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On Residual Stresses Development During Nitriding of Steel: Thermochemical and Time Dependence

Article dans une revue avec comité de lecture
Author
BARRALLIER, Laurent
211915 Mechanics surfaces and materials processing [MSMP]
128006 MECASURF [MECASURF]
ccJÉGOU, Sébastien
ccKUBLER, Regis
193010 Mécanique des Surfaces (EA4496) [MECASURF]

URI
http://hdl.handle.net/10985/10865
DOI
10.4028/www.scientific.net/AMR.89-91.256
Date
2010
Journal
Advanced Materials Research

Abstract

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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