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Studying the Thermal Stability of Cast and Microcrystalline Alloys Al–2.5Mg–Sc–Zr

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Abstract

The work presents the results of studies of the structure and microhardness during annealing of cast and microcrystalline (MC) Al–2.5%Mg–Sc–Zr alloys with a total Sc and Zr content of 0.32%. The Sc content varies from 0.1 to 0.22% with an interval of 0.02%, and the Zr concentration in the alloy changes proportionally. In the initial state, the cast alloys are characterized by a homogeneous coarse-grained macrostructure. MC alloys are obtained by equal-channel angular pressing (ECAP) and have a homogeneous fine-grained structure in the initial state. The temperature of the beginning of recrystallization of MC alloys is determined. The mechanisms and temperature of the beginning of solid-solution decomposition in the cast and MC alloys are determined according to the Johnson–Mehl–Avrami–Kolmogorov model. It is found that the partial replacement of scandium with zirconium leads to a steady increase in the thermal stability of solid solution of Sc and Zr in aluminum.

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Funding

The study was supported by a grant from the Russian Science Foundation (grant no. 18-13-00306).

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Authors and Affiliations

  1. Lobachevsky State University, 603950, Nizhny Novgorod, Russia

    A. V. Nokhrin, I. S. Shadrina, V. N. Chuvil’deev, V. I. Kopylov, A. A. Bobrov & K. V. Likhnitskii

  2. Physical and Technical Institute, National Academy of Sciences of Belarus, 220141, Minsk, Belarus

    V. I. Kopylov

Authors
  1. A. V. Nokhrin
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  2. I. S. Shadrina
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  3. V. N. Chuvil’deev
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  4. V. I. Kopylov
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  5. A. A. Bobrov
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  6. K. V. Likhnitskii
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Correspondence to I. S. Shadrina.

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Nokhrin, A.V., Shadrina, I.S., Chuvil’deev, V.N. et al. Studying the Thermal Stability of Cast and Microcrystalline Alloys Al–2.5Mg–Sc–Zr. J. Surf. Investig. 16, 18–22 (2022). https://doi.org/10.1134/S1027451022010116

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  • DOI: https://doi.org/10.1134/S1027451022010116

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