Modeling of Young's modulus variations with temperature of Ni and oxidized Ni using a magneto-mechanical approach - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Materials Science and Engineering: A Année : 2015

Modeling of Young's modulus variations with temperature of Ni and oxidized Ni using a magneto-mechanical approach

Résumé

Thin films and coatings are usually used to give functional properties to the surface of the underlying substrate but are never seen as load bearing due to a very low film to substrate thickness ratio. However, this ratio can increase in some specific domains (such as transportation), where the weight reduction is a high stake. This study deals with the influence of the thermally grown oxide (TGO) NiO on the evolution of the elastic modulus of nickel with temperature. For pure nickel, the Young's modulus evolves non-linearly with temperature, from room temperature up to 360°C, corresponding to the Curie temperature of nickel. The amplitude of these variations can be drastically reduced with the presence of the NiO TGO. The purpose of this study is to propose a modeling of these phenomenon using magneto-mechanical approach. A first analytical modeling takes the change of the saturation magnetization, of the initial anhysteretic susceptibility and of the maximal magnetostriction with a relaxation of magneto-crystalline anisotropy concomitant to increasing temperature, into account. The second modeling is a numerical modeling giving the average behavior of a representative volume element. It allows a continuous description of the change with temperature of the Young's modulus and a clear interpretation of the effect of a coating. This gives an insight for future promising applications.
Fichier principal
Vignette du fichier
Hubert_MSEA-D-14-04982_2nd_revision.pdf (1.35 Mo) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)
Loading...

Dates et versions

hal-01530469 , version 1 (31-05-2017)

Identifiants

Citer

Olivier Hubert, Xavier Milhet, Pascal Gadaud, Mathieu Tatat, Pierre-Olivier Renault, et al.. Modeling of Young's modulus variations with temperature of Ni and oxidized Ni using a magneto-mechanical approach. Materials Science and Engineering: A, 2015, 633, pp.76-91. ⟨10.1016/j.msea.2015.03.014⟩. ⟨hal-01530469⟩
210 Consultations
2952 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More