Research on the Mechanical Properties and Segregation Behavior of Pb-Al Alloys

Abstract

In this paper, the effect of Al content on the recrystallization behavior and mechanical properties of Pb-Al alloys were studied. The segregation behavior of Al in Pb-Al alloy was investigated. Moreover, the microstructures and precipitates of the alloys were also studied. The results show that the addition of Al can affect the recrystallization behavior of lead and improve its tensile strength. The recrystallization grains are effectively refined with the addition of 0.05%Al and the tensile strength increases obviously. However, the Al-rich phase grows significantly and its refinement effect is reduced with further increasing the Al content, thus, the tensile strength decreases. The mechanical stirring can effectively decrease the segregation degree of Al in Pb-Al alloys, but the yield of Al reduces. After the mechanical stirring, the sizes of Al phases decrease and theirs distribution is more uniform.