Optimizing the procedure of equal-channel angular pressing for maximum superplasticity

Shogo Komura, Minoru Furukawa, Zenji Horita, Minoru Nemoto, Terence G. Langdon

    研究成果: Contribution to journalArticle査読

    161 被引用数 (Scopus)

    抄録

    The imposition of severe plastic straining on an Al-3% Mg-0.2% Sc alloy through equal-channel angular pressing (ECAP) reduces the grain size to ca. 0.2 μm and provides an opportunity to achieve superplastic elongations at high strain rates. Experiments were conducted to evaluate the procedure for optimizing the ECAP process in order to attain maximum superplastic ductilities. The results show that: (i) high elongations are achieved only after each sample has been subjected to a sufficiently high strain to establish a homogeneous array of grains separated by high angle boundaries and (ii) elongations are a maximum when using processing route BC in which the sample is rotated by 90° in the same sense between each consecutive pressing through the ECAP die.

    本文言語英語
    ページ(範囲)111-118
    ページ数8
    ジャーナルMaterials Science and Engineering A
    297
    1-2
    DOI
    出版ステータス出版済み - 1 15 2001

    All Science Journal Classification (ASJC) codes

    • 材料科学(全般)
    • 凝縮系物理学
    • 材料力学
    • 機械工学

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