Extraordinary plasticity of ductile bulk metallic glasses

Mingwei Chen, Akihisa Inoue, Wei Zhang, Toshio Sakurai

    Research output: Contribution to journalArticlepeer-review

    254 Citations (Scopus)

    Abstract

    Shear bands generally initiate strain softening and result in low ductility of metallic glasses. In this Letter, we report high-resolution electron microscope observations of shear bands in a ductile metallic glass. Strain softening caused by localized shearing was found to be effectively prevented by nanocrystallization that is in situ produced by plastic flow within the shear bands, leading to large plasticity and strain hardening. These atomic-scale observations not only well explain the extraordinary plasticity that was recently observed in some bulk metallic glasses, but also reveal a novel deformation mechanism that can effectively improve the ductility of monolithic metallic glasses.

    Original languageEnglish
    Article number245502
    JournalPhysical review letters
    Volume96
    Issue number24
    DOIs
    Publication statusPublished - 2006

    ASJC Scopus subject areas

    • Physics and Astronomy(all)

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