期刊
出版社
SPRINGER
DOI: 10.1007/s11663-021-02330-3
关键词
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资金
- Industrial Strong Foundation Project [DTCC28EE190929]
- Double First-Class Construction Fund [111800XX62]
- Mechanical Engineering Discipline Construction Fund [111800M000]
The study introduces a modulated permanent helical magnetic field to improve segregation during directional solidification in a binary alloy, reducing solute segregation otherwise caused by conventional helical magnetic fields. Experimental results demonstrate that this magnetic field, with an appropriate modulation frequency, can not only promote columnar-to-equiaxed transition (CET) but also has advantages over natural convection and conventional electromagnetically forced convection.
In this paper, a modulated permanent helical magnetic field is imposed to improve segregation during directional solidification in a binary Sn-3.5 wt pct Pb alloy. The magnetic force created by this magnetic field significantly interferes with heat, mass and momentum transfer of molten metal during solidification. Our experimental results show that this magnetic field, with an appropriate modulation frequency, can not only promote columnar-to-equiaxed transition (CET) but also significantly reduce solute segregation otherwise caused by conventional helical magnetic fields. Our analysis demonstrates the advantages of this approach over natural convection and conventional electromagnetically forced convection.
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