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Atom Probe Tomography of High-Entropy Alloy AlCoCrFeNi

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Abstract

In this paper, the results of study of the AlCoCrFeNi high-entropy alloy by means of atom probe tomography are presented. Two phases were found, one enriched in Fe and Cr and the other enriched in Ni and Al. Owing to the complex surface morphology and spatial configuration of the phases, they were analyzed by various statistical methods. The Fe–Cr phase has a honeycomb structure that contains Co particles with the characteristic size of ~10 nm. The enrichment of the cell boundaries in Fe and Cr atoms reaches 50 at %. In turn, the Al–Ni phase is enriched in each of these elements up to 30 at % and contains nanoscale precipitates of Fe and Cr atoms. The volume density of these clusters is ~5 × 1022 cm–3.

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Funding

This work was supported by the Russian Foundation for Basic Research, project no. 18-38-00859. The atom probe tomography examinations were performed at the KAMIKS Shared Access Center (http://kamiks.itep.ru/) at the Alikhanov Institute for Theoretical and Experimental Physics, National Research Center “Kurchatov Institute.”

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Authors and Affiliations

  1. Alikhanov Institute for Theoretical and Experimental Physics, National Research Center “Kurchatov Institute”, 117218, Moscow, Russia

    S. V. Rogozhkin, A. S. Shutov, A. A. Khomich, A. A Nikitin, A. A. Lukyanchuk & O. A. Raznitsyn

  2. National Research Nuclear University MEPhI (Moscow Engineering Physics Institute), 115409, Moscow, Russia

    S. V. Rogozhkin & A. A Nikitin

  3. Department of Materials Engineering, Ben Gurion University of the Negev, P.O. Box 653, Beer-Sheva, Israel

    L. Meshi

Authors
  1. S. V. Rogozhkin
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  2. A. S. Shutov
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  3. A. A. Khomich
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  4. A. A Nikitin
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  5. A. A. Lukyanchuk
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  6. O. A. Raznitsyn
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  7. L. Meshi
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Correspondence to A. S. Shutov.

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Translated by N. Semenova

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Rogozhkin, S.V., Shutov, A.S., Khomich, A.A. et al. Atom Probe Tomography of High-Entropy Alloy AlCoCrFeNi. Phys. Atom. Nuclei 83, 1644–1655 (2020). https://doi.org/10.1134/S106377882010021X

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