Experimental and numerical analysis of grain refinement effect on hot tearing susceptibility for Al–Mg alloys

R. Takai*, N. Endo, R. Hirohara, T. Tsunoda, Makoto Yoshida

*この研究の対応する著者

    研究成果: Article査読

    6 被引用数 (Scopus)

    抄録

    Results of finite element method (FEM) thermal stress analyses during solidification of an Al–Mg alloy with different grain sizes revealed the contribution of the macroscopic strain to the reduction of hot tearing susceptibility by the grain refinement. This study used an elasto-creep model to describe the mechanical behavior of the alloy in the semi-solid state. The grain size–dependence was described using the experimentally determined two parameters of n (=dlogε ̇ c/dlogσ) and A in the power-law creep model in earlier work. Results showed that grain refinement makes the creep strain distribution more uniform and suppresses the maximum strain value during solidification, which in turn should contribute to reducing the hot tearing susceptibility. This result demonstrates that the grain size–dependence of the two creep parameters during the solidification is a key factor for the quantitative prediction of hot tearing tendency with the consideration of grain size.

    本文言語English
    ジャーナルInternational Journal of Advanced Manufacturing Technology
    DOI
    出版ステータスAccepted/In press - 2018 1 1

    ASJC Scopus subject areas

    • 制御およびシステム工学
    • ソフトウェア
    • 機械工学
    • コンピュータ サイエンスの応用
    • 産業および生産工学

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