Bismuth Effect on the Mechanical Properties of Antifriction Al-Sn Alloys

Al-Sn alloys were produced by the induction melting method with different Bi additions. Microstructure shows grains 130 mu m average size. Fracture toughness and hardness tests have shown that ternary alloying elements present significantly affected the samples with Bi alloying. Plastic deformation was evaluated by using the forging test; the results have shown that the addition of 3.5 at.% Bi increased the value at least twice as compared with unalloyed sample. Wear test indicated that bismuth slightly affected the tribological behavior. It was found that a concentration of 3.0 at.% Bi, considerably enhances the alloys performance.