7475系アルミニウム合金温間圧延材の微細粒組織形成に及ぼすロール温度の影響 Effect of roll temperature on formation of refined grains of warm-rolled 7475 based aluminum alloy sheets

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The effect of temperature of the rolls from 2°C to 110°C in the warm roll process at 350°C was investigated in an attempt to refine the structure of the 7475 based aluminum alloy sheets including Zr which were heated after each roll pass. It was found that a lower temperature of the rolls led the alloy sheets to coarser grain structure after solution heat treatment. The {100} <011> Diagonal Cube component appeared in the surface layer, which suggested that strong shear bands had been formed during rolling in the layer. It was thought that these shear bands acted as nucleation sites for the recrystallized grains in solution heat treatment and contributed to the development of the coarse grain structure in the surface layer. Regarding the center region of the rolled plates, low temperature of the roll did not cause sufficient plastic deformation because of the cyclic occurrence of hardening and softening at the surface layer in the warm rolling process. Consequently, the center region also became coarse grain structure after solution heat treatment. On the contrary, in the case of a higher temperature of the rolls, the subgrain structure less than 3 μm was formed uniformly through the thickness of the plates after solution heat treatment with the strong Brass texture component.

収録刊行物

  • 軽金属

    軽金属 52(5), 231-235, 2002-05-30

    The Japan Institute of Light Metals

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各種コード

  • NII論文ID(NAID)
    10008559348
  • 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
    6170382
  • 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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