FRICTION SURFACING OF AA5083 ON AA7075: INFLUENCE OF PROCESS PARAMETERS ON MECHANICAL PROPERTIES

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Friction Surfacing is a solid-state coating technique with applications in rehabilitating worn parts, hard-facing, or providing corrosion protection. It is suitable for processing aluminium alloys as it does not require the fusion of either the coating or the substrate, relying on a solid-state diffusion bonding mechanism. The present study investigates the deposition of AA5083 on AA7075 using friction surfacing, with a focus on the effect of process parameters, including axial force, rotation, and travel speed. It characterizes the resulting tensile, bending, and microhardness properties. Good aluminium (AA5083) coatings were produced with limited intermetallic formation at the bonding interface. It was observed that low travel and rotation speeds contribute to an increase in coating thickness and width. The characterization results indicate a change in the tensile and hardness properties of the substrate due to the heat-affected zone.

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