Extra strengthening and superplasticity of ultrafine-grained A2024 alloy produced by high-pressure sliding

Takahiro Masuda, Yoichi Takizawa, Manabu Yumoto, Yoshiharu Otagiri, Zenji Horita

    研究成果: Contribution to journalArticle査読

    3 被引用数 (Scopus)

    抄録

    In this study, the method of high-pressure sliding (HPS) was applied for grain refinement of an A2024 alloy. Sheet samples with 10-15 mm width and 100 mm length with 1 mm thickness were processed by HPS under pressures of 2-3 GPa. Microstructural observations revealed that the grain size was refined to ∼200 nm. Tensile tests showed that the ultimate tensile strength reached 886 MPa with a total elongation of 7.1% and the anisotropy of samples was less developed in the HPS-processed samples. Extra strengthening was attained by aging at 423 K after HPS processing, leading to an ultimate tensile strength of 967 MPa at the peak aged condition. Superplastic elongation of more than 400% appeared when the A2024 alloy processed by HPS for 20 mm was deformed in tension at a testing temperature of 623 K with an initial strain rate of 1.0× 10-3 s-1.

    本文言語英語
    ページ(範囲)1647-1655
    ページ数9
    ジャーナルMaterials Transactions
    58
    12
    DOI
    出版ステータス出版済み - 2017

    All Science Journal Classification (ASJC) codes

    • Materials Science(all)
    • Condensed Matter Physics
    • Mechanics of Materials
    • Mechanical Engineering

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