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Compositional characterisation and thermodynamic modelling of nitride precipitates in a 12% Cr steel

  • Mihaela Albu , Francisca Méndez Martín , Gerald Kothleitner and Bernhard Sonderegger
Published/Copyright: June 11, 2013
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International Journal of Materials Research
From the journal International Journal of Materials Research Volume 99 Issue 4

Abstract

In 9–12% Cr steels, nitrides (MX, M2X) and modified Z-phase ((Cr, V, Nb, Fe)N)) are of special interest because of their different contribution to the creep strength of the material. The changes in the chemical composition of complex nitrides and their crystallography were investigated using transmission electron microscopy. A method based on multiple linear least squares fit procedures was applied to extract the complete element content of the nitrides from the electron energy loss spectra. These results, augmented by X-ray spectroscopic data, were compared with the outcomes of the thermodynamic model implemented in the software package MatCalc. The elemental concentrations of precipitates under study i. e. the M2X, MX and modified Z-phase are in good agreement with simulations.

Keywords: Nitride precipitates; Chromium steels; EELS; Quantification; Thermodynamic modelling
* Correspondence address, Dipl.-Ing. Dr. techn. Mihaela Albu, Institute for Electron Microscopy, Graz University of Technology, Steyrergasse 17, A-8010 Graz, Tel.: +43 316 873 8348, Fax: +43 316 811 596, E-mail:

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Received: 2007-10-10
Accepted: 2008-1-30
Published Online: 2013-06-11
Published in Print: 2008-04-01

© 2008, Carl Hanser Verlag, München

Articles in the same Issue

  1. Contents
  2. Contents
  3. Editorial
  4. Horst Cerjak – Emeritus Professor
  5. Review
  6. Calculation of crystallographic texture due to displacive transformations
  7. Basic
  8. Ferrite transformation from oxide–steel interface in HAZ-simulated C–Mn steel
  9. Influence of metastable tetragonal ZrO2-reinforcements on the properties of MoSi2-composites
  10. Joining strategies for open-porous metallic foams
  11. Precipitation behaviour of an Fe–Co–Mo-alloy during non-isothermal ageing
  12. Characterization of δ-phase in superalloy Allvac 718PlusTM
  13. Direct observation of phase transformations in the simulated heat-affected zone of a 9Cr martensitic steel
  14. Effect of boron on creep deformation behavior and microstructure evolution in 9% Cr steel at 650°C
  15. Effect of stress on the creep deformation of ASME Grade P92/T92 steels
  16. Applied
  17. Assessment of creep rupture life of weldments of martensitic steels
  18. Computational analysis of the precipitation kinetics in a complex tool steel
  19. Predicted precipitate back-stress and creep rupture strength of the advanced 9–12% Cr steel COST E2
  20. Compositional characterisation and thermodynamic modelling of nitride precipitates in a 12% Cr steel
  21. The L2 norm of the deviation between the measured and computed transient displacement field in a test weld
  22. Toward reliable calculations of heat and plastic flow during friction stir welding of Ti-6Al-4V alloy
  23. Notifications
  24. DGM News
https://doi.org/10.3139/146.101644
Keywords for this article
Nitride precipitates; Chromium steels; EELS; Quantification; Thermodynamic modelling

Articles in the same Issue

  1. Contents
  2. Contents
  3. Editorial
  4. Horst Cerjak – Emeritus Professor
  5. Review
  6. Calculation of crystallographic texture due to displacive transformations
  7. Basic
  8. Ferrite transformation from oxide–steel interface in HAZ-simulated C–Mn steel
  9. Influence of metastable tetragonal ZrO2-reinforcements on the properties of MoSi2-composites
  10. Joining strategies for open-porous metallic foams
  11. Precipitation behaviour of an Fe–Co–Mo-alloy during non-isothermal ageing
  12. Characterization of δ-phase in superalloy Allvac 718PlusTM
  13. Direct observation of phase transformations in the simulated heat-affected zone of a 9Cr martensitic steel
  14. Effect of boron on creep deformation behavior and microstructure evolution in 9% Cr steel at 650°C
  15. Effect of stress on the creep deformation of ASME Grade P92/T92 steels
  16. Applied
  17. Assessment of creep rupture life of weldments of martensitic steels
  18. Computational analysis of the precipitation kinetics in a complex tool steel
  19. Predicted precipitate back-stress and creep rupture strength of the advanced 9–12% Cr steel COST E2
  20. Compositional characterisation and thermodynamic modelling of nitride precipitates in a 12% Cr steel
  21. The L2 norm of the deviation between the measured and computed transient displacement field in a test weld
  22. Toward reliable calculations of heat and plastic flow during friction stir welding of Ti-6Al-4V alloy
  23. Notifications
  24. DGM News
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