Investigation of the Melt Flow on Solidified Structure by a Levitation Technique Using Alternative and Static Magnetic Fields

DOI Web Site 被引用文献9件 参考文献26件
  • YASUDA Hideyuki
    Department of Adaptive Machine Systems, Osaka University
  • OHNAKA Itsuo
    Department of Adaptive Machine Systems, Osaka University
  • ISHII Rintaro
    Graduate student, Department of Adaptive Machine Systems, Graduate school of Engineering, Osaka University
  • FUJITA Satoru
    Graduate student, Department of Adaptive Machine Systems, Graduate school of Engineering, Osaka University
  • TAMURA Yuki
    Graduate student, Department of Adaptive Machine Systems, Graduate school of Engineering, Osaka University

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A levitation method using the simultaneous imposition of an alternating field and a static magnetic field was applied to study effect of the melt flow on the microstructure of Cu, Cu-1at%Ag alloys, a middle carbon steel alloys and Fe-10at%Ni alloys solidified from the undercooled melt. Convection in the levitated melts was remarkably reduced when the imposed static magnetic field exceeded 1T. Reduction of the melt flow did not affect the nucleation temperature, but caused the morphological transition from the equiaxed grains to the columnar grains for the Cu-Ag, the steel and the Fe-Ni alloys. The experimental results indicated that the melt flow in the mushy region caused the dendrite fragmentation and consequently resulted in formation of the equiaxed grains at the low undercooling region.

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