NUMERICAL INVESTIGATION OF THE INFLUENCE OF FORCED CONVECTION INDUCED BY A TRAVELLING MAGNETIC FIELD DURING SOLIDIFICATION OF METALLIC ALLOYS

被引：3

作者：

Noeppel, A. ^{[1
]}

Budenkova, O. ^{[1
,2
]}

Fautrelle, Y. ^{[1
]}

机构：

[1] Polytech Inst Grenoble, SIMAP, EPM, Grenoble, France

[2] AF Ioffe Phys Tech Inst, St Petersburg, Russia

来源：

MAGNETOHYDRODYNAMICS | 2009年 / 45卷 / 04期

关键词：

PB-SN ALLOYS; SOLUTE DIFFUSION-MODEL; CHANNEL FORMATION; FLUID-FLOW; GROWTH;

D O I：

10.22364/mhd.45.4.2

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

Two-dimensional axisymmetric numerical simulations of Bridgman solidification of a binary alloy Al-Ni 3.5wt% under forced convection induced by a travelling magnetic field (TMF) are performed. It is found that the TMF promotes segregation through the formation of a large channel, which can appear either at the center of an ingot or at its periphery. Position of the channel depends on the direction of applied magnetic force that corresponds to results of earlier experiments. A phenomenon of instability due to the competition between natural and forced convection in the mushy zone influencing the shape of the channels has been demostrated.

引用

页码：497 / 503

页数：7

共 16 条

[1] Suppression of channel convection in solidifying Pb-Sn alloys via an applied magnetic field [J].

Bergman, MI ;

Fearn, DR ;

Bloxham, J .

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 1999, 30 (07) :1809-1815

[2] Convection and channel formation in solidifying Pb-Sn alloys [J].

Bergman, MI ;

Fearn, DR ;

Bloxham, J ;

Shannon, MC .

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 1997, 28 (3A) :859-866

[3] MACROSCOPIC STABILITY OF A PLANAR, CELLULAR OR DENDRITIC INTERFACE DURING DIRECTIONAL FREEZING [J].

BURDEN, MH ;

HEBDITCH, DJ ;

HUNT, JD .

JOURNAL OF CRYSTAL GROWTH, 1973, 20 (02) :121-124

[4] Ensemble averaged multiphase Eulerian model for columnar/equiaxed solidification of a binary alloy: I. The mathematical model [J].

Ciobanas, A. I. ;

Fautrelle, Y. .

JOURNAL OF PHYSICS D-APPLIED PHYSICS, 2007, 40 (12) :3733-3762

[5] Time-dependent magnetic field influence on GaAs crystal growth by vertical Bridgman method [J].

Lyubimova, TP ;

Croell, A ;

Dold, P ;

Khlybov, OA ;

Fayzrakhmanova, IS .

JOURNAL OF CRYSTAL GROWTH, 2004, 266 (1-3) :404-410

[6]

Moreau R, 1990, Magnetohydrodynamics. Fluid mechanics and its applications, V3

[7] Evaluation of a Rayleigh-number-based freckle criterion for Pb-Sn alloys and Ni-base superalloys [J].

Ramirez, JC ;

Beckermann, C .

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 2003, 34A (07) :1525-1536

[8] SOLUTE DIFFUSION-MODEL FOR EQUIAXED DENDRITIC GROWTH [J].

RAPPAZ, M ;

THEVOZ, P .

ACTA METALLURGICA, 1987, 35 (07) :1487-1497

[9] CHANNEL FORMATION IN PB-SN, PB-SB, AND PB-SN-SB ALLOY INGOTS AND COMPARISON WITH THE SYSTEM NH4CL-H2O [J].

SARAZIN, JR ;

HELLAWELL, A .

METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 1988, 19 (07) :1861-1871

[10] FORMATION OF MACROSEGREGATION BY MULTICOMPONENT THERMOSOLUTAL CONVECTION DURING THE SOLIDIFICATION OF STEEL [J].

SCHNEIDER, MC ;

BECKERMANN, C .

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 1995, 26 (09) :2373-2388

← 1 2 →