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Title

Influence of V Precipitates on Acicular Ferrite Transformation. Part 1: The Role of Nitrogen

AuthorsGarcía Mateo, Carlos CSIC ORCID CVN ; Capdevila, Carlos CSIC ORCID CVN ; García Caballero, Francisca CSIC ORCID ; García de Andrés, Carlos
KeywordsAcicular ferrite
Bainite
V(C, N)
Continuous cooling transformation diagrams
Issue DateSep-2008
PublisherIron and Steel Institute of Japan
CitationISIJ International 48(9): 1270-1275 (2008)
AbstractThis paper (part 1 of a two part study) deals with the influence of N in its combination with V, as V(C, N) precipitates, on the decomposition of austenite into acicular ferrite. Likewise, the intragranular nucleation potency of V(C, N) precipitates is analyzed through the continuous cooling transformation diagrams (CCT) of two C–Mn–V steels with different contents of N under two different austenitising temperatures, i.e. different austenite grain sizes. The results clearly show that for austenite to decompose into acicular ferrite is necessary, first to have a representative fraction of V(C, N) precipitates within austenite, and second to decorate the austenite grain boundaries with proeutectoid ferrite so bainite can not form. Part 2 of the study concerns with the influence that those precipitates have on the kinetics of acicular ferrite formation during austenite isothermal decomposition.
Description6 pages, 8 figures, 1 table.-- This is Part I of paper "Influence of V Precipitates on Acicular Ferrite Transformation", Part II available at: http://hdl.handle.net/10261/17758
Vanadium Award 2009-Council of the Institute of Materials, Minerals and Mining-UK for the most outstanding paper in the metallurgy and technology of vanadium and its alloys. Sponsored and selected by the Vanadium International Technical Committee (Vanitec).
Publisher version (URL)http://dx.doi.org/10.2355/isijinternational.48.1270
URIhttp://hdl.handle.net/10261/17759
DOI10.2355/isijinternational.48.1270
ISSN0915-1559
E-ISSN1347-5460
Appears in Collections:(CENIM) Artículos




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