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Journal of Materials Science

, Volume 43, Issue 15, pp 5358–5367 | Cite as

EXAFS investigation of low temperature nitrided stainless steel

  • Jette Oddershede
  • Thomas L. ChristiansenEmail author
  • Kenny Ståhl
  • Marcel A. J. Somers
Article

Abstract

Low temperature nitrided stainless steel AISI 316 flakes were investigated with EXAFS and X-ray diffraction analysis. The stainless steel flakes were transformed into a mixture of nitrogen expanded austenite and nitride phases. Two treatments were carried out yielding different overall nitrogen contents: (1) nitriding in pure NH3 and (2) nitriding in pure NH3 followed by reduction in H2. The majority of the Cr atoms in the stainless steel after treatment 1 and 2 was associated with a nitrogen–chromium bond distance comparable to that of the chemical compound CrN. The possibility of the occurrence of mixed substitutional–interstitial atom clusters or coherent nitride platelets in nitrogen-expanded austenite is discussed.

Keywords

Austenite Rietveld Refinement Chromium Atom Nitriding Temperature Iron Nitrides 

Notes

Acknowledgement

Financial support of the Danish Research Council for Technology and Production Sciences under grant 274-05-0230 is gratefully acknowledged.

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Copyright information

© Springer Science+Business Media, LLC 2008

Authors and Affiliations

  • Jette Oddershede
    • 1
  • Thomas L. Christiansen
    • 2
    Email author
  • Kenny Ståhl
    • 1
  • Marcel A. J. Somers
    • 2
  1. 1.Department of ChemistryTechnical University of DenmarkKgs. LyngbyDenmark
  2. 2.Department of Mechanical EngineeringTechnical University of DenmarkKgs. LyngbyDenmark

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