Wear Resistance Enhancement of Al6061 Alloy Surface Layer by Laser Dispersed Carbide Powders

In this paper, results of the experimental study on improving wear resistance in sliding friction of Al-based alloy are presented. The technique used involves the formation of a metal matrix composite (MMC) in the alloy surface layer by laser dispersion of carbide powders such as WC, TiC and SiC. Fo...

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Bibliographic Details
Published in:Materials 2020-08, Vol.13 (17), p.3683
Main Authors: Jendrzejewski, Rafał, Łubiński, Jacek, Śliwiński, Gerard
Format: Article
Language:English
Subjects:
Additive manufacturing
Aluminum base alloys
Coatings
Crack propagation
Flux density
Friction resistance
Heating
Intermetallic compounds
Lasers
Light
Lubricants & lubrication
Metal matrix composites
Repair & maintenance
Sliding friction
Solid state lasers
Substrates
Surface layers
Titanium alloys
Titanium carbide
Tribology
Tungsten carbide
Wear resistance
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Summary:In this paper, results of the experimental study on improving wear resistance in sliding friction of Al-based alloy are presented. The technique used involves the formation of a metal matrix composite (MMC) in the alloy surface layer by laser dispersion of carbide powders such as WC, TiC and SiC. For WC and TiC MMC surface coatings fabricated under conditions typical for most of the technologically relevant solid-state lasers (wavelength range of 0.8–1.1 μm), the nearly inversely proportional dependence of the required laser energy density on the powder mass density is observed. Highly homogenous distribution of powder particle content (up to 40%) in the MMC surface coatings of a thickness between 0.8 and 1.6 mm obtained by multiple scanning is observed in the cross-section of specimens processed within a rather narrow parameter window. Tribological tests and comparison to untreated material reveal wear resistance increases by five- and ten-fold, observed in samples with laser-dispersed TiC and WC powders, respectively. Results indicate that substantial modification and reinforcement of the surface layer can be achieved in Al alloy in a one-step process without substrate preheating.
ISSN:1996-1944
1996-1944
DOI:10.3390/ma13173683