Physicochemical mechanics of structural transformations in nitrided steel

Traskine, V.; Bochenkov, S. E.; Скворцова, З. Н.; Barrallier, Laurent

doi:10.1007/s10595-005-0061-0

Cited by 3 publications

(1 citation statement)

References 19 publications

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“…Diffusion of the released carbon is usually reported during nitriding, with decarburization of the close surface and carbon enrichment at the nitrogen diffusion front [15,22]. Carbon generally drives cementite precipitation at grain boundaries parallel to the nitrided surface through the diffusion layer [22,23]. However, any metallurgical relations between these observations and residual stress evolution have not been totally exploited, limiting understanding to a complex interaction between nitrogen and carbon atoms and the correlation of experimental observations between the decarburization of the surface with the decreasing residual stress at the beginning of the diffusion layer [7,18].…”

Section: Introductionmentioning

confidence: 99%

Phase transformations and induced volume changes in a nitrided ternary Fe–3%Cr–0.345%C alloy

2010

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is an open access repository that collects the work of Arts et Métiers ParisTech researchers and makes it freely available over the web where possible. AbstractPhase 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 precipitation of Cr 7 C 3 carbides and CrN nitrides, the induced volume change and the mechanical properties were investigated at three distinct depths of the diffusion zone. The relaxation of residual stresses arose through phase transformations according to the diffusion of nitrogen but also of carbon.

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Section: Introductionmentioning

confidence: 99%

Phase transformations and induced volume changes in a nitrided ternary Fe–3%Cr–0.345%C alloy

2010

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Multiscale analysis of an ODS FeAl40 intermetallic after plasma-assisted nitriding

Martin

Martinavičius

Bruyère

et al. 2016

Journal of Alloys and Compounds

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S91 Phase Transformation Involving Residual Stresses During Gaseous Nitriding of Steel

et al. 2008

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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 they originate from volume micro-loading accompanying the precipitation of nitrides, questions about their in-depth distribution of a nitrided layer during the treatment are still a challenge. A chemico-thermo-micromechanical model has been developed on the volume change computation of secondary phase transformation. Supported by some experimental observations (TEM, X-ray analysis, Electron Probe Micro Analysis (EPMA), ...), this model gives some better understanding about nitriding. Residual stresses are mainly due to the precipitation of semi-coherent MN nitrides (M=Cr,V,Mo,.. .). Moreover carbon, often not enough considered in the literature, is of importance in the treatment as it involves a second kind of precipitation that is the transformation of carbides M 23 C 6 and M 7 C 3 into incoherent nitrides. The volume change of this transformation is a critical entry data of the mechanical modelling.

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Physicochemical mechanics of structural transformations in nitrided steel

Cited by 3 publications

References 19 publications

Phase transformations and induced volume changes in a nitrided ternary Fe–3%Cr–0.345%C alloy

Phase transformations and induced volume changes in a nitrided ternary Fe–3%Cr–0.345%C alloy

Multiscale analysis of an ODS FeAl40 intermetallic after plasma-assisted nitriding

S91 Phase Transformation Involving Residual Stresses During Gaseous Nitriding of Steel

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