EL MAY, Mohamed; MAY, Mohamed; SAINTIER, Nicolas; PALIN LUC, Thierry; DEVOS, Olivier; BRUCELLE, Olivier

doi:10.1016/j.corsci.2018.01.034

Métadonnées

Afficher la notice complète

Licence d’utilisation du document

Langue

Article de revue

Ce document a été publié dans

Corrosion Science. 2018, vol. 133, p. 397-405

Elsevier

Résumé en anglais

This paper presents an analytical model for assessing the corrosion fatigue crack initiation life on a martensitic stainless steel X12CrNiMoV12-3 in high cycle fatigue regime (between 105 and 107 cycles). Based on in-situ electrochemical measurements during corrosion fatigue tests in NaCl aqueous solution, the corrosion fatigue crack initiation mechanism was identified. Two main stages were investigated: (i) the fracture of the passive film by slip bands and (ii) the free dissolution of the metal developing fatigue crack initiation from a critical corrosion defect. The depassivation stress threshold corresponds to the median fatigue strength at 107 cycles for fatigue corrosion tests. For an applied stress range less than this threshold, the depassivation phenomenon was not observed at 107 cycles and no crack initiation occurred. The proposed model takes into account the depassivation process induced by the slip bands emergence at the specimen surface and the corrosion rate under cyclic loading. The experimental results are compared to the proposed model taking into account mechanical and electrochemical material parameters.< Réduire

Mots clés en anglais

Modelling

Stainless steel

Corrosion fatigue

Pitting corrosion

Métadonnées

Partager cette publication !

Licence d’utilisation du document

Modelling of corrosion fatigue crack initiation on martensitic stainless steel in high cycle fatigue regime

Langue

Ce document a été publié dans

Résumé en anglais

Mots clés en anglais

URI

DOI

Origine

Unités de recherche