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Structural–Phase States of an Al–Fe–Co–Cr–Ni HEA Coating Formed on 5083 Alloy

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Abstract

An Al–Fe–Cr–Co–Ni high-entropy alloy (HEA) coating is deposited on a substrate made of 5083 alloy using the cold metal transfer (CMT) technology (wire-arc additive manufacturing (WAAM) in combination with welding surfacing). The HEA alloy has a nonequiatomic composition. The modern physical materials science methods are used to analyze the structure, phase and elemental compositions, defect substructure of the coating–substrate system. It is shown that he elemental and phase compositions, the defect substructure of the coating are dependent on the distance from the zone of contacting the coating and the substrate. The layer with a thickness to 200 µm adjacent to the contact zone contains includes a second phase at the HEA grain boundaries rich in chromium and iron atoms. The microdiffraction analysis shows that these inclusions are Al8Cr5. It is revealed that nanocrystalline phases Al2O3 and MgAlO with sizes 10–20 nm and a subgrained structure (subgrain size 140–170 nm) form in the zone of mixing the coating and substrate. The structure of the I type is characterized by inhomogeneous distribution of chemical elements in HEA; there are regions of lammelar shape enriched in Cr atoms and the regions of spherical shape enriched Ni, Fe, and Co atoms. Nanosized (NiCo)3, Al4, and Al13Fe4 particles are arranged along the subgrain boundaries of the system. The physical mechanisms of increasing the material hardness in the coating-substrate contact are discussed.

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Funding

This work was supported by the Russian Science Foundaton: project 20-19-00452 (fabrication of the coating/substrate system and study of the defective substructure and elemental composition by electron microscopy); grant 19-19-00183: the study of the phase composition of the coating/substrate contact zone (https://rscf.ru/project/19-19-00183/).

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Authors and Affiliations

  1. Institute of High-Current Electronics, Siberian Branch, Russian Academy of Sciences, 634055, Tomsk, Russia

    Yu. F. Ivanov

  2. Siberian State Industrial University, 654007, Novokuznetsk, Russia

    V. E. Gromov, S. V. Konovalov, M. O. Efimov, Yu. A. Shlyarova & I. A. Panchenko

  3. Polzunov Altay State Technical University, 656038, Barnaul, Russia

    M. D. Starostenkov

Authors
  1. Yu. F. Ivanov
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  2. V. E. Gromov
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  3. S. V. Konovalov
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  4. M. O. Efimov
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  5. Yu. A. Shlyarova
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  6. I. A. Panchenko
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  7. M. D. Starostenkov
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Corresponding authors

Correspondence to Yu. F. Ivanov, V. E. Gromov, S. V. Konovalov, M. O. Efimov, Yu. A. Shlyarova, I. A. Panchenko or M. D. Starostenkov.

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Translated by Yu. Ryzhkov

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Ivanov, Y.F., Gromov, V.E., Konovalov, S.V. et al. Structural–Phase States of an Al–Fe–Co–Cr–Ni HEA Coating Formed on 5083 Alloy. Phys. Solid State 65, 36–42 (2023). https://doi.org/10.1134/S1063783423700063

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  • DOI: https://doi.org/10.1134/S1063783423700063

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