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Título:
THEORY OF COLUMNAR AND EQUIAXED GROWTH AND DENDRITE ARM SPACING DURING DIRECTIONAL SOLIDIFICATION OF ALUMINUM BASE ALLOYS
Autor/es:
ALICIA ESTHER ARES; SERGIO FABIÁN GUEIJMAN; CARLOS ENRIQUE SCHVEZOV
Lugar:
Grenoble. Francia
Reunión:
Conferencia; 14th INTERNATIONAL CONFERENCE ON CRYSTAL GROWTH , ICCG14/ICVPE12, INTERNATIONAL CRYSTAL GROWTH.; 2004
Institución organizadora:
Universidad de Grenoble. Unión Internacional de Crecimiento de Cristales
Resumen:
The importance of directional solidification studies has been well recognized since the early systematic scientific investigations carried out to understand the solidification characteristics of alloys. Such studies provide valuable fundamental information about the interface morphology and solute redistribution during solidification. A majority of alloys grow under conditions, which give rise to dendritic interfaces. For this reason, considerable theoretical and experimental attempts have been made to understand the characteristics of dendritic interface growth carried out under controlled solidification conditions. A treatment which can quantitatively explain all the available experimental data and which correctly incorporates all the physics of the problem is not available yet. It is the purpose of this paper to present a theoretical analysis of equiaxed and columnar growth and dendrite arm spacing under different sample solidification conditions. The basic parameters that we shall use throughout this paper are which characterize the given alloy system under study. Subsequently, we shall define dimensionless parameters, which will enable us to formulate our problem such that the results are independent of any specific alloy system. Finally, we shall present the important functional relationships of our study, which discusses the physical interpretation of the results obtained in the present work.