2010•Light MetalsRequires access
Effects of cerium and antimony on as-cast microstructure and mechanical properties of Mg-3%Al alloy
Guan Shao-kang
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Abstract
The effects of cerium and antimony on as-cast microstructure and mechanical properties of Mg-3%Al alloy were studied.The results showed that adding cerium and antimony could make β-Mg17Al12 phase dispersive distribution,while only Ce added,the ambient mechanical properties of Mg-3%Al-1%Ce alloy were worse than the Mg-3%Al alloy,because of the precipitation of the needle-like Al4Ce phase;however,when the cerium and antimony were added simultaneously,the alloy represented a better plasticity and strength,due to the precipitation of the dispersoid CeSb in the matrix,which inhibited the formation of the needle-like Al4Ce phase.Compared with Mg-3%Al alloy,the ultimate tensile strength Rm of the Mg-3%Al-1%Ce-1%Sb alloy was improved by 7.5% and the elongation rate A was improved by 91%.