Microstructural properties and wear resistance of Fe-Cr-Co-Ni-Mo-based high entropy alloy coatings deposited with different coating techniques

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dc.contributor.authorOppong Boakye, Gifty
dc.contributor.authorGeambazu, Laura E.
dc.contributor.authorOrmsdottir, Arna M.
dc.contributor.authorGunnarsson, Baldur G.
dc.contributor.authorCsaki, Ioana
dc.contributor.authorFanicchia, Francesco
dc.contributor.authorKovalov, Danyil
dc.contributor.authorKarlsdottir, Sigrun N.
dc.date.accessioned2022-03-28T15:43:29Z
dc.date.available2022-03-28T15:43:29Z
dc.date.issued2022-03-19
dc.description.abstractMaterials can be subjected to severe wear and corrosion due to high temperature, high pressure and mechanical loads when used in components for the production of geothermal power. In an effort to increase the lifetime of these components and thus decrease cost due to maintenance High-Entropy Alloy Coatings (HEACs) were developed with different coating techniques for anti-wear properties. The microstructure, mechanical and tribological properties of CoCrFeNiMox (at% x = 20, 27) HEACs deposited by three different technologies—high-velocity oxygen fuel (HVOF), laser cladding (LC) and electro-spark deposition (ESD)—are presented in this study. The relationship between surface morphology and microstructural properties of the as-deposited coatings and their friction and wear behavior is assessed to evaluate their candidacy as coatings for the geothermal environment. The wear rates were lower for the HVOF coatings compared to LC and ESD-produced coatings. Similarly, a higher hardness (445 ± 51 HV) was observed for the HVOF HEACs. The mixed FCC, BCC structure and the extent of σ + µ nano precipitates are considered responsible for the increased hardness and improved tribological performance of the HEACs. The findings from the study are valuable for the development of wear-resistant HEAC for geothermal energy industry applications where high wear is encountered.en_UK
dc.identifier.citationOppong Boakye G, Geambazu LE, Ormsdottir AM, et al., (2022) Microstructural properties and wear resistance of Fe-Cr-Co-Ni-Mo-based high entropy alloy coatings deposited with different coating techniques, Applied Sciences, Volume 12, Issue 6, March 2022, Article number 3156en_UK
dc.identifier.issn2076-3417
dc.identifier.urihttps://doi.org/10.3390/app12063156
dc.identifier.urihttps://dspace.lib.cranfield.ac.uk/handle/1826/17698
dc.language.isoenen_UK
dc.publisherMDPIen_UK
dc.rightsAttribution 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/*
dc.subjectspark depositionen_UK
dc.subjectcladdingen_UK
dc.subjectthermal sprayingen_UK
dc.subjecthigh-entropy alloyen_UK
dc.subjectdry sliding wearen_UK
dc.titleMicrostructural properties and wear resistance of Fe-Cr-Co-Ni-Mo-based high entropy alloy coatings deposited with different coating techniquesen_UK
dc.typeArticleen_UK

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