weight losses of the sulfurized HEA (0.15 and 4.25 mg) were decreased obviously than the original HEA (0.47 and 15.1 mg). At the beginning of the friction, the friction coefficient of the sulfurized HEA was easier to reach into stable stage. Because of the synergistic work of FeS and MoS2 lubricant phases, the sulfides boundary lubricant films were formed in the later stage of friction under the wearing condition, which could help the friction system work for longer time under lower friction coefficient. Keywords: Laser cladding, Ion sulfurization, High entropy alloy, Multisulfides film, Tribological property |
url |
http://www.sciencedirect.com/science/article/pii/S223878541931364X |
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