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Modeling Of Solute Redistribution In The Mushy Zone During Solidification Of Aluminum-copper Alloys

Q. Diao, H. Tsai
Published 1993 · Materials Science

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A mathematical model has been established to predict the formation of macrosegregation for a unidirectional solidification of aluminum-copper alloys cooled from the bottom. The model, based on the continuum formulation, allows the calculation of transient distributions of temperature, velocity, and species in the solidifying alloy caused by thermosolutal convection and shrinkage-induced fluid flow. Positive segregation in the casting near the bottom (inverse segregation) is found, which is accompanied by a moving negative-segregated mushy zone. The effects of shrinkage-induced fluid flow and solute diffusion on the formation of macrosegregation are examined. It is found that the redistribution of solute in the solidifying alloy is caused by the flow of solute-rich liquid in the mushy zone due to solidification shrinkage. A higher heat-extraction rate at the bottom increases the solidification rate, decreasing the size of the mushy zone, reducing the flow of solute-rich liquid in the mushy zone and, as a result, lessening the severity of inverse segregation. Comparisons between the theoretical predictions from the present study and previous modeling results and available experimental data are made, and good agreements are obtained.
This paper references
10.2355/TETSUTOHAGANE1955.73.14_1698
Computer Simulation of Macrosegregation in Ingots
I. Ohnaka (1987)
10.1016/0017-9310(87)90094-9
A continuum model for momentum, heat and species transport in binary solid-liquid phase change systems—I. Model formulation
W. D. Bennon (1987)
10.1177/001452469000101110
"J."
G.G. Stokes (1890)
10.1016/0017-9310(92)90147-K
Interaction between shrinkage-induced fluid flow and natural convection during alloy solidification
K. C. Chiang (1992)
10.1016/0017-9310(92)90146-J
Shrinkage-induced fluid flow and domain change in two-dimensional alloy solidification
K. C. Chiang (1992)
lnt
D. G. Neilson (1991)
10.1007/978-981-13-1903-7
Numerical heat transfer and fluid flow
S. Patankar (1980)
10.1007/BF02814231
Inverse segregation in directionally solidified Al-Cu-Ti alloys with equiaxed grains
H. Kato (1985)
10.1016/0017-9310(91)90148-8
Unidirectional solidification of a binary alloy and the effects of induced fluid motion
D. Neilson (1991)
and M
I. Ohnak (1987)
Metall
K. Kubo (1985)
10.1115/1.3564760
Non-Darcy Flow Through Fibrous Porous Media
G. S. Beavers (1969)
10.2355/ISIJINTERNATIONAL1966.26.781
Flow analysis during solidification by the direct finite difference method.
I. Ohnaka (1986)
Summary of thermal properties for casting alloys and mold materials
R. D. Pehlke (1982)
Metall
H. Kato (1985)
10.1007/BF02679728
Mathematical modeling of porosity formation in solidification
K. Kubo (1985)
Int
W. D. Bennon (1987)
10.1016/0017-9310(87)90095-0
A continuum model for momentum, heat and species transport in binary solid-liquid phase change systems. II: Application to solidification in a rectangular cavity
W. D. Bennon (1987)
Int
K. C. Chiang (1992)
Solidification Processing, McGraw-Hill, Inc
M. C. Flemings (1974)
PCH, PhysicoChem
C. Beckermann (1988)



