Characterization of crack-tip dislocations and their effects on materials fracture

Kenji Higashida, Masaki Tanaka, Sunao Sadamatsu

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

    抄録

    Three-dimensional structure of crack tip dislocations were investigated by combining scanning transmission electron microscopy (STEM) and electron tomography (ET) in silicon single crystals. P-type (001) silicon single crystals were employed. <110> cracks were introduced from an indent on the (001) surface. The specimen was heated at 873K in order to introduce dislocations at the crack tips. The specimen was thinned to include the crack tip in the foil by an iron milling machine. STEM-ET observation revealed the three-dimensional structure of crack tip dislocations. Their Burgers vectors were determined by using an invisibility criterion. The local stress intensity factor was calculated using the dislocation characters obtained in the observation in this study, indicating that the dislocations observed were mode II shielding type dislocations.

    本文言語英語
    ホスト出版物のタイトルPRICM7
    ページ2307-2311
    ページ数5
    654-656
    DOI
    出版ステータス出版済み - 2010
    イベント7th Pacific Rim International Conference on Advanced Materials and Processing, PRICM-7 - Cairns, QLD, オーストラリア
    継続期間: 8 2 20108 6 2010

    出版物シリーズ

    名前Materials Science Forum
    654-656
    ISSN(印刷版)02555476

    その他

    その他7th Pacific Rim International Conference on Advanced Materials and Processing, PRICM-7
    国/地域オーストラリア
    CityCairns, QLD
    Period8/2/108/6/10

    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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