異周速圧延によるAZ31マグネシウム合金板の再結晶粒微細化 Refinement of recrystallized grains of AZ31 magnesium alloy sheets by asymmetric rolling

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著者

    • 渡部 晶 WATANABE Akira
    • 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 of AZ31 magnesium alloy sheets, influences of asymmetric rolling conditions such as the roll temperature and the mismatch speed ratio on microstructures and texture were examined, and compared with those of conventional rolling sheet. Grain size of the annealed sheets processed at a roll temperature of 80°C and the rolled sheets processed at a roll temperature of 250°C decreases with increasing mismatch speed ratio. And at a mismatch speed ratio of 1.5, the grain size of 4.2 and 2.4 μm are obtained in the former and the latter, respectively. There is not an obvious difference in textures between the conventionally rolled and the asymmetrically rolled sheets. Proof stresses on the sheets annealed after rolling at 80°C and on the sheets rolled at 250°C increased with decreasing the grain size. Hall-Petch plot for both the sheets showed a good linearity expressed with σ<sub>0.2%</sub>95+0.20<i>d</i><sup>−1/2</sup>. The grain refinement by asymmetric rolling at a roll temperature of 250°C seems to result from the promotion of a continuous recrystallization by a simultaneous action of two deformation mode, namely compression and additional shear deformation.

収録刊行物

  • 軽金属  

    軽金属 57(2), 67-73, 2007-02-28 

    The Japan Institute of Light Metals

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各種コード

  • NII論文ID(NAID)
    10018729276
  • 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
    8722574
  • 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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