On Residual Stresses Development During Nitriding of Steel: Thermochemical and Time Dependence
Article dans une revue avec comité de lecture
Auteur
BARRALLIER, Laurent JÉGOU, Sébastien KUBLER, RegisRésumé
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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Article dans une revue avec comité de lecture;BARRALLIER, Laurent; JÉGOU, Sébastien; KUBLER, Regis (Hanser, 2011)
Development and evolution of compressive residual stress during nitriding treatment are studied. A model carbon iron-based alloy Fe-3wt.%Cr-0.35wt.%C was nitrided in gas at 550 °C for different times. Microstructural ...
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Article dans une revue avec comité de lectureBARRALLIER, Laurent; JÉGOU, Sébastien; KUBLER, Regis (Elsevier, 2010)
Phase transformations during nitriding of a ternary carbon iron-based alloy Fe–3%Cr–0.345%C were studied, aiming for a better understanding of residual stresses generation and evolution. The relationship between the ...
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Article dans une revue avec comité de lectureBARRALLIER, Laurent; JÉGOU, Sébastien; KUBLER, Regis (Trans Tech Publications Inc, 2011)
Nitriding is a well-established thermochemical surface treatment of carbon micro-alloyed steels aiming enhancing surface properties such as fatigue, wear and corrosion resistances. The idea is taking benefits from the high ...
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Evolution des contraintes résiduelles dans la couche de diffusion d’un acier modèle Fe-Cr-C nitruré Article dans une revue avec comité de lecture;BARRALLIER, Laurent; JÉGOU, Sébastien; KUBLER, Regis (Pyc Edition, 2011)
Limiter la fatigue et la corrosion des pièces est possible grâce à une nitruration. Des contraintes résiduelles en découlent. Le rôle de la diffusion du carbone sur le développement de ces contraintes a été étudié sur un ...
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Communication avec acte;BARRALLIER, Laurent; JÉGOU, Sébastien; KUBLER, Regis (2009)
Nitriding of steels is an important treatment in duplex hardening methods. This treatment is known in the art but some advances still need to be done in terms of residual stress understanding. Although residual stresses ...