A finite element analysis of the superplastic forming of an aluminum alloy processed by ECAP

Michael J. O'Brien, Hubertus F. von Bremen, Minoru Furukawa, Zenji Horita, Terence G. Langdon

    研究成果: Contribution to journalArticle査読

    17 被引用数 (Scopus)

    抄録

    Finite element analysis (FEA) was used to simulate a superplastic forming operation for an aluminum alloy processed by equal-channel angular pressing (ECAP). An earlier report described the processing of an Al-3% Mg-0.2% Sc alloy by ECAP and the subsequent gas-forming of the as-pressed alloy into domes at 673 K using an unconstrained bulge test. The experiments provided detailed information on the uniaxial tensile behavior over a range of strain rates at 673 K and these stress-strain curves are now used to develop a constitutive relationship based on a strain hardening form of the power-law creep model. The FEA was performed by representing the aluminum disk as linear reduced integration continuum elements and incorporating adaptive remeshing. It is shown that, by assuming a reasonable value of 0.5 for the coefficient of friction between the disk and the clamps, the predicted superplastic forming of the disks is in good agreement with the experimental data for forming times of 30 and 60 s.

    本文言語英語
    ページ(範囲)236-242
    ページ数7
    ジャーナルMaterials Science and Engineering A
    456
    1-2
    DOI
    出版ステータス出版済み - 5 15 2007

    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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