Abstract
This study uses the stir casting method to evaluate how reinforcements enhance wear resistance in aluminium-based hybrid metal matrix composites. Zirconia (ZrO₂) and graphite were used to reinforce AA6082. Archimedes' method assessed density and porosity, Vickers hardness tested hardness, and a universal test machine measured tensile strength. Results showed improvements in micro-Vickers hardness, porosity, and tensile strength from 84 VHN, 2.44 %, 132 MPa (AHC5) to 128 VHN, 3.23 %, and 180 MPa (AHC15). Wear properties were tested under varied loads and sliding speeds, revealing that the wear rate decreases with higher speeds but increases with load. ZrO₂ demonstrated superior wear resistance in AHCs, while graphite proved highly effective as a solid lubricant. These findings underscore the effectiveness of specific reinforcements in enhancing wear properties
in metal matrix composites.

Key words
AA6082 alloy, graphite, ZrO₂ particulates, microstructure, hardness, tensile strength, wear behaviour

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