Abstract
The microstructure and mechanical property investigations of high-pressure die-cast AME501, AME503 and AME505 experimental alloys were presented. The investigated materials were fabricated on the basis of the AM50 commercial magnesium alloy with 1, 3 and 5 wt% cerium rich misch metal. Analyses of the alloy microstructures were carried out by light microscopy, XRD and scanning electron microscopy. The experimental alloys were mainly composed of α-Mg, Al11RE3 and Al10RE2Mn7 intermetallic phases. Additionally, due to non-equilibrium solidification conditions, small amounts of α+γ divorced eutectic and Al2RE intermetallic phase were revealed. The obtained results also show the significant influence of rare earth elements on the tensile properties. Improved alloy properties along with a rise in rare earth elements mass fraction results from an increase in the Al11RE3 phase volume fraction and suppression of the α+γ eutectic volume fraction in the alloy microstructure.
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