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Couturier, L., De Geuser, F. & Deschamps, A. (2020) Microstructural evolution during long time aging of 15-5PH stainless steel. Materialia, 9 100634.
Added by: Richard Baschera (2020-06-19 13:12:38) Last edited by: Richard Baschera (2020-06-19 13:52:42) |
| Type de référence: Article DOI: 10.1016/j.mtla.2020.100634 Numéro d'identification (ISBN etc.): 2589-1529 Clé BibTeX: Couturier2020 Voir tous les détails bibliographiques  |
Catégories: ID2M Mots-clés: Aging, Atom probe tomography, kinetics, Small angle scattering, stainless steel Créateurs: Couturier, De Geuser, Deschamps Collection: Materialia |
Consultations : 1/441
Indice de consultation : 6% Indice de popularité : 1.5% |
| Liens URLs http://www.science ... /S258915292030051X |
| Résumé |
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When subjected to long-term aging at intermediate temperatures, the 15–5PH precipitation hardening martensitic stainless steel is subject to a complex evolution of its microstructure that impacts its service mechanical properties. This evolution includes possible evolution of minor austenite phase, of the copper-rich precipitates, as well as unmixing of the chromium solid solution and formation of silicon-rich precipitates. In this work, a systematic quantification of all these evolutions as a function of aging temperature and time is obtained by combining advanced characterization tools, notably phase and orientation mapping in the transmission electron microscope, atom probe tomography, and small angle X-ray and neutron scattering. Results show a remarkable stability of austenite and Cu precipitation, and evidence the kinetics of Cr unmixing and Si-rich phase formation. We propose a phenomenological model for the Cr composition fluctuations’ amplitude and characteristic length increase with aging and put it in relation to hardness’ evolution.
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