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Tancret, F., Laigo, J. & Furtado, J. (2019) Creep resistance of Fe-Ni-Cr heat resistant alloys for reformer tube applications. Materials Science and Technology,
Added by: Richard Baschera (2019-09-30 09:09:02) Last edited by: Richard Baschera (2019-09-30 09:16:41) |
| Type de référence: Article DOI: 10.1080/02670836.2019.1648371 Clé BibTeX: Tancret2019 Voir tous les détails bibliographiques  |
Catégories: ID2M Créateurs: Furtado, Laigo, Tancret Collection: Materials Science and Technology |
Consultations : 1/419
Indice de consultation : 5% Indice de popularité : 1.25% |
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Relations between microstructure, phase transformations and creep resistance of austenitic Fe-Ni-Cr alloys are investigated. As-cast alloys with different silicon contents and an ex-service tube are submitted to laboratory agings to trigger specific phase transformations, and subsequently creep-tested at 950 degrees C under stresses of 24-48 MPa. As-cast microstructures contain interdendritic chromium-rich M7C3 carbides with niobium-rich MC carbides. After aging at 950 degrees C, primary M7C3 carbides transform into chromium-rich M23C6 carbides, associated to a loss in creep strength. The G phase present in the ex-service alloy is reversed into MC carbides by a heat treatment at 1100 degrees C, associated to a slight decrease in creep resistance. Besides, the addition of silicon is highly detrimental to creep strength. Results can be used for alloy design.
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