Expanded austenite, crystallography and residual stress

Thomas Christiansen, Thomas Strabo Hummelshøj, Marcel A. J. Somers

Research output: Contribution to journalConference articleResearchpeer-review

Abstract

The identity of expanded austenite as developing during low temperature nitriding and/or carburising of austenitic stainless steel has been under debate since the very first observation of this phase. In the present article, recent results obtained with (a) homogeneous samples of various uniform compositions and (b) unravelling of the contributions of stress-depth and composition-depth profiles in expanded austenite layers are summarised and discussed. It is shown through simulation of line profiles that the combined effects of composition gradients, stress gradients and stacking fault gradients can explain the observations in typical X-ray diffractograms.
Original languageEnglish
JournalSurface Engineering
Volume26
Issue number4
Pages (from-to)242-247
ISSN0267-0844
DOIs
Publication statusPublished - 2010
Event22nd International Conference on Surface Modification Technologies - Trollhattan, Sweden
Duration: 22 Sep 200824 Sep 2008
Conference number: 22

Conference

Conference22nd International Conference on Surface Modification Technologies
Number22
CountrySweden
CityTrollhattan
Period22/09/200824/09/2008

Keywords

  • Stainless steel
  • Gaseous carburising
  • Residual stress
  • Gaseous nitriding
  • X-ray diffraction
  • Expanded austenite

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