TRIBOLOGICAL PERFORMANCE OF IN-SITU Al–Mg₂Si METAL MATRIX COMPOSITES UNDER DRY SLIDING CONDITIONS
Suresh K.1, Gangadhar Medleri2, Shubha T. C.1
1Department of Mechanical Engineering, Government Engineering College, Talakal, Koppal (Affiliated to Visvesvaraya Technological University, Belagavi), India
2Supinco Automation PVT LTD, Bengaluru, India
Abstract: The dry sliding wear behavior of in-situ Al–Mg₂Si metal matrix composites was investigated at a sliding velocity of 2 m/s using a pin-on-disc configuration. Wear tests were conducted under varying normal loads using pins of 8 mm and 10 mm diameter. Wear rate, specific wear rate, coefficient of friction, frictional force, and dimensionless wear coefficient were evaluated to understand the influence of load and pin geometry at higher sliding speed. The results show that wear rate increases with increasing load, while specific wear rate remains nearly constant, indicating a stable wear mechanism consistent with Archard’s law. The coefficient of friction exhibits marginal variation with load, suggesting steady-state sliding conditions. A comparative assessment reveals that the 10 mm diameter pins exhibit improved wear resistance and lower wear coefficients due to reduced contact stress. The findings confirm that applied load remains the dominant factor governing wear behavior even at higher sliding velocity, highlighting the suitability of Al–Mg₂Si composites for high-speed tribological applications.
Keywords: Al–Mg₂Si composites; dry sliding wear; sliding velocity; coefficient of friction; Archard’s law
VOLUME 10 ISSUE 01 2026: 177 – 189