Advertisement

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

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.

Keywords

Fe–Cr atom probe tomography phase decomposition 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    Beskorovainy, N.M., Kalin, B.A., and Chernov, I.I., Konstruktsionnye materialy yadernykh reaktorov (Structural Materials of Nuclear Reactors), Moscow: Energoatomizdat, 1995.Google Scholar
  2. 2.
    Klueh, R.L. and Harries, D.R., High-Chromium Ferritic and Martensitic Steels for Nuclear Applications, ASTM International, 2001.CrossRefGoogle Scholar
  3. 3.
    Rogozhkin, S.V., Nikitin, A.A., Aleev, A.A., Germanov, A.B., and Zaluzhnyi, A.G., Atom probe study of radiation induced precipitates in Eurofer97 ferritic–martensitic steel irradiated in BOR-60 reactor, Inorg. Mater.: Applied Res., 2013, vol. 4, pp. 112–118.CrossRefGoogle Scholar
  4. 4.
    Andersson, J.O. and Sundman, B., Thermodynamic properties of the Cr–Fe system, Calphad, 1987, vol. 11, no. 1, pp. 83–92.CrossRefGoogle Scholar
  5. 5.
    Xiong, W., Hedstrom, P., Selleby, M., Odqvist, J., Thuvander, M., and Chen, Q., An improved thermodynamic modeling of the Fe–Cr system down to zero Kelvin coupled with key experiments, Calphad, 2011, vol. 35, no. 3, pp. 355–366.CrossRefGoogle Scholar
  6. 6.
    Nikolaev, A.L., Specificity of stage III in electron-irradiated Fe–Cr alloys, Philos. Mag., 2007, vol. 87, no. 31, pp. 4847–4874.CrossRefGoogle Scholar
  7. 7.
    Nikolaev, A.L. and Kurennykh, T.E., On the interaction between radiation-induced defects and foreign interstitial atoms in α-iron, J. Nucl. Mater., 2011, vol. 414, no. 3, pp. 374–381.CrossRefGoogle Scholar
  8. 8.
    Suvorov, A.L., Rogozhkin, S.V., Zaluzhnyi, A.G., Aleev, A.A., Bobkov, A.F., Zaitsev, S.V., Karpov, A.V., Kozodaev, M.A., Loginov, B.A., and Makeev, O.N., Atomic-scaled studies of reactor materials, Vopr. At. Nauki Tekh., Ser. Materialoved. Nov. Mater, 2006, no. 1, pp. 3–13.Google Scholar
  9. 9.
    Miller, M.K., Atom Probe Tomography: Analysis at the Atomic Level, Berlin: Springer-Verlag, 2000.CrossRefGoogle Scholar
  10. 10.
    Philippe, T., Duguay, S., and Blavette, D., Clustering and pair correlation function in atom probe tomography, Ultramicroscopy, 2010, vol. 110, no. 7, pp. 862–865.CrossRefGoogle Scholar
  11. 11.
    Miller, M.K., Hyde, J.M., Hetherington, M.G., Cerezeo, A., Smith, G.D.W., and Elliot, C.M., Spinodal decomposition in Fe–Cr alloys: Experimental study at the atomic level and comparison with computer models-1: Introduction and methodology, Acta Metallur. Mater., 1995, vol. 43, no. 9, pp. 3385–3401.CrossRefGoogle Scholar
  12. 12.
    Dubiel, S.M. and Inden, G., Möessbauer-effect determination of the miscibility gap in the Fe–Cr system, Zt. Metallkd., 1987, vol. 78, no. 8, pp. 544–549.Google Scholar

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

Personalised recommendations