Experimental and computational studies of competitive precipitation behavior observed in microstructures with high dislocation density and ultra-fine grains

Tetsuya Masuda, Shoichi Hirosawa, Zenji Horita, Kenji Matsuda

    研究成果: Chapter in Book/Report/Conference proceedingConference contribution

    2 被引用数 (Scopus)

    抄録

    The competitive precipitation behavior observed in microstructures with high dislocation density and ultra-fine grains has been studied experimentally and computationally for cold-rolled and severe plastic deformed Al-Mg-Si alloy. The age-hardenability at 443K was reduced by the two deformation processes due to the accelerated formation of larger precipitates on dislocations and grain boundaries, in place of the transgranular precipitation of refined β" in the matrix. The developed numerical model based on the classical heterogeneous nucleation theory clarified the dislocation density and grain size dependences of the volume fraction of precipitates nucleated at different sites, in good agreement with experimental results. It could be therefore possible that three strengthening mechanisms of strain hardening, hardening by grain refinement and precipitation hardening are optimally exploited according to the computationally estimated dependences.

    本文言語英語
    ホスト出版物のタイトルTHERMEC 2011
    出版社Trans Tech Publications Ltd
    ページ1787-1792
    ページ数6
    ISBN(印刷版)9783037853030
    DOI
    出版ステータス出版済み - 2012
    イベント7th International Conference on Processing and Manufacturing of Advanced Materials, THERMEC'2011 - Quebec City, QC, カナダ
    継続期間: 8 1 20118 5 2011

    出版物シリーズ

    名前Materials Science Forum
    706-709
    ISSN(印刷版)0255-5476
    ISSN(電子版)1662-9752

    その他

    その他7th International Conference on Processing and Manufacturing of Advanced Materials, THERMEC'2011
    国/地域カナダ
    CityQuebec City, QC
    Period8/1/118/5/11

    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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