Isothermal section of the Mg–Al–Mn ternary system at 400 °C

• Published in: Journal of alloys and compounds Vol. 479; no. 1; pp. 237 - 241
• Main Authors: Ren, Y.P., Qin, G.W., Pei, W.L., Zhao, H.D., Guo, Y., Li, H.X., Jiang, M., Hao, S.M.
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier B.V 01-06-2009; Elsevier
• Subjects: Cross-disciplinary physics: materials science; rheology; Exact sciences and technology; Isothermal section; Materials science; Mg–Al–Mn system; Phase diagrams and microstructures developed by solidification and solid-solid phase transformations; Phase diagrams of metals and alloys; Phase equilibrium; Physics; Solubility; Mg–Al–Mn system; Isothermal section; Phase equilibrium; Solubility; Scanning electron microscopy; Phase diagrams; Mg-Al-Mn system; Ternary systems; Aluminium; XRD; Lattice parameters; Diffusion pair; Zinc; Electron microprobe analysis; Solid solutions; Transition elements; Phase equilibria; Magnesium
• ISSN: 0925-8388; 1873-4669
• DOI: 10.1016/j.jallcom.2009.01.008

In this work, the equilibrium phase constituents and compositions in the Mg–Al–Mn ternary system at 400
°C were determined through equilibrated alloy method and diffusion couple technique by using scanning electron microscopy (SEM), X-ray diffraction (XRD) and electron probe micro-analyzer (EPMA). The isothermal section in the Mg-rich corner at 400
°C was thus constructed. No ternary compounds were detected in the Mg-rich corner. Therefore, there exist the equilibrium relationships between the α-Mg solid solution and Mg
17Al
12 compound or the other Al–Mn compound phases. The solubility of Mn in the phases α-Mg and Mg
17Al
12 is almost negligible, while the element Mg can slightly dissolve in the compound Al
11Mn
4. The lattice parameter dependence of α-Mg solid solution on Al content in Mg–Al–Mn system was finally determined by the XRD results.