Application of equal-channel angular pressing for grain refinement of plate samples

Masakazu Kamachi, Minoru Furukawa, Zenji Horita, Terence G. Langdon

    研究成果: Chapter in Book/Report/Conference proceedingConference contribution

    抄録

    Equal-channel angular pressing (ECAP) was applied to plate samples of pure Al and an Al-1%Mg-0.2%Sc alloy for grain refinement. The plate sample was rotated by 90° in the same sense about the plate normal between each pass, which was designated in this study route BCZ. Samples were subjected to a total of 4 passes, equivalent to an imposed strain of ∼4. The micro structures were examined using transmission electron microscopy. It was found that the microstructure consisted of equiaxed grains and elongated grains with the former area fractions of-70-80%. The average grain sizes in the equiaxed grain area was ∼0.9 and ∼0.5 μm for pure Al and the Al-1%Mg-0.2%Sc alloy, respectively. The Vickers microhardness was measured on the three orthogonal sections and there was no significant difference throughout each section and between the sections. Tensile tests were conducted at room temperature for pure Al and at 673 K for the Al-1%Mg-0.2%Sc alloy. There was no difference in tensile behavior for the direction of the specimen gauge lengths which were taken parallel to the two orthogonal planes perpendicular to the plate normal. Superplastic ductility of more than 400% was attained in the Al-1%Mg-0.2%Sc alloy.

    本文言語英語
    ホスト出版物のタイトルUltrafine Grained Materials III
    編集者Y.T. Zhu, T.G. Langdon, R.Z. Valiev, S. Lee Semiatin, al et al
    ページ407-412
    ページ数6
    出版ステータス出版済み - 7 14 2004
    イベントUltrafine Grained Materials III - Charlotte, NC., 米国
    継続期間: 3 14 20043 18 2004

    出版物シリーズ

    名前Ultrafine Grained Materials III

    その他

    その他Ultrafine Grained Materials III
    国/地域米国
    CityCharlotte, NC.
    Period3/14/043/18/04

    All Science Journal Classification (ASJC) codes

    • 工学(全般)

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