Extreme rejuvenation and softening in a bulk metallic glass

J. Pan; Y. X. Wang; Q. Guo; D. Zhang; A. L. Greer

doi:10.1038/s41467-018-02943-4

journal article Open Access Feb 08, 2018

Extreme rejuvenation and softening in a bulk metallic glass

J. Pan

Nature Communications Vol. 9 No. 1 · Springer Science and Business Media LLC

View at Publisher Save 10.1038/s41467-018-02943-4

Abstract

AbstractRejuvenation of metallic glasses, bringing them to higher-energy states, is of interest in improving their plasticity. The mechanisms of rejuvenation are poorly understood, and its limits remain unexplored. We use constrained loading in compression to impose substantial plastic flow on a zirconium-based bulk metallic glass. The maximum measured effects are that the hardness of the glass decreases by 36%, and its excess enthalpy (above the relaxed state) increases to 41% of the enthalpy of melting. Comparably high degrees of rejuvenation have been reported only on microscopic scales at the centre of shear bands confined to low volume fractions. This extreme rejuvenation of a bulk glass gives a state equivalent to that obtainable by quenching the liquid at ~1010 K s–1, many orders of magnitude faster than is possible for bulk specimens. The contrast with earlier results showing relaxation in similar tests under tension emphasizes the importance of hydrostatic stress.

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References

Details

Published: Feb 08, 2018
Vol/Issue: 9(1)
License: View

Authors

Yale University

Rensselaer Polytechnic Institute, Troy, New York 12180

Beihang University

Cite This Article

J. Pan, Y. X. Wang, Q. Guo, et al. (2018). Extreme rejuvenation and softening in a bulk metallic glass. Nature Communications, 9(1). https://doi.org/10.1038/s41467-018-02943-4

Extreme rejuvenation and softening in a bulk metallic glass

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