Shear avalanches in metallic glasses under nanoindentation: Deformation units and rate dependent strain burst cut-off

Journal Article · Mon Sep 02 00:00:00 EDT 2013 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4820782· OSTI ID:22217924

Bian, X. L.; Wang, G.; Gao, Y. L.; Zhai, Q. J. ^[1]; Chan, K. C. ^[2]; Ren, J. L. ^[3]

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1. Laboratory for Microstructures, Shanghai University, Shanghai 200444 (China)
2. Department of Industrial and System Engineering, the Hongkong Polytechnic University, Kowloon, Hong Kong (Hong Kong)
3. School of Mathematics and Statistics, Zhengzhou University, Zhengzhou 450001 (China)

Indented metallic glasses at the nanoscale deform via strain bursts. Conