Abstract
A statistical analysis of the rate-dependent pop-in behavior during spherical nanoindentation of a metallic glass is presented. Since the first pop-in of a test corresponds to the initiation of plasticity, this method provides insights into the fundamentals of shear-banding behavior. In this study, test series with different applied loading rates reveal that the initiation of a shear band is thermally activated with a rate- and stress-dependent activation volume. We further find a spatial inhomogeneity of the elastic modulus at the micrometer scale. This long-range structural heterogeneity does not strongly correlate with the shear-band initiation stress.
Original language | English (US) |
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Article number | 171907 |
Journal | Applied Physics Letters |
Volume | 106 |
Issue number | 17 |
DOIs | |
State | Published - Apr 27 2015 |
Externally published | Yes |
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)