Thermal and tensile properties of Bi-Ag alloys

This study investigated the microstructure and properties of Bi-Ag alloys, a novel Pb-free solder for high-temperature applications. The results show that Bi-Ag alloys exhibited a nonequilibrium solidification feature and a considerably large undercooling. An increase in the Ag content effectively raised the tensile strength. However, the elongation in a decreasing order was hypereutectic Bi-11Ag, pure Bi, and then eutectic Bi-2.5Ag. The fracture mode was significantly affected by microstructural characteristics and the strain rate.