Effect of extrusion process on wear resistance of aluminum alloy AA 2024-T3.

A cold extrusion procedure for a 13 mm solid rod of aluminum alloy AA 2024 T3 was carried out in this study, employing three molds to generate rods of different diameters (12, 11, and 10 mm), and three passes. Before and after the extrusion process, XRD inspection, microstructure, hardness, and wear tests were evaluated. The adhesion wear specification was investigated using the equipment type a pin on disk was utilized to conduct the wear test with various parameters: sliding times of (5-15 min), applied loads of (0.5 to 2 kg) and sliding distances of (8.6, 12.5 and 16.4 cm) under dry conditions. The results reveal that as the number of extrusion passes increases, the strain hardening increases. Also, as the number of passes increases, the wear rate lowers because of an increase in plastic deformations caused by extrusion. X-ray diffraction (XRD) reveals the precipitation phases (AlCu and Al2Cu) that contributed to improving the wear resistance. The results demonstrate that three passes have a higher hardness and wear resistance than the other passes, which impacts wear response. The extrusion procedure aided in decreasing the wear rate. The best wear resistance result was achieved after three extrusion passes. [ABSTRACT FROM AUTHOR]