Unsteady-state solidification under forced flow conditions

被引:2
作者
Turchin, A. N. [1 ]
Eskin, D. G. [1 ]
Katgerman, L. [2 ]
机构
[1] Netherlands Inst Met Res, Mekelweg 2, NL-2600 GA Delft, Netherlands
[2] Delft Univ Technol, Dept Mat Sci & Engn, NL-2628CD Delft, Netherlands
来源
PRICM 6: SIXTH PACIFIC RIM INTERNATIONAL CONFERENCE ON ADVANCED MATERIALS AND PROCESSING, PTS 1-3 | 2007年 / 561-565卷
关键词
forced flow; aluminum; solidification;
D O I
10.4028/www.scientific.net/MSF.561-565.991
中图分类号
TF [冶金工业];
学科分类号
0806 ;
摘要
The interaction between flow and progressing solidification front is of great importance, since it occurs in all casting processes. The present paper provides a better understanding of the flow phenomena and associated complex effects on solidification in a rectangular cavity under forced flow conditions, by means of experiments and computer simulations. It is shown that the cavity-driven flow, with solidification is determined by several interacting features. The variation in bulk flow velocity and initial superheat dramatically changes the macro- and microstructure, promoting grain refinement, formation of peculiar grain and dendrite morphologies, etc. In particular, twinned feathery grains are found in the structure formed under certain heat and flow conditions during solidification. Some correlations between twinned feathery morphology, flow and solidification parameters are obtained. The effect of flow vortices on progressing solidification front and their effects on structure evolution are analyzed. Finally, the quantitative correlations between microstructure, solidification and flow parameters are established.
引用
收藏
页码:991 / +
页数:2
相关论文
共 9 条
[1]  
FEURER U, 1978, QUALITY CONTROL ENG, P131
[2]   INFLUENCE OF MELT FLOW ON THE GROWTH DIRECTIONS OF COLUMNAR GRAINS AND COLUMNAR DENDRITES [J].
MURAKAMI, K ;
FUJIYAMA, T ;
KOIKE, A ;
OKAMOTO, T .
ACTA METALLURGICA, 1983, 31 (09) :1425-1432
[3]  
Nikrityuk P. A., 2006, Modeling of Casting, Welding, and Advanced Solidification Processes-XI, P333
[4]   A numerical study of unidirectional solidification of a binary metal alloy under influence of a rotating magnetic field [J].
Nikrityuk, PA ;
Eckert, K ;
Grundmann, R .
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 2006, 49 (7-8) :1501-1515
[5]   Effect of melt flow on macro- and microstructure evolution during solidification of an Al-4.5% Cu alloy [J].
Turchin, AN ;
Eskin, DG ;
Katgerman, L .
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2005, 413 :98-104
[6]  
TURCHIN AN, 2007, IN PRESS METALL MA A
[7]  
TURCHIN AN, 2007, IN PRESS ACTA MAT
[8]   Numerical simulation of incompressible laminar flow over three-dimensional rectangular cavities [J].
Yao, H ;
Cooper, RK ;
Raghunathan, S .
JOURNAL OF FLUIDS ENGINEERING-TRANSACTIONS OF THE ASME, 2004, 126 (06) :919-927
[9]  
FLOW 3 D USERS MANUA