Journal of Japan Foundry Engineering Society
Online ISSN : 2185-5374
Print ISSN : 1342-0429
ISSN-L : 1342-0429
Volume 95, Issue 6
Displaying 1-8 of 8 articles from this issue
Special Articles Foreword for Special Issue on Carbon Neutrality and Casting Technology
Review Paper
Research Article
  • Keiji Shiga, Yuichiro Murakami, Naoki Omura
    2023 Volume 95 Issue 6 Pages 320-327
    Published: June 25, 2023
    Released on J-STAGE: July 01, 2023
    JOURNAL RESTRICTED ACCESS

      A rotating magnetic field was applied during the solidification of Al-Si-Fe alloys (Si = 5mass% or 10mass% and Fe = 0.5mass% or 1mass%) and the effect of electromagnetic stirring on the area and shape of the intermetallic compounds was studied. The phases formed during solidification of the alloys were not influenced by electromagnetic stirring. The alloys consisted of α-Al, Si and intermetallic β-Al9Fe2Si2. At coil current frequencies above 10 Hz, electromagnetic stirring induced fragmentation of dendritic α-Al, giving rise to coarsening of the β-Al9Fe2Si2 present between the fragmented α-Al grains. The application of electromagnetic stirring at coil current frequencies above 80 Hz decreased the aspect ratio of β-Al9Fe2Si2 in Al-10mass%Si-1mass%Fe, while no such decrease was identified in Al-5mass%Si-0.5mass%Fe, Al-5mass%Si-1mass%Fe or Al-10mass%Si-0.5mass%Fe. It was found that the shape of the β-Al9Fe2Si2 phase formed under forced flow of the melt depended significantly on the stirring intensity and the solid fraction of the melt at which intermetallic compounds were formed.

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