Equal-channel angular pressing as a production tool for superplastic materials

Zenji Horita, S. Lee, S. Ota, K. Neishi, T. G. Langdon

    研究成果: Contribution to journalConference article査読

    12 被引用数 (Scopus)

    抄録

    Equal-channel angular pressing (ECAP) was applied for grain refinement of Al-3%Mg-0.2%Fe and Al-3%Mg-0.2%Ti alloys and also for a commercial Al 2024 alloy. The grain sizes of the alloys were reduced to ∼0.3 μm. The stability of the fine-grained structures were examined and it was found that the small grains remained stable up to the temperatures of ∼250°C for the Al-3%Mg-0.2%Fe and Al-3%Mg-0.2%Ti alloys and ∼400°C for the Al 2024 alloy. Tensile tests revealed maximum elongations of ∼370% and ∼180% in the Al-3%Mg-0.2%Fe and Al-3%Mg-0.2%Ti alloys, respectively, at a temperature of 250°C with an initial strain rate of 3.3×10-4 s-1. There is some evidence for low temperature superplasticity in the Al-3%Mg-0.2%Fe alloy. A maximum elongation of ∼460% was attained in the Al 2024 alloy at 400°C with an initial strain rate of 10-3 s-1. It is demonstrated that the ECAP can be effective in producing superplastic materials.

    本文言語英語
    ページ(範囲)471-476
    ページ数6
    ジャーナルMaterials Science Forum
    357-359
    DOI
    出版ステータス出版済み - 2001
    イベントSuperplasticity in Advanced Materials (ICSAM-2000) - Orlando, FL, 米国
    継続期間: 8 1 20008 4 2000

    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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