Reference : Relative Influence of Aluminium and Silicon on the Kinetics of Bainite Formation from...
Scientific journals : Article
Engineering, computing & technology : Materials science & engineering
http://hdl.handle.net/2268/101407
Relative Influence of Aluminium and Silicon on the Kinetics of Bainite Formation from Intercritical Austenite
English
Mertens, Anne mailto [Université Catholique de Louvain - UCL > Département des Sciences des Matériaux et des Procédés > Unité IMAP > >]
Jacques, Pascal J. [Université Catholique de Louvain - UCL > Département des Sciences des Matériaux et des Procédés > Unité IMAP > >]
Sietsma, Jilt [Delft University of Technology > Department of Materials Science and Engineering > > >]
Delannay, Francis [Université Catholique de Louvain - UCL > Département des Sciences des Matériaux et des procédés > Unité IMAP > >]
Dec-2008
Steel Research International
Verlag Stahleisen GmbH
79
12
954-959
Yes
International
1611-3683
Dusseldorf
Germany
[en] TRIP steels ; Bainite ; Phase transformation kinetics
[en] Bainite formation from intercritical austenite is of great practical importance for the production of TRIP-assisted steels. Silicon and aluminium play important roles during this transformation by delaying carbide precipitation, thus favouring the carbon enrichment of untransformed austenite, which makes its stabilisation down to room temperature possible. Previous studies have shown a strong dependence of bainite formation kinetics on both chemical composition and transformation temperature. In the present work, the effect of silicon and aluminium contents on bainite formation kinetics is investigated experimentally using dilatometry combined with microscopical observations. The experimental results are analysed by comparison with thermodynamic parameters, such as the activation energy G* for nucleation of bainite and the carbon content CT0 corresponding to the T0-curve. It is shown that the faster transformation kinetics induced by the substitution of silicon by aluminium can be ascribed (i) to a higher driving force for nucleation, (ii) to a higher carbon content CT0 at the T0-curve and (iii) to the precipitation of carbide in austenite in steels with a low Al content.
Stichting FOM (Pays-Bas)
Researchers ; Professionals
http://hdl.handle.net/2268/101407
10.2374/SR08SP068

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