Superplasticity of ultrafine-grained Al-3%Mg-0.2%Sc alloy produced by equal-channel angular pressing

Takeshi Fujita, Shogo Komura, Zenji Horita, Terence G. Langdon

    研究成果: Contribution to journalArticle査読

    4 被引用数 (Scopus)

    抄録

    This paper describes grain refinement of an Al-3%Mg-0.2%Sc alloy using the equal-channel angular pressing (ECAP) technique at room temperature. It is shown that a grain size of 0.2 μm is obtained with this technique. The paper also presents the results of tensile tests for the fine-grained Al-3%Mg-0.2%Sc alloy over a wide range of strain rates. Elongations of more than 1000% are attained at a temperature of 673 K in a high strain rate range of more than 10-2 s-1. Transmission electron microscopy and scanning ion microscopy are employed for microstructural observations before and after tensile testing. The results are compared with those of a cold-rolled Al-3%Mg-0.2%Sc alloy. It is demonstrated that grain refinement using the ECAP technique is useful for the production of Al alloys exhibiting high strain rate superplasticity.

    本文言語英語
    ページ(範囲)376-380
    ページ数5
    ジャーナルKeikinzoku/Journal of Japan Institute of Light Metals
    50
    8
    DOI
    出版ステータス出版済み - 8 2000

    All Science Journal Classification (ASJC) codes

    • 材料力学
    • 機械工学
    • 金属および合金
    • 材料化学

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