The Influence of Different Manganese-iron Ratios on the Friction and Wear Properties of Al-10Mg2Si Alloy

Abstract

The study investigated the effect of different manganese-to-iron ratios on the friction and wear performance of Al-10Mg₂Si alloy. The results showed that the as-cast α-Al in the Al-10Mg₂Si alloy without manganese and iron phases was relatively coarse, and its eutectic Mg₂Si morphology was mostly in the form of long needles and needle-like flakes. When the manganese-to-iron ratio was 0.5, the manganese-iron phases were polygonal and fine granular. As the manganese-to-iron ratio continued to increase, the morphology of the manganese-iron phases became polygonal and nearly spherical, with particle sizes of about 10-12μm, showing a clear coarsening phenomenon. Under the conditions of a load of 40N, a rotation speed of 200r/min, and a wear time of 30min, the alloy not treated with ultrasonic had the least wear scar volume when the manganese-to-iron ratio was 0.5, which was 2.635mm³, showing the best wear resistance relatively, and the worn surface exhibited abrasive wear accompanied by slight adhesive wear.