Localized shear deformation and fracture in a Zr-based bulk metallic glass

Tatsuya Morikawa, Tetsuro Kawada, Kenji Higashida

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

    抄録

    Behaviors of fracture and deformation in a Zr-Al-Ni-Cu bulk metallic glass(BMG) was investigated by using three-point bending tests. Apparent fracture toughness obtained by bending test was 40MPam1/2 which is comparable to the value of ductile crystalline metals. This high toughness of the BMG should be understood by the crack-tip plasticity as well as crystalline metals. It is well known that plastic deformation occurs very inhomogeneously when BMGs are deformed at room temperature. Such inhomogeneity is manifested by the appearance of surface steps caused by localized shear deformation. In the present study, the surface steps due to the localized shear bands near a fracture surface have been examined in detail by using SEM and AFM, where much attention has been paid on the variation of the surface step height measured along the localized shear band. The variation of the step height indicates the gradient of plastic shear deformation, and it can be understood, in principle, as the introduction of elastic singularities corresponding dislocations in the case of crystalline materials.

    本文言語英語
    ホスト出版物のタイトルSupplement to THERMEC 2006, 5th International Conference on PROCESSING and MANUFACTURING OF ADVANCED MATERIALS, THERMEC 2006
    ページ2094-2099
    ページ数6
    539-543
    PART 2
    出版ステータス出版済み - 2007
    イベント5th International Conference on Processing and Manufacturing of Advanced Materials - THERMEC'2006 - Vancouver, カナダ
    継続期間: 7 4 20067 8 2006

    出版物シリーズ

    名前Materials Science Forum
    番号PART 2
    539-543
    ISSN(印刷版)02555476

    その他

    その他5th International Conference on Processing and Manufacturing of Advanced Materials - THERMEC'2006
    国/地域カナダ
    CityVancouver
    Period7/4/067/8/06

    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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