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Internal stresses and carbon enrichment in austenite of Quenching and Partitioning steels from high energy X-ray diffraction experiments

hal.structure.identifierInstitut Jean Lamour [IJL]
dc.contributor.authorALLAIN, Sébastien Yves Pierre
hal.structure.identifierInstitut Jean Lamour [IJL]
dc.contributor.authorGAUDEZ, Steve
hal.structure.identifierInstitut Jean Lamour [IJL]
dc.contributor.authorGEANDIER, Guillaume
hal.structure.identifierArcelorMittal Maizières Research SA
dc.contributor.authorHELL, Jean-Christophe
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorGOUNÉ, Mohamed
hal.structure.identifierGroupe de physique des matériaux [GPM]
dc.contributor.authorDANOIX, Fréderic
hal.structure.identifierArcelorMittal Maizières Research SA
dc.contributor.authorSOLER, Michel
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorAOUED, Samy
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorPOULON-QUINTIN, Angeline
dc.date.issued2018-01
dc.identifier.issn0921-5093
dc.description.abstractEnQuenching and Partitioning (Q&P) process permits to produce innovative microstructures containing large fraction of carbon enriched retained austenite. The present study highlights that austenite undergoes significant internal stresses generated during such thermal cycle. Both mechanical and chemical contributions are likely to affect its stability at room temperature and thus the resulting mechanical properties of the steel. The experiments carried out by High Energy X-Ray Diffraction (HEXRD) show unambiguously that internal stresses in austenite originate from martensitic transformation strain and from additional hydrostatic stresses induced during both reheating to partitioning temperature and final cooling. These eigenstrains are attributed to the difference in Coefficients of Thermal Expansion (CTE) between martensite and austenite and are predicted successfully with a purely elastic mean field approach. In the present study, retained austenite is shown to be in compression at room temperature. As a consequence, this state of stress contributes to stabilize retained austenite against a possible strain induced transformation at room temperature and affects the way to determine the carbon content in austenite.
dc.description.sponsorshipPartition du carbone dans les phases ferritiques nanostructurées: cinétiques et microstructures - ANR-14-CE07-0029
dc.description.sponsorshipDesign des Alliages Métalliques pour Allègement des Structures - ANR-11-LABX-0008
dc.language.isoen
dc.publisherElsevier
dc.subject.enSteels
dc.subject.enQ&P
dc.subject.enSynchrotron
dc.subject.enInternal stresses
dc.subject.enAustenite
dc.subject.enMartensite
dc.title.enInternal stresses and carbon enrichment in austenite of Quenching and Partitioning steels from high energy X-ray diffraction experiments
dc.typeArticle de revue
dc.identifier.doi10.1016/j.msea.2017.10.105
dc.subject.halChimie/Matériaux
bordeaux.journalMaterials Science and Engineering: A
bordeaux.page245-250
bordeaux.volume710
bordeaux.peerReviewedoui
hal.identifierhal-01667935
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-01667935v1
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