This paper is referenced by
10.1016/0017-9310(94)00221-G
A model of inverse segregation: the role of microporosity
V. Voller (1995)
10.1080/13640461.2001.11819428
A study of solidification with a rotating magnetic field
Jayant K. Roplekar (1999)
10.1016/0956-716X(94)90001-9
Primary silicon segregation during isothermal holding of hypereutectic Al-18.3 wt%Si alloy in the freezing range
D. Liang (1994)
10.1115/1.4027673
Modeling of Cold Metal Transfer Spot Welding of AA6061-T6 Aluminum Alloy and Galvanized Mild Steel
Z. Rao (2014)
10.1016/J.MATCHEMPHYS.2008.11.037
Inverse segregation during transient directional solidification of an Al–Sn alloy: Numerical and experimental analysis
K. S. Cruz (2009)
10.1007/S11661-001-0181-Z
Modeling of microstructural evolution with tracking of equiaxed grain movement for multicomponent Al-Si alloy
Bing Yang (2001)
10.1016/J.MATDES.2016.09.022
Investigation of molten pool behavior and weld bead formation in VP-GTAW by numerical modelling
J. Pan (2016)
10.2514/6.2006-3584
Effects of Welding Current in Gas Metal Arc Welding
J. Hu (2006)
Development of a high-energy X-ray compound tomography sensor for detecting the solidification front position in aluminum casting
M. M. Hytros (1999)
10.1007/BF02654109
Mathematical modeling of macrosegregation of iron carbon binary alloy: Role of double diffusive convection
A. Singh (1995)
10.1007/S11661-998-0143-9
Numerical simulation of macrosegregation: a comparison between finite volume method and finite element method predictions and a confrontation with experiments
N. Ahmad (1998)
10.1016/S0008-4433(97)00032-3
A numerical scheme for solidification of an alloy
V. Voller (1998)
10.1016/J.APM.2017.10.012
An asymptotic approach to solidification shrinkage-induced macrosegregation in the continuous casting of binary alloys
M. Vynnycky (2018)
10.1016/S0008-4433(97)00040-2
Modeling of Casting Solidification Stochastic or Deterministic
D. Stefanescu (1998)
10.1063/1.3291121
Effects of shielding gas compositions on arc plasma and metal transfer in gas metal arc welding
Z. Rao (2010)
10.1115/IMECE2006-15617
Effects of Welding Current on Metal Transfer and Weld Pool Dynamics in Gas Metal Arc Welding
J. Hu (2006)
10.1016/S1003-6326(18)64736-3
Effect of clad ratio on interfacial microstructure and properties of cladding billets via direct-chill casting process
H. Zhang (2018)
10.1016/S1359-6462(03)00242-2
Theoretical and experimental analysis of inverse segregation during unidirectional solidification of an Al–6.2 wt.% Cu alloy
I. Ferreira (2003)
10.1007/BF02650080
An internal variable description of solidification suitable for macrosegregation modeling
A. Mo (1994)
10.1016/S0307-904X(03)00115-X
An explicit scheme for coupling temperature and concentration fields in solidification models
V. Voller (2004)
10.1016/J.IJHEATMASSTRANSFER.2005.06.008
Numerical study of macrosegregation in Aluminum alloys solidifying on uneven surfaces
D. Samanta (2005)
10.1016/J.JALLCOM.2019.05.106
A model for coupling prediction of inverse segregation and porosity for up-vertical unidirectional solidification of Al–Cu alloys
Z. Gao (2019)
10.1016/S0065-2717(08)70142-4
Convection heat and mass transfer in alloy solidification
P. J. Prescott (1996)
10.1016/J.SCRIPTAMAT.2003.11.012
On macrosegregation in ternary Al–Cu–Si alloys: numerical and experimental analysis
I. Ferreira (2004)
10.1016/J.IJHEATMASSTRANSFER.2015.08.046
Numerical investigation of weld pool behaviors and ripple formation for a moving GTA welding under pulsed currents
J. Liu (2015)
10.1007/s12613-016-1327-8
Interfacial characteristics and properties of a low-clad-ratio AA4045/AA3003 cladding billet fabricated by semi-continuous casting
X. Han (2016)
10.1115/1.4001479
Three-Dimensional Modeling of Gas Metal Arc Welding of Aluminum Alloys
H. Guo (2010)
10.1108/09615539710163257
Computational issues in using a dual‐scale model of the segregation process in a binary alloy
S. Sundarraj (1997)
10.1016/J.ACTAMAT.2017.01.042
Solidification modelling for coupling prediction of porosity and segregation
Z. Gao (2017)
10.1007/s11663-013-9986-6
Study on the Macrosegregation Behavior for the Bloom Continuous Casting: Model Development and Validation
H. Sun (2013)
10.1007/s11663-011-9616-0
Interdendritic Strain and Macrosegregation-Coupled Phenomena for Interdendritic Crack Formation in Direct-Chill Cast Sheet Ingots
M. O. El-Bealy (2011)
10.1063/1.1886272
Probing liquation cracking and solidification through modeling of momentum, heat, and solute transport during welding of aluminum alloys
S. Mishra (2005)
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