Accéder directement au contenu Accéder directement à la navigation
Article dans une revue

Rupture of alumina coatings on C35 steel: A numerical simulation

Réda Berkouch 1 Raphaëlle Bernardie 1 Stéphane Valette 1 Pierre Lefort 1 Joseph Absi 1 
1 IRCER-AXE2 - IRCER - Axe 2 : procédés plasmas et lasers
IRCER - Institut de Recherche sur les CERamiques : AXE2
Abstract : The knowledge of the rupture mechanism of multilayer systems is necessary for improving the bonding of materials, particularly for the ceramic-to-metal junctions, and especially in the case of the ceramic coatings on metallic substrates. For this purpose, coupling experimental measurements of macroscopic interfacial adhesions with numerical tools of fracture mechanics allow understanding how the stress distribution and the cracking mechanisms are influenced by the local environment. This brings an explanation to the cracks initiation and propagation and to the role of local characteristics of the interfacial zone. The present work illustrates this, in the case of alumina coatings strongly bonded to C35 steel substrates previously pre-oxidized in CO 2 . The experimental tool is based on the “silver print test”. It consists in covering the central part of the samples with a thin layer of silver paint before coating in order to create a defect zone. Concerning the numerical part, the finite element method is used as a powerful tool to describe the mechanical phenomena at the local scale influencing the crack propagation. The obtained numerical results show a good agreement with the experimental observations and they allow a local description of the phenomena influencing the cracking mechanism. Moreover, they lead to a concrete proposition for improving the coatings adherence.
Type de document :
Article dans une revue
Liste complète des métadonnées
Contributeur : BEATRICE DERORY Connectez-vous pour contacter le contributeur
Soumis le : jeudi 8 juillet 2021 - 10:06:20
Dernière modification le : samedi 26 mars 2022 - 04:29:30




Réda Berkouch, Raphaëlle Bernardie, Stéphane Valette, Pierre Lefort, Joseph Absi. Rupture of alumina coatings on C35 steel: A numerical simulation. Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications, SAGE Publications, 2020, 234 (12), pp.1475-1489. ⟨10.1177/1464420720945742⟩. ⟨hal-03281266⟩



Consultations de la notice