@article{e2b6c230a03f4b4d83b0a8e2bf47d56a,
title = "Microstructure characterization of AlCrFeCoNi high-entropy alloy coating on Inconel 718 by electrospark deposition",
abstract = "Recent scientific advancements in the field of high entropy alloys have sparked significant interest due to their exceptional performance across diverse environments. These properties are particularly valuable in surface protection engineering, where the selection of appropriate coating materials can profoundly impact the cost and properties of high-performance components. Consequently, understanding their compatibility with conventional engineering alloys is crucial. This study presents a detailed microstructural analysis of as-deposited and heat-treated AlCrFeCoNi HEA coatings on Inconel 718 substrate, fabricated via electrospark deposition. The as-deposited coatings exhibited cellular grains predominantly composed of the BCC phase, showing minimal elemental segregation. Subsequent heat treatment induced FCC and σ precipitate formation in the coatings, leading to noticeable elemental and phase segregation. Comprehensive characterization using X-ray diffraction, nano-indentation, and microhardness testing investigate the metallurgical and mechanical properties of the fabricated coatings. Wear resistance tests demonstrated that HEA-based coatings hold promise for enhancing surface wear resistance.",
keywords = "Coating, Electrospark deposition, Heat treatment, High entropy alloy, Microstructure, Nano-indentation, Wear test",
author = "Jihui Yan and Lopes, {Joao G.} and Kevin Chan and Nigel Scotchmer and Oliveira, {Joao P.} and Zhou, {Y. Norman} and Peng Peng",
note = "info:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/LA%2FP%2F0037%2F2020/PT# info:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDP%2F50025%2F2020/PT# info:eu-repo/grantAgreement/FCT/Concurso de avalia{\c c}{\~a}o no {\^a}mbito do Programa Plurianual de Financiamento de Unidades de I&D (2017%2F2018) - Financiamento Base/UIDB%2F50025%2F2020/PT# info:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDB%2F00667%2F2020/PT# info:eu-repo/grantAgreement/FCT//2020.07350.BD/PT# Funding Information: This work was supported by the Natural Sciences and Engineering Research Council of Canada (NSERC) Alliance grant. JPO acknowledges the funding by national funds from FCT - Funda{\c c}{\~a}o para a Ci{\^e}ncia e a Tecnologia, I.P., in the scope of the projects LA/P/0037/2020, UIDP/50025/2020 and UIDB/50025/2020 of the Associate Laboratory Institute of Nanostructures, Nanomodelling and Nanofabrication – i3N. JGL acknowledges Funda{\c c}{\~a}o para a Ci{\^e}ncia e a Tecnologia (FCT - MCTES) for its financial support via the project UID/00667/2020 (UNIDEMI) and for funding the Ph.D. grant 2020.07350.BD. Publisher Copyright: {\textcopyright} 2025 Elsevier Inc.",
year = "2025",
month = jul,
doi = "10.1016/j.matchar.2025.115139",
language = "English",
volume = "225",
journal = "Materials Characterization",
issn = "1044-5803",
publisher = "Elsevier Science B.V., Amsterdam.",
}