Developing a superplastic forming capability in a commercial aluminum alloy without scandium or zirconium additions

S. Lee, M. Furukawa, Z. Horita, T. G. Langdon

    研究成果: Contribution to journalArticle査読

    67 被引用数 (Scopus)

    抄録

    Tests were undertaken to determine the feasibility of producing a superplastic forming capability in a commercial Al-2024 alloy through processing by equal-channel angular pressing (ECAP), where this alloy was selected because it contains no scandium or zirconium additions that are generally beneficial in retaining an array of small grains. Processing by ECAP produced grain sizes in the range from ∼ 0.3 to ∼ 0.5 μ and static annealing showed these ultrafine grains were reasonably stable at temperatures up to ∼ 700 K. Superplastic elongations were achieved after ECAP with a maximum elongation of ∼ 500% at 673 K when using a strain rate of 1.0 × 10-2 s-1. The strain rate sensitivity was measured as ∼ 0.3 suggesting that dislocation glide is the rate-controlling mechanism. These results demonstrate the potential for achieving high tensile ductilities in conventional commercial aluminum alloys through processing by ECAP.

    本文言語英語
    ページ(範囲)294-301
    ページ数8
    ジャーナルMaterials Science and Engineering A
    342
    1-2
    DOI
    出版ステータス出版済み - 2 15 2003

    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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