Article ID Journal Published Year Pages File Type
1638181 Transactions of Nonferrous Metals Society of China 2011 6 Pages PDF
Abstract

The effects of Bi addition on the microstructures and mechanical properties of as-cast AZ80 alloy were investigated. The results show that with the addition of Bi, the coarse eutectic phases are refined and become discontinuous; some flaky and granular Mg3Bi2 phases with a hexagonal structure of D52 are observed along the grain boundaries and between dendrites. The tensile strength and elongation increase first, and then decrease with increasing Bi content. AZ80-0.5%Bi alloy has optimum combination mechanical properties. When the content of Bi is above 1.0% (mass fraction), the amount of flaky Mg3Bi2 phase increases markedly, which splits the matrix and deteriorates the tensile strength and elongation.

Related Topics
Physical Sciences and Engineering Materials Science Metals and Alloys