抄録
The superplastic deformation behavior of Sn-Bi-Cu, Sn-Bi-Ni, Sn-Bi-Zn, and Sn-Bi-Sb alloys has been investigated. The purpose
of this study is to measure the strain rate sensitivity index m of Sn-Bi binary alloys. Tensile tests were conducted at 25, 40, 60,
and 80℃ under different crosshead speeds to measure the index m. The results showed that the index m increased with both the
concentration of Bi and the test temperature. At 60 and 80℃, the index m of Sn-Bi alloys exceeded 3.0, which is the threshold of
superplastic deformation behavior. The eutectic microstructure of Sn-Bi was found to have a significant effect on the superplastic
deformation in hypoeutectic Sn-Bi alloys.
