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Effect of friction surfacing parameters on the microstructural, mechanical properties, and wear characteristic of Al‑Cu‑Mg alloy coating reinforced by nickel aluminide

Farajollahi Ramezanali, Aval Hamed Jamshidi, Jamaati Roohollah

Archives of Civil and Mechanical Engineering

2022

Vol. 22, no. 2

art. no. e75, 1--18

This research has studied the microstructure, mechanical properties, and tribological properties of AA2024-Al3NiCu composite coating fabricated by friction surfacing. The Al3NiCu intermetallic was created in the aluminum matrix by adding nickel during the stir casting process and then performing the homogenization treatment. The results showed that with increasing the axial feeding rate from 87.5 to 125 mm/min and the rotational speed from 600 to 800 rpm, the coating efficiency grew up to 79%. Moreover, no significant microstructural differences (grain size, precipitate size, and morphology) were observed in different parts of the coating. Applying the coating at a rotational speed of 800 rpm, a traverse speed of 125 mm/min, and an axial feeding rate of 125 mm/min raised the hardness and shear strength of the AA2024 aluminum alloy substrate by 17% and 21%, respectively, while lowering its wear rate by 37%.