Modelling partial equilibria during steel solidification

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Abstract

The back diffusion of a solidifying system under local equilibrium conditions can be simulated by using immaterial constraints as set to the (stoichiometric) conservation matrix of the alloy mixture. In a solidifying alloy, complete diffusion between the liquid and solid portions is often found for chemical components with small atoms which dissolve interstitially in the solid state. Carbon in steels is a classical example. The constrained Gibbs energy method appears to be a useful technique to incorporate the necessary restrictions for those components, which are not allowed to diffuse in the solidifying system, while the interstitial components can reach their partial equilibria.
Original languageEnglish
Title of host publicationAdvanced Gibbs Energy Methods for Functional Materials and Processes
Subtitle of host publicationChemSheet 1999-2009
Place of PublicationEspoo
PublisherVTT Technical Research Centre of Finland
Pages59-64
ISBN (Electronic)978-951-38-7331-8
ISBN (Print)978-951-38-7330-1
Publication statusPublished - 2009
MoE publication typeNot Eligible

Publication series

SeriesVTT Tiedotteita - Research Notes
Number2506
ISSN1235-0605

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Hack, K., Pajarre, R., & Koukkari, P. (2009). Modelling partial equilibria during steel solidification. In Advanced Gibbs Energy Methods for Functional Materials and Processes: ChemSheet 1999-2009 (pp. 59-64). VTT Technical Research Centre of Finland. VTT Tiedotteita - Research Notes, No. 2506 http://www.vtt.fi/inf/pdf/tiedotteet/2009/T2506.pdf