Dubos, P.-A., Zaouali, A., Jouan, P.-Y., Richard-Plouet, M., Brien, V., Gloaguen, D. & Girault, B. (2022) Flow stress improvement of a nickel multicrystal by physical vapor thin film deposition to reduce surface effects. Materials Letters: X, 14 100145.
Added by: Richard Baschera (2022-06-09 13:37:51) Last edited by: Richard Baschera (2022-06-09 13:38:52) |
Type de référence: Article DOI: 10.1016/j.mlblux.2022.100145 Numéro d'identification (ISBN etc.): 2590-1508 Clé BibTeX: Dubos2022 Voir tous les détails bibliographiques |
Catégories: PCM Mots-clés: Mechanical properties, Multicrystals, Physical vapor deposition, Work-hardening Créateurs: Brien, Dubos, Girault, Gloaguen, Jouan, Richard-Plouet, Zaouali Collection: Materials Letters: X |
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Liens URLs https://www.scienc ... /S2590150822000254 |
Résumé |
Uniaxial tensile tests were carried out on nickel sheets containing only few grains across the thickness thus presenting a so-called multicrystalline state. Pristine sheets used as reference and substrates covered by a nickel layer deposited by physical vapor deposition (magnetron sputtering) were studied. Results attest that the surface treatment affects the plastic deformation mechanisms by playing the role of a blocking barrier to dislocation movement which leads to a significant improvement of mechanical performances. The surface restructuring of the nickel sheets is efficient to stop dislocation escape through free surfaces and allows a mechanical improvement of the well-known strong mechanical softening of the multicrystals.
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