Two-phase thermo-mechanical and macrosegregation modelling of binary alloys solidification with emphasis on the secondary cooling stage of steel slab continuous casting processes

As an approach towards a better modelling of solidification problems, we introduce a thermo‐mechanical and macrosegregation model that considers a solidifying alloy as a binary mixture made of a liquid and a solid phase. Macroscopic conservation laws for mass, momentum and solute are obtained by spa...

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Bibliographic Details
Published in:International journal for numerical methods in engineering 2006-09, Vol.67 (10), p.1341-1384
Main Authors: Fachinotti, Victor D., Le Corre, Steven, Triolet, Nicolas, Bobadilla, Manuel, Bellet, Michel
Format: Article
Language:English
Subjects:
Applied sciences
Computational techniques
Condensed matter: structure, mechanical and thermal properties
Continuous casting
Cooling
Engineering Sciences
Equations of state, phase equilibria, and phase transitions
Exact sciences and technology
Foundry engineering
Fundamental areas of phenomenology (including applications)
macrosegregation
Materials
Mathematical analysis
Mathematical methods in physics
Mathematical models
Metals. Metallurgy
Modelling
Other casting methods. Solidification
Physics
Production techniques
Slabs
Solid-liquid transitions
Specific phase transitions
Steels
thermo-mechanical
two-phase
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Summary:As an approach towards a better modelling of solidification problems, we introduce a thermo‐mechanical and macrosegregation model that considers a solidifying alloy as a binary mixture made of a liquid and a solid phase. Macroscopic conservation laws for mass, momentum and solute are obtained by spatial averaging of the respective microscopic conservation equations. Assuming local thermal equilibrium, a single equation for the conservation of the mixture energy is then written. A single equation can be obtained for the solute as well by invoking a proper microsegregation rule. The numerical implementation in a two‐dimensional finite element code is then detailed. Lastly, some examples of simulations of academic tests as well as industrial applications for continuous casting of steel slabs are discussed. They particularly enlighten the ability of the formulation to describe the formation of central macrosegregation during the secondary cooling of slab continuous casting processes. Copyright © 2006 John Wiley & Sons, Ltd.
ISSN:0029-5981
1097-0207
DOI:10.1002/nme.1664