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Experimental investigation and thermodynamic calculation of the Al–Mg–Zn system

On the basis of a critical assessment, experimental investigations by EPMA on ternary Al–Mg–Zn alloys were specifically performed to provide missing data of the ternary solubilities of the Al–Mg and Mg–Zn phases as well as to improve the knowledge of the extensions of the homogeneity ranges of the t...

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Bibliographic Details
Published in:Thermochimica acta 1998-04, Vol.314 (1), p.87-110
Main Authors: Liang, P, Tarfa, T, Robinson, J.A, Wagner, S, Ochin, P, Harmelin, M.G, Seifert, H.J, Lukas, H.L, Aldinger, F
Format: Article
Language:English
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Summary:On the basis of a critical assessment, experimental investigations by EPMA on ternary Al–Mg–Zn alloys were specifically performed to provide missing data of the ternary solubilities of the Al–Mg and Mg–Zn phases as well as to improve the knowledge of the extensions of the homogeneity ranges of the ternary τ- and Φ-phases. A thermodynamic description for the Al–Mg–Zn system was obtained taking into account those experimental data together with constitutional, thermodynamic and crystallographic literature information. The binary intermetallic phases are modelled to have ternary solubilities. The ternary τ-phase is modelled according to its crystal structure with cubic symmetry as (Mg) 26( Mg, Al) 6( Al, Zn, Mg) 48(Al) 1 in the compound-energy-formalism. The Φ-phase is described by the sublattice formula Mg 6( Al, Zn) 5.
ISSN:0040-6031
1872-762X
DOI:10.1016/S0040-6031(97)00458-9