Phase field simulation of equiaxed solidification in technical alloys

被引：216

作者：

Boettger, B. ^{[1
]}

Eiken, J. ^{[1
]}

Steinbach, I. ^{[1
]}

机构：

[1] Rhein Westfal TH Aachen, D-52072 Aachen, Germany

来源：

ACTA MATERIALIA | 2006年 / 54卷 / 10期

关键词：

solidification; phase field models; dendritic growth; microstructure; -; equiaxed; magnesium alloys;

D O I：

10.1016/j.actamat.2006.02.008

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

It is shown how the phase field method can be applied to simulate the equiaxed solidification of commercial alloys in technical processes. A multicomponent multiphase field model is coupled to thermodynamic databases. To handle the complex phase diagrams a local quasi-binary extrapolation is applied. Nucleation is treated by statistically distributed seed particles, taking into account the shielding of nucleation sites by recalescence, solute diffusion and growth of solid phases. To reduce computation time it is discussed how three-dimensional phenomena can be approximated by two-dimensional simulations,. and the model for latent heat release is adjusted accordingly. As examples, simulations are presented of the commercial Mg-Al-Zn alloy AZ31. a hypereutectic Al-Si-Cu-Mg-Ni piston alloy and AlCu4Si17Mg. (c) 2006 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：2697 / 2704

页数：8

共 22 条

[1] PHASE-FIELD AND SHARP-INTERFACE ALLOY MODELS [J].

CAGINALP, G ;

XIE, W .

PHYSICAL REVIEW E, 1993, 48 (03) :1897-1909

[2]

EIKEN J, IN PRESS PHYS REV E

[3] Coupling of multicomponent thermodynamic databases to a phase field model:: Application to solidification and solid state transformations of superalloys [J].

Grafe, U ;

Böttger, B ;

Tiaden, J ;

Fries, SG .

SCRIPTA MATERIALIA, 2000, 42 (12) :1179-1186

[4] Grain refinement of aluminium alloys by inoculation [J].

Greer, AL ;

Cooper, PS ;

Meredith, MW ;

Schneider, W ;

Schumacher, P ;

Spittle, JA ;

Tronche, A .

ADVANCED ENGINEERING MATERIALS, 2003, 5 (1-2) :81-91

[5] Three-dimensional dendrite-tip morphology at low undercooling [J].

Karma, A ;

Lee, YH ;

Plapp, M .

PHYSICAL REVIEW E, 2000, 61 (04) :3996-4006

[6] Phase-field model for binary alloys [J].

Kim, SG ;

Kim, WT ;

Suzuki, T .

PHYSICAL REVIEW E, 1999, 60 (06) :7186-7197

[7] Phase-field model for solidification of ternary alloys coupled with thermodynamic database [J].

Kobayashi, H ;

Ode, M ;

Kim, SG ;

Kim, WT ;

Suzuki, T .

SCRIPTA MATERIALIA, 2003, 48 (06) :689-694

[8] MODELING AND NUMERICAL SIMULATIONS OF DENDRITIC CRYSTAL-GROWTH [J].

KOBAYASHI, R .

PHYSICA D, 1993, 63 (3-4) :410-423

[9] DENDRITIC GROWTH INTO UNDERCOOLED ALLOY MELTS [J].

LIPTON, J ;

GLICKSMAN, ME ;

KURZ, W .

MATERIALS SCIENCE AND ENGINEERING, 1984, 65 (01) :57-63

[10] A multi-phase-field model of eutectic and peritectic alloys: numerical simulation of growth structures [J].

Nestler, B ;

Wheeler, AA .

PHYSICA D, 2000, 138 (1-2) :114-133

← 1 2 3 →