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Title

Redistribution of alloying elements during tempering of a nanocrystalline steel

AuthorsGarcía Caballero, Francisca CSIC ORCID ; Miller, M. K.; García Mateo, Carlos CSIC ORCID CVN ; Capdevila, Carlos CSIC ORCID CVN ; Babu, S. S.
KeywordsTempering
Atom-probe field-ion microscopy (AP-FIM)
Bainitic steels
Issue DateJan-2008
PublisherElsevier
CitationActa Materialia 56 188–199 (2008)
AbstractRedistribution of alloying elements during tempering of a novel nanocrystalline steel consisting of a mixture of lower bainitic ferrite and carbon-enriched retained austenite has been analysed by atom probe tomography. Three physical processes, namely redistribution of substitutional solute across the austenite/bainitic ferrite interface before retained austenite decomposition, redistribution of solute across the lower bainite cementite/ferrite interface and the precipitation of transition carbides and cementite, have been observed. Results suggest that retained austenite decomposes during tempering before full equilibrium is reached at the interface. Moreover, cementite precipitates from supersaturated ferrite via a paraequilibrium transformation mechanism.
Publisher version (URL)http://dx.doi.org/10.1016/j.actamat.2007.09.018
URIhttp://hdl.handle.net/10261/34325 doi:10.1016/j.actamat.2007.09.018
DOI10.1016/j.actamat.2007.09.018
ISSN1359-6454
Appears in Collections:(CENIM) Artículos

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