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Kinetics of α’-phase nucleation during thermal aging of Fe–22% Cr alloy

  • Materials of Power Engineering and Radiation-Resistant Materials
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Inorganic Materials: Applied Research Aims and scope

Abstract

The initial stage of phase separation of binary Fe–22 at % Cr alloy during thermal aging at 500°C is studied at the atomic-scale level by atom probe tomography. Upon the behavior analysis of pair-correlation function of chromium atoms, long-range correlations typical of spinodal decomposition are observed at short aging times, which disappear 25 h after aging. The analysis of 3D atomic maps shows that Cr-rich regions form at the initial steps of decomposition, where the chromium concentration increases with an increase in the aging time. At the aging time of ~100 h, the chromium concentration in the center of these regions reaches 80 at %, which corresponds to the α' phase.

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Authors and Affiliations

  1. National Research Nuclear University Moscow Engineering Physics Institute, Kashirskoe sh. 31, Moscow, 115409, Russia

    S. V. Rogozhkin, O. A. Korchuganova & A. A. Aleev

  2. Institute for Theoretical and Experimental Physics, National Research Center Kurchatov Institute, ul. B. Cheremushkinskaya 25, Moscow, 117218, Russia

    S. V. Rogozhkin, O. A. Korchuganova & A. A. Aleev

Authors
  1. S. V. Rogozhkin
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  2. O. A. Korchuganova
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  3. A. A. Aleev
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Correspondence to S. V. Rogozhkin.

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Original Russian Text © S.V. Rogozhkin, O.A. Korchuganova, A.A. Aleev, 2015, published in Perspektivnye Materialy, 2015, No. 12, pp. 34–39.

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Rogozhkin, S.V., Korchuganova, O.A. & Aleev, A.A. Kinetics of α’-phase nucleation during thermal aging of Fe–22% Cr alloy. Inorg. Mater. Appl. Res. 7, 210–213 (2016). https://doi.org/10.1134/S2075113316020179

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  • DOI: https://doi.org/10.1134/S2075113316020179

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