On Residual Stresses Development During Nitriding of Steel: Thermochemical and Time Dependence
Article dans une revue avec comité de lecture
Author
BARRALLIER, Laurent JÉGOU, Sébastien KUBLER, RegisAbstract
This work deals with the development of residual stresses during nitriding of steels. The main features of a chemico-thermo-mechanical model of nitriding are presented. A micro-macro approach is applied based on volume change computation in agreements with thermochemical modifications. Results are correlated with the characterization of a ternary Fe-C-3w.%Cr alloy nitrided at 550°C for various time. Residual stress-depth analyses are carried out by X-rays diffraction. Residual stress generation is deeply dependant on chemical and thermodynamical evolutions during the treatment, taking advantage on microstructural effects.
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