Al-CuおよびAl-Zn合金のデンドライト成長機構とフェーズフィールド法シミュレーション Dendritic growth mechanism and phase-field simulation of Al-Cu and Al-Zn alloy

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The isothermal dendrite growth process in an Al–Zn binary alloy was simulated using the phase-field method. It was clarified that the larger the super cooling was, the finer the dendrite structure became. In addition, the relationships between the growth velocity of the primary dendrite arm (<i>V</i>) and the dimensionless super cooling (Δ) and between the radius of the primary dendrite arm (<i>d</i>) and the dimensionless super cooling (Δ) were qualitatively clarified from a viewpoint of the scaling theory. A comparative study between the phase-field method and the dendrite growth theory was also performed by utilizing the previous data of the Al–Cu alloy and the present data of the Al–Zn alloy. The growth velocity of the primary dendrite arm (<i>V</i>) , the radius of the primary dendrite arm (<i>R</i>) and the solute distribution at a solid-liquid interface were determined and compared. The values showed that the agreement between the phase-field simulation and the dendrite growth theory was good if the shape of a dendrite tip was parabolic. In a region with large super cooling, where the growth mode changes from a dendrite to cell, the dendrite growth theory becomes invalid.

収録刊行物

  • 軽金属

    軽金属 53(2), 67-73, 2003-02-28

    The Japan Institute of Light Metals

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各種コード

  • NII論文ID(NAID)
    10010172398
  • NII書誌ID(NCID)
    AN00069773
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    04515994
  • NDL 記事登録ID
    6472273
  • NDL 雑誌分類
    ZP41(科学技術--金属工学・鉱山工学)
  • NDL 請求記号
    Z17-284
  • データ提供元
    CJP書誌  CJP引用  NDL  J-STAGE 
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