Effects of Si and Mn on machinability and wear resistance of AS91 and AM90 magnesium alloys

Abstract

Abstract-This study investigates the effect of Silicon (Si) and Manganese (Mn) in AS91 (9% Al, 1% Si) and AM90 (9% Al, 0.5% Mn) magnesium alloys that are among important magnesium alloys wear resistance and machinability. Hardness of intermetallic phases found in the microstructure of magnesium alloys was observed to affect wear resistance and machinability. Mg2Si found in the microstructure of AS91 alloy was established to reduce machinability while intermetallic phase increased hardness and wear resistance. It was found that intermetallic phases (Mg17Al12, Mg2Si and Al8Mn5) of AS91 and AM90 magnesium alloys had an impact on cutting forces and machinability and mechanical properties.