Inorganic Materials: Applied Research

, Volume 7, Issue 2, pp 210–213 | Cite as

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

  • S. V. Rogozhkin
  • O. A. Korchuganova
  • A. A. Aleev
Materials of Power Engineering and Radiation-Resistant Materials


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.


Fe–Cr atom probe tomography phase decomposition 


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Copyright information

© Pleiades Publishing, Ltd. 2016

Authors and Affiliations

  • S. V. Rogozhkin
    • 1
    • 2
  • O. A. Korchuganova
    • 1
    • 2
  • A. A. Aleev
    • 1
    • 2
  1. 1.National Research Nuclear University Moscow Engineering Physics InstituteMoscowRussia
  2. 2.Institute for Theoretical and Experimental PhysicsNational Research Center Kurchatov InstituteMoscowRussia

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