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

IF 1.3 4区材料科学 Q3 MATERIALS SCIENCE, CERAMICS Advances in Applied Ceramics Pub Date : 2023-05-19 DOI:10.1080/17436753.2023.2227446

W. Jibran, P. Wanjara, Javad Gholipour Baradari, Maria Ophelia Jarligo, A. McDonald

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引用次数: 1

Abstract

ABSTRACT 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.

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采用冷喷涂和搅拌摩擦工艺对高强度铝-氧化铝金属基复合涂层进行局部表面改性

本研究提出了一种不影响基材强度的高强度冷加工铝(Al)合金表面修复的新方法。采用低压冷喷涂技术制备了Al - Al2O3金属基复合材料覆盖层，并在铝合金上沉积了不同浓度的Al2O3。采用搅拌摩擦工艺(FSP)对基材上的覆盖层进行分散和固结。FSP改善了涂层中Al2O3颗粒的分布，降低了Al2O3颗粒之间的平均自由程。FSP后涂层硬度提高。与喷涂状态相比，fsped后覆盖层的磨损率也较低。涂层的拉伸性能得到了显著改善，这是由于Al2O3颗粒在基体中的分散得到了改善，而延展性的增强是由于在FSP过程中Al的再结晶可能导致的晶粒细化。

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来源期刊

Advances in Applied Ceramics 工程技术-材料科学：硅酸盐

CiteScore

4.40

自引率

4.50%

发文量

审稿时长

5.2 months

期刊介绍： Advances in Applied Ceramics: Structural, Functional and Bioceramics provides international coverage of high-quality research on functional ceramics, engineering ceramics and bioceramics.