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A Simple Model for Hardness and Residual Stress Profiles Prediction for Low-Alloy Nitrided Steel, Based on Nitriding-Induced Tempering Effects

Article dans une revue avec comité de lecture
Auteur
THIBAULT, Simon
SIDOROFF, Christine
533554 NTN-SNR ROULEMENTS [Annecy]
ccJÉGOU, Sébastien
211915 Mechanics surfaces and materials processing [MSMP]
BARRALLIER, Laurent
211915 Mechanics surfaces and materials processing [MSMP]
MICHEL, Grégory

URI
http://hdl.handle.net/10985/13855
DOI
10.3139/105.110360
Date
2018
Journal
Journal of heat treatment and materials

Résumé

Nitriding of low-alloy steels is widely used for gears and bear- ings in aerospace industry. Some highly stressed surfaces re- quire high nitrided depth, which involves long time/high tem- perature nitriding treatment. This study focused on identifying process parameter effects on hardness and residual stress pro- files in a large range of nitriding time and temperature. We demonstrate that core and case can be considered as two ma- terials, softening of which can be predicted by two tempering laws. In addition, a basic relationship was derived from the nitriding depth and a pseudo-diffusion coefficient, allowing prediction of the hardness profile. Residual stress results show that the diffusion controlled effect can also be used to predict residual stress profile affected depth. Likewise, the tempering controlled effect can be used to predict surface and maximum values of the residual stress profile.

Fichier(s) constituant cette publication

Nom:
MSMSP_HTM_2018_THIBAULT.docx
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2.053Mo
Format:
Microsoft Word 2007
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  • Laboratoire Mechanics, Surfaces and Materials Processing (MSMP)

Documents liés

Visualiser des documents liés par titre, auteur, créateur et sujet.

  • Evolution of residual stresses during short time nitriding of 33CrMoV12-9 steel grade 
    Article dans une revue avec comité de lecture
    FALLOT, Guillaume; BARRALLIER, Laurent; ccJÉGOU, Sébastien (Trans Tech Publications, 2014)
    The evolution of residual stresses during short time gas nitriding of 33CrMoV12-9 steel grade is studied. It aims understanding the influence of nitriding parameters (temperature T and nitriding potential Kn) on the ...
  • Qualification of the damage induced by friction using X-ray Diffractometry 
    Communication sans acte
    FABRE, Agnès; BARRALLIER, Laurent; ccJÉGOU, Sébastien (2014)
    In a previous study, the capability of X-ray diffraction technique to qualify damage occurring during friction had been proven [1]. The purpose of this study is to complete this research in order to develop a method to ...
  • Influence of strain hardening on gaseous nitriding of steels 
    Communication avec acte
    GUILLOT, Benjamin; BARRALLIER, Laurent; ccJÉGOU, Sébastien (ASM International, 2016)
    Machining is known to introduce plastic straining and residual stress gradients in surface of mechanical parts. If not controlled, the mechanical state of a surface can influence adsorption and diffusion of atoms during ...
  • Crystallography of Stress corrosion cracking of austenitic stainless steel by scanning electron microscope and electron backscatter diffraction 
    Communication avec acte
    MUBARAK, Hazem; VOLOVITCH, Polina; OGLE, Kévin; BARRALLIER, Laurent; ccJÉGOU, Sébastien (2015)
    In this study, Stress Corrosion Cracking (SCC) produced for 304L austenitic stainless steel in different concentrations of chloride containing sulfuric acid solutions was analyzed using both Scanning Electron Microscope ...
  • Fatigue Modelling for Gas Nitriding 
    Article dans une revue avec comité de lecture
    WEIL, Hadrien; ccJÉGOU, Sébastien; BARRALLIER, Laurent; COURLEUX, Alice; BECK, Guillaume (Università di Cassino, 2016)
    The present study aims to develop an algorithm able to predict the fatigue lifetime of nitrided steels. Linear multi-axial fatigue criteria are used to take into account the gradients of mechanical properties provided by ...

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