Numerical Simulation of Macrosegregation Formation in a 2.45 ton Steel Ingot Using a Three-Phase Equiaxed Solidification Model
| Autor: | Engang Wang, Olga Budenkova, Yves Fautrelle, Tao Wang, Yves Delannoy |
|---|---|
| Přispěvatelé: | Science et Ingénierie des Matériaux et Procédés (SIMaP), Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Université Grenoble Alpes (UGA), Key Laboratory of Electromagnetic Processing of Materials (Ministry of Education), Northeastern University [Shenyang] |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
lcsh:TN1-997
Equiaxed crystals Work (thermodynamics) Materials science surface cooling intensity Flow (psychology) 0211 other engineering and technologies 02 engineering and technology medicine.disease_cause [SPI.MECA.MEFL]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Fluids mechanics [physics.class-ph] macrosegregation Mold medicine General Materials Science [SPI.GPROC]Engineering Sciences [physics]/Chemical and Process Engineering Composite material Ingot lcsh:Mining engineering. Metallurgy 021102 mining & metallurgy Computer simulation Metals and Alloys 021001 nanoscience & nanotechnology [INFO.INFO-MO]Computer Science [cs]/Modeling and Simulation Three-phase equiaxed grain ingot solidification 0210 nano-technology Layer (electronics) |
| Zdroj: | Metals Metals, MDPI, 2021, 11 (2), pp.262. ⟨10.3390/met11020262⟩ Volume 11 Issue 2 Metals, Vol 11, Iss 262, p 262 (2021) |
| ISSN: | 2075-4701 |
| DOI: | 10.3390/met11020262⟩ |
| Popis: | International audience; In the present work macrosegregation during solidification of a 2.45 ton steel ingot is simulated with a pure equiaxed model, which was tested previously via modeling of a benchmark experiment. While the columnar structure is not taken into account, a packed layer formed over inner walls of the mold at an early stage of solidification reproduces to some extent phenomena generally related to zones of columnar dendrites. Furthermore, it is demonstrated that interaction of free-floating equiaxed grains with ascending convective flow in the bulk liquid results in flow instabilities. This defines the irregular form of the negative segregation zone, the formation of which at the ingot bottom corresponds to experimental observation. Vertical channels reported in experimental measurements are reproduced in simulations. It is confirmed that intensification of ingot cooling may decrease segregation in the ingot. |
| Databáze: | OpenAIRE |
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