温間異周速圧延による6061アルミニウム合金の結晶粒微細化 Grain refinement of a 6061 aluminum alloy by asymmetric warm-rolling

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著者

    • 崔 祺 CUI Qi
    • 三菱アルミニウム(株)技術開発センター Technical Development Center Mitsubishi Aluminum Co., Ltd.
    • 大堀 紘一 OHORI Koichi
    • 三菱アルミニウム(株)技術開発センター Technical Development Center Mitsubishi Aluminum Co., Ltd.

抄録

For the purpose of grain refinement, the development of the microstructure of 6061 aluminum alloys during asymmetric warm-rolling was studied by electron backscatter pattern (EBSP) analysis, as well as optical and transmission electron microscopy, and compared with that developed during conventional warm-rolling. In asymmetrically rolled sheets to a thickness reduction of 91.8% at 300°C, new fine grains with an average size of about 1 μm are evolved almost uniformly throughout the thickness. The fraction of fine grains in asymmetrically warm-rolling sheet increased with an increase in thickness reduction and a rise in temperature, whereas for conventionally warm-rolled sheet, the usual fibrous microstructure is predominant. The evolution of new fine grains during asymmetric warm-rolling seems to be due to the subgrain formation and the development of the subgrain into fine grain promoted by a simultaneous action of two deformation modes, namely compression and additional shear deformation. However, the obvious growth of fine grains was observed during solution treatment. For suppression of such a grain growth, scandium addition to 6061 alloy is effective.

収録刊行物

  • 軽金属

    軽金属 52(4), 185-189, 2002-04-30

    The Japan Institute of Light Metals

参考文献:  8件中 1-8件 を表示

被引用文献:  3件中 1-3件 を表示

各種コード

  • NII論文ID(NAID)
    10008222479
  • 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
    6147263
  • 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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