Shear band melting and serrated flow in metallic glasses

K. Georgarakis, M. Aljerf, Y. Li, A. Lemoulec, F. Charlot, A. R. Yavari, K. Chornokhvostenko, E. Tabachnikova, G. A. Evangelakis, D. B. Miracle, A. L. Greer, T. Zhang

    Research output: Contribution to journalArticlepeer-review

    98 Citations (Scopus)

    Abstract

    Scanning electron microscopy observations of shear steps on Zr-based bulk metallic glasses show direct evidence of shear band melting due to heat generated by elastic energy release. The estimated range of attained temperatures and the observed morphologies are consistent with shear steps forming at a subsonic speed limited by a required redistribution of local microscopic stresses. The calculations indicate that a 0.2 μm layer melts in the vicinity of a shear band forming a 1 μm shear step. The plastic part of the stress strain curve is serrated but a majority of shear events are not associated to serrations.

    Original languageEnglish
    Article number031907
    JournalApplied Physics Letters
    Volume93
    Issue number3
    DOIs
    Publication statusPublished - 2008 Aug 4

    ASJC Scopus subject areas

    • Physics and Astronomy (miscellaneous)

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