The effects of microstructures on the ductile fracture surface morphology in duplex stainless steel

Yuma Honda, Naoya Yamada, Masatoshi Aramaki, Makoto Oikawa, Osamu Furukimi

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

    抄録

    The effect of austcnitc and fcrritc phases on fraclurc stirfacc morphology were examined for a duplex stainless steel by focusing on the crack propagation properties closely related to the formation of fracture surface. The materials tested have the austenite phase and the ferrite phase in the proportion of seven parts to three. The forged duplex stainless steels were tested instrumented Charpy test to investigate the ductile fracture toughness and the crack propagation energy. The microstmcturcs beneath the fracture surface were investigated to reveal the relationship between microstructures and fracture surface morphology. As a result of observations, it was found that the fracture surface profiles examined on austenite grains showed rough periphery and became fine, whereas the fracture surface on lerritc grains was relatively flat. It is caused that the crystal orientation of the austcnitc phase was random and the cracks on the austcnitc grains spread in various, while the ferrite phase have (001) texture and on the ferrite grains spread only in one direction.

    本文言語英語
    ホスト出版物のタイトルProceedings of the 17th IFHTSE Congress
    出版社The Japan Society for Heat Treatment (JSHT)
    ページ522-525
    ページ数4
    ISBN(電子版)9780000000002
    出版ステータス出版済み - 2008
    イベント17th International Federation for Heat Treatment and Surface Engineering Congress 2008, IFHTSE 2008 - Kobe, 日本
    継続期間: 10 26 200810 28 2008

    出版物シリーズ

    名前Proceedings of the 17th IFHTSE Congress
    2

    その他

    その他17th International Federation for Heat Treatment and Surface Engineering Congress 2008, IFHTSE 2008
    国/地域日本
    CityKobe
    Period10/26/0810/28/08

    All Science Journal Classification (ASJC) codes

    • 表面、皮膜および薄膜
    • 凝縮系物理学
    • 材料力学

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