Tribo-corrosion response of additively manufactured high-entropy alloy

Abstract High-entropy alloys (HEAs) with multiple principal elements represent a paradigm shift in structural alloy design and show excellent surface degradation resistance in corrosive environment. Here, the tribo-corrosion response of laser-engineered net-shaped CoCrFeMnNi HEA was evaluated in 3.5...

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Autores principales:	Jibril Shittu, Maryam Sadeghilaridjani, Mayur Pole, Saideep Muskeri, Jie Ren, Yanfang Liu, Ismael Tahoun, Harpreet Arora, Wen Chen, Narendra Dahotre, Sundeep Mukherjee
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Materials of engineering and construction. Mechanics of materials TA401-492
Acceso en línea:	https://doaj.org/article/918452895309449ea423642e22b498b4
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spelling	oai:doaj.org-article:918452895309449ea423642e22b498b42021-12-02T17:47:15ZTribo-corrosion response of additively manufactured high-entropy alloy10.1038/s41529-021-00177-22397-2106https://doaj.org/article/918452895309449ea423642e22b498b42021-06-01T00:00:00Zhttps://doi.org/10.1038/s41529-021-00177-2https://doaj.org/toc/2397-2106Abstract High-entropy alloys (HEAs) with multiple principal elements represent a paradigm shift in structural alloy design and show excellent surface degradation resistance in corrosive environment. Here, the tribo-corrosion response of laser-engineered net-shaped CoCrFeMnNi HEA was evaluated in 3.5 wt% NaCl solution at room temperature. The additively manufactured (AM-ed) CoCrFeMnNi showed five times lower wear rate, regenerative passivation, and nobler corrosion potential during tribo-corrosion test compared to its arc-melted counterpart. A significant anisotropy was seen in the tribo-corrosion response with 45° to the build direction showing better performance compared to tests along the build direction and perpendicular to it. The open circuit potential curves were characterized by a sharp drop to more negative values as wear began, followed by continuous change for the active tribo-corrosion duration and finally a jump to nobler value at the end of the test indicating excellent surface re-passivation for the AM-ed alloy. The superior tribo-corrosion resistance of AM-ed CoCrFeMnNi was attributed to the refined microstructure and highly protective surface passivation layer promoted by the sub-grain cellular structure formed during additive manufacturing. These results highlight the potential of utilizing additive manufacturing of HEAs for use in extreme environments that require a combination of tribo-corrosion resistance, mechanical durability, extended service life, and net shaping with low dimensional tolerance.Jibril ShittuMaryam SadeghilaridjaniMayur PoleSaideep MuskeriJie RenYanfang LiuIsmael TahounHarpreet AroraWen ChenNarendra DahotreSundeep MukherjeeNature PortfolioarticleMaterials of engineering and construction. Mechanics of materialsTA401-492ENnpj Materials Degradation, Vol 5, Iss 1, Pp 1-8 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Materials of engineering and construction. Mechanics of materials TA401-492
spellingShingle	Materials of engineering and construction. Mechanics of materials TA401-492 Jibril Shittu Maryam Sadeghilaridjani Mayur Pole Saideep Muskeri Jie Ren Yanfang Liu Ismael Tahoun Harpreet Arora Wen Chen Narendra Dahotre Sundeep Mukherjee Tribo-corrosion response of additively manufactured high-entropy alloy
description	Abstract High-entropy alloys (HEAs) with multiple principal elements represent a paradigm shift in structural alloy design and show excellent surface degradation resistance in corrosive environment. Here, the tribo-corrosion response of laser-engineered net-shaped CoCrFeMnNi HEA was evaluated in 3.5 wt% NaCl solution at room temperature. The additively manufactured (AM-ed) CoCrFeMnNi showed five times lower wear rate, regenerative passivation, and nobler corrosion potential during tribo-corrosion test compared to its arc-melted counterpart. A significant anisotropy was seen in the tribo-corrosion response with 45° to the build direction showing better performance compared to tests along the build direction and perpendicular to it. The open circuit potential curves were characterized by a sharp drop to more negative values as wear began, followed by continuous change for the active tribo-corrosion duration and finally a jump to nobler value at the end of the test indicating excellent surface re-passivation for the AM-ed alloy. The superior tribo-corrosion resistance of AM-ed CoCrFeMnNi was attributed to the refined microstructure and highly protective surface passivation layer promoted by the sub-grain cellular structure formed during additive manufacturing. These results highlight the potential of utilizing additive manufacturing of HEAs for use in extreme environments that require a combination of tribo-corrosion resistance, mechanical durability, extended service life, and net shaping with low dimensional tolerance.
format	article
author	Jibril Shittu Maryam Sadeghilaridjani Mayur Pole Saideep Muskeri Jie Ren Yanfang Liu Ismael Tahoun Harpreet Arora Wen Chen Narendra Dahotre Sundeep Mukherjee
author_facet	Jibril Shittu Maryam Sadeghilaridjani Mayur Pole Saideep Muskeri Jie Ren Yanfang Liu Ismael Tahoun Harpreet Arora Wen Chen Narendra Dahotre Sundeep Mukherjee
author_sort	Jibril Shittu
title	Tribo-corrosion response of additively manufactured high-entropy alloy
title_short	Tribo-corrosion response of additively manufactured high-entropy alloy
title_full	Tribo-corrosion response of additively manufactured high-entropy alloy
title_fullStr	Tribo-corrosion response of additively manufactured high-entropy alloy
title_full_unstemmed	Tribo-corrosion response of additively manufactured high-entropy alloy
title_sort	tribo-corrosion response of additively manufactured high-entropy alloy
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/918452895309449ea423642e22b498b4
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Tribo-corrosion response of additively manufactured high-entropy alloy

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