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Prediction of Solidification Paths for Fe-C-Cr Alloys by a Multiphase Segregation Model Coupled to Thermodynamic Equilibrium Calculations
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2010 (English)In: ISIJ International, ISSN 0915-1559, E-ISSN 1347-5460, Vol. 50, no 12, 1859-1866 p.Article in journal (Refereed) Published
Abstract [en]

A microsegregation model for the solidification of multicomponent alloys is developed It couples the volume-averaged conservation equations for total mass solute mass and energy assuming a uniform temperature The diffusion in the liquid and solid phases the growth kinetics of the solidifying microstructures and the velocity of the solid/liquid and solid/solid phase interfaces are considered in the model Equilibrium between phases is taken into account and computed using dedicated thermodynamic software The thermodynamic properties and their evolutions during solidification are directly retrieved from a database Illustration is provided by the solidification of a Fe-C-Cr alloy The occurrence of the recalescence due to the growth of the microstructure and the progress of solidification are predicted The solidification behavior near to recalescence is evaluated By adjusting the cooling intensity and the solute diffusivities extreme approximations are retrieved The model shows potentials to be coupled with a macrosegregation model for application to the solidification of multicomponent alloys

Place, publisher, year, edition, pages
2010. Vol. 50, no 12, 1859-1866 p.
Keyword [en]
solidification, microsegregation, multicomponent, dendritic structure, modeling
National Category
Metallurgy and Metallic Materials
Identifiers
URN: urn:nbn:se:kth:diva-30538ISI: 000285666400019Scopus ID: 2-s2.0-79952053597OAI: oai:DiVA.org:kth-30538DiVA: diva2:401745
Note
QC 20110303Available from: 2011-03-03 Created: 2011-02-28 Last updated: 2017-12-11Bibliographically approved

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Nakajima, Keiji
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Applied Process Metallurgy
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