Abstract
Atomic ordering is investigated in ternary substitution alloys with hexagonalclose-packed (hcp) structure of DO19(Ti3Al) type. The singularities are studied of the influence of the impurity of the third component C on the Kurnakov temperature and the degree of long-range order in the host atom arrangement. Phase diagrams are constructed for the ternary alloys with different values of the energy parameters and small concentrations of the component C. Changes in the phase diagram are analyzed for the binary alloy A-B upon addition of atoms C. Formulas are obtained to determine the energetic parameters of ternary alloys having a small concentration of one of the components. Computed as an illustration is a section of the phase diagram of the system Ti-Al-Fe and the iron atom distribution is studied over sites of the alloy crystalline lattice.
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Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 3, pp. 70–77, March, 1987.
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Kalyuzhnyi, V.V., Matysina, Z.A. & Milyan, M.I. Atomic ordering in ternary alloys with hcp structure of DO19 type. Soviet Physics Journal 30, 242–248 (1987). https://doi.org/10.1007/BF00897865
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DOI: https://doi.org/10.1007/BF00897865