Work hardening mechanism in soft particle dispersion ferritic steel

Nobuo Nakada, Masahiro Murakami, Toshihiro Tsuchiyama, Setsuo Takaki

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

    1 被引用数 (Scopus)

    抄録

    The work hardening behavior was investigated in ferritic steels containing hard particles or soft Cu particles with various volume fractions and particle diameters, and then the effect of plastically deformable soft particles on the work hardening was evaluated in terms of the accumulation of GN dislocations. The amount of work hardening and dislocation density increased with an increase of volume fraction of dispersion particles and a decrease of particle diameter in hard particle dispersion steel. On the other hand, in soft Cu particle dispersion steel, the effect of volume fraction and particle diameter on work hardening behavior was relatively small. TEM observation suggested that stress relaxation around particle takes place by plastic deformation of Cu particle itself. In order to consider the effect of plastic deformation of Cu particles on accumulation of GN dislocations, "particle plastic accommodation parameter" was proposed to modify the Ashby's work hardening theory. As a result, the amount of work hardening was successfully predicted for both the hard and soft particle dispersion steels.

    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2199-2204
    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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