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Localised surface modification of high-strength aluminium–alumina metal matrix composite coatings using cold spraying and friction stir processing

DOITrouver le DOI : https://doi.org/10.1080/17436753.2023.2227446
AuteurRechercher : ; Rechercher : 1Identifiant ORCID : https://orcid.org/0000-0001-7662-984X; Rechercher : 1Identifiant ORCID : https://orcid.org/0000-0002-1853-919X; Rechercher : ; Rechercher :
Affiliation
  1. Conseil national de recherches Canada. Aérospatiale
Bailleur de fondsRechercher : Natural Sciences and Engineering Research Council of Canada under a Discovery Grant
FormatTexte, Article
Résumé
This study presents a novel approach for surface repairs of high-strength, cold-worked aluminium (Al) alloys, without negatively affecting the base material strength. Low-pressure cold spraying was used to fabricate Al–Al₂O₃ metal matrix composite overlays, with varying concentrations of Al₂O₃ deposited on an Al alloy. Friction stir processing (FSP) was employed to disperse and consolidate the overlay coating on the base material. The FSP was found to improve the Al₂O₃ particle distribution in the coating and reduce the mean free path between Al₂O₃ particles. The coating hardness increased after FSP. The post-FSPed overlays also exhibited lower wear rates compared to the as-sprayed condition. Remarkable improvement was observed in the tensile properties of the coatings, which were attributed to the improved dispersion of Al₂O₃ particles in the matrix, while the enhanced ductility was attributed to the possible grain refinement that occurred due to the recrystallisation of Al during FSP.
Date de publication
Maison d’éditionSAGE Publications
Institute of Materials, Minerals and Mining (UK)
Dans
  • Advances in Applied Ceramics: Structural, Functional and Bioceramics 122, nº 3-4 (mai 2023) : 181–196.
Langueanglais
Publications évaluées par des pairsOui
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Identificateur de l’enregistrement8a8a2bf2-4cf1-4e0a-a2f4-bb445acba8a5
Enregistrement créé2024-09-06
Enregistrement modifié2024-09-06

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