Electromagnetic melt flow control during solidification of metallic alloys
| Autor: | Petr A. Nikrityuk, Sven Eckert, B. Willers, Vadim Travnikov, Axel Voigt, D. Räbiger, N. Shevchenko, Stefan Odenbach, Kerstin Eckert, H Neumann-Heyme |
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| Jazyk: | angličtina |
| Rok vydání: | 2013 |
| Předmět: |
Materials science
rotating magnetic field General Physics and Astronomy Nanotechnology Mechanics Microstructure Vortex Magnetic field Metallic alloy macrosegregation General Materials Science grain refinement Physical and Theoretical Chemistry solidification traveling magnetic field electromagnetic stirring Microscale chemistry Taylor number Directional solidification Melt flow index |
| Zdroj: | European Physical Journal-Special Topics 220(2013), 123-138 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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