Calculation of Phase Diagrams of Systems AlCuZnMg
and AlCuZnMgFeSi

T. K. Akopyan*, V. S. Zolotorevskii**, and A. V. Khvan***

National University of Science and Technology “MISiS”, Leninskii pr. 4, Moscow, 119049 Russia

*e-mail: aktorgom@gmail.com, nemiroffandtor@yandex.ru

**e-mail: zolotor@misis.ru

***e-mail: avkhvan@gmail.com

Abstract—Fragments of phase diagrams Al–Cu–Zn–Mg and Al–Cu–Zn–Mg–Fe–Si–(Mn) in a temperature
range (%) 4–6 Cu, 2–4 Zn, 0.5–2.0 Mg, 1.5–2.0 Fe, and 1.5–5.0 Si are constructed and the composition of the
solid solution for a series of alloys of the Al–Cu–Zn–Mg–Fe–Si–(Mn) system at temperatures near the solidus
is calculated by the results of thermodynamic calculations using the ThermoCalc software package. The ther-
modynamic calculations are verified by electron probe microanalysis. This verification shows the satisfactory
convergence of the calculated and experimental data. It is revealed that, with the ratio of iron and silicon con-
centrations Fe/Si = 0.5 for alloys of the Al–Cu–Zn–Mg–Fe–Si–(Mn) system, it is possible to obtain a maximally
doped solid solution.

Keywords: aluminum alloys, phase diagrams, thermodynamic calculations

DOI: 10.3103/S1067821213040020

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