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

doi:10.1063/1.2956666

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 journal › Article › peer-review

108 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 language	English
Article number	031907
Journal	Applied Physics Letters
Volume	93
Issue number	3
DOIs	https://doi.org/10.1063/1.2956666
Publication status	Published - 2008 Aug 4

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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title = "Shear band melting and serrated flow in metallic glasses",

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.",

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AU - Georgarakis, K.

AU - Aljerf, M.

AU - Li, Y.

AU - Lemoulec, A.

AU - Charlot, F.

AU - Yavari, A. R.

AU - Chornokhvostenko, K.

AU - Tabachnikova, E.

AU - Evangelakis, G. A.

AU - Miracle, D. B.

AU - Greer, A. L.

AU - Zhang, T.

PY - 2008/8/4

Y1 - 2008/8/4

N2 - 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.

AB - 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.

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Shear band melting and serrated flow in metallic glasses

Abstract

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