Electromagnetic melt flow control during solidification of metallic alloys

被引：71

作者：

Eckert, Sven ^{[1
]}

Nikrityuk, Petr A. ^{[4
]}

Willers, Bernd ^{[1
]}

Raebiger, Dirk ^{[1
]}

Shevchenko, Natalia ^{[1
]}

Neumann-Heyme, Hieram ^{[2
]}

Travnikov, Vadim ^{[2
]}

Odenbach, Stefan ^{[2
]}

Voigt, Axel ^{[3
]}

Eckert, Kerstin ^{[2
]}

机构：

[1] HZDR, Inst Fluid Dynam, D-01314 Dresden, Germany

[2] Tech Univ Dresden, Inst Fluid Mech, D-01062 Dresden, Germany

[3] TUD, Inst Comp Sci, D-01062 Dresden, Germany

[4] TU Bergakad Freiberg, CIC Virtuhcon Dept Energy Proc & Chem Engn, D-09596 Freiberg, Germany

来源：

EUROPEAN PHYSICAL JOURNAL-SPECIAL TOPICS | 2013年 / 220卷 / 01期

关键词：

ROTATING MAGNETIC-FIELD; TO-EQUIAXED TRANSITION; PB-SN ALLOYS; DIRECTIONAL SOLIDIFICATION; DENDRITE FRAGMENTATION; GRAIN-REFINEMENT; FLUID-FLOW; SPIN-UP; MICROSTRUCTURE EVOLUTION; NATURAL-CONVECTION;

D O I：

10.1140/epjst/e2013-01802-7

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

In this minireview, we summarize experimental and numerical studies particularly concerned with applications of rotating magnetic fields (RMF) or travelling magnetic fields (TMF) to directional solidification of metal alloys. After introducing some fundamentals of electromagnetic stirring, we review the insights gained into flow-induced modifications of microstructure and the formation of freckles and macrosegregations. We further discuss recent strategies, using time-modulated RMF and TMF, which aim to overcome the deficiencies of conventional stirring, in particular flow-induced macrosegregation, by effectively controlling the flow field. On the microscale, we show that time-varying flows are able to alter the sidebranch characteristics vital to the potential of fragmentation.

引用

页码：123 / 137

页数：15

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