Austenite formation kinetics from multicomponent cementite-ferrite aggregates

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dc.contributor.authorWu, YXen_AU
dc.contributor.authorWang, LYen_AU
dc.contributor.authorSun, WWen_AU
dc.contributor.authorStyles, MJen_AU
dc.contributor.authorStuder, AJen_AU
dc.contributor.authorBréchet, Yen_AU
dc.contributor.authorArlazarov, Aen_AU
dc.contributor.authorHutchinson, CRen_AU
dc.date.accessioned2025-02-13T02:52:16Zen_AU
dc.date.available2025-02-13T02:52:16Zen_AU
dc.date.issued2020-09-01en_AU
dc.date.statistics2025-02-12en_AU
dc.description.abstractMetastable austenite strongly influences the mechanical properties of many advanced high strength steels (AHSS) and its formation kinetics during intercritical annealing strongly depend on the initial microstructure. In this contribution, we have performed detailed kinetic studies of austenite formation from cementite-ferrite aggregate in a range of Fe-C-Mn and Fe-C-Mn-Si/Al alloys via in situ neutron powder diffraction. Depending on the relative contribution of cementite dissolution in respect to migrating interface of austenite/ferrite, the incomplete dissolution of enveloped cementite limited by slow diffusion in austenite could result in austenite plateauing below equilibrium, while fast dissolution of matrix cementite could result in austenite plateau above equilibrium. Both contributions need to be considered and modelled to describe the austenite formation kinetics. © 2020 Published by Elsevier Ltd on behalf of Acta Materialia Inc.en_AU
dc.description.sponsorshipThe authors gratefully acknowledge the support of ArcelorMittal and the Australian Research Council through the Linkage Grant Scheme (LP150100756). YXW and LYW gratefully acknowledges the award of the Australian Government Research Training Program. The authors gratefully acknowledge the support of the ANSTO for providing the powder diffraction facilities used in this work and financial support (Proposal 5329 & 4507), and the help from Mr. Stanley Lee (ANSTO), Dr. Qi Zhang and Dr. Shengchao Yang during the data collection. YXW gratefully acknowledges Prof. Sybrand van der Zwaag (TU delft) for the stimulating discussions during his visit to Monash, Dr. Xiang Gao for collecting the TEM EDS data, Ms. Xiaohan Weng for collecting part of the SEM data and Mr. J. Paul (ArcelorMittal) for collecting part of the dilatometry and metallography data. The authors would also like to express thanks for the use of equipment within the Monash Centre for Electron Microscopy (Mr. Renji Pan is acknowledged for carbon coating), the Monash X-Ray Platform for preliminary lab XRD as well as dilatometry at Deakin University (Dr. Jerome Cornu is acknowledged for the help with dilatometry).en_AU
dc.identifier.citationWu, Y. X., Wang, L. Y., Sun, W. W., Styles, M. J., Studer, A. J., Bréchet, Y., Arlazarov, A., & Hutchinson, C. R. (2020). Austenite formation kinetics from multicomponent cementite-ferrite aggregates. Acta Materialia, 196, 470-487. doi:10.1016/j.actamat.2020.07.001en_AU
dc.identifier.issn1359-6454en_AU
dc.identifier.journaltitleActa Materialiaen_AU
dc.identifier.pagination470-487en_AU
dc.identifier.urihttps://doi.org/10.1016/j.actamat.2020.07.001en_AU
dc.identifier.urihttps://apo.ansto.gov.au/handle/10238/15979en_AU
dc.identifier.volume196en_AU
dc.languageEnglishen_AU
dc.language.isoenen_AU
dc.publisherElsevieren_AU
dc.subjectAusteniteen_AU
dc.subjectKineticsen_AU
dc.subjectFerriteen_AU
dc.subjectIronen_AU
dc.subjectManganeseen_AU
dc.subjectSiliconen_AU
dc.subjectAluminiumen_AU
dc.subjectNeutron diffractionen_AU
dc.subjectEquilibriumen_AU
dc.subjectHigh alloy steelsen_AU
dc.subjectMechanical propertiesen_AU
dc.subjectAnnealingen_AU
dc.titleAustenite formation kinetics from multicomponent cementite-ferrite aggregatesen_AU
dc.typeJournal Articleen_AU
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