Microstructural stability and creep properties of die casting Mg–4Al–4RE magnesium alloy |
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| Authors: | Tomasz Rzychoń Andrzej Kie?bus Jan Cwajna Jaros?aw Mizera |
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| Affiliation: | 1. Silesian University of Technology, Faculty of Materials Science and Metallurgy, Krasińskiego 8, 40-019 Katowice, Poland;2. Warsaw University of Technology, Wo?oska 141, 02-507 Warsaw, Poland |
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| Abstract: | The AE44 (Mg–4Al–4RE) alloy was prepared by a hot-chamber die casting method. The microstructure, microstructural stability and creep properties at 175 °C were investigated. The microstructure was analyzed by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD) and the Rietveld method. The results show that die cast AE44 magnesium alloy consists of α-Mg, Al11RE3, Al2RE and Al2.12RE0.88 phases. The Al11RE3 phase is thermally stable at 175 °C whereas the metastable Al2.12RE0.88 phase undergoes a transition into the equilibrium Al2RE phase. The alloy investigated is characterized by good creep properties at temperatures of 175 °C and 200 °C. |
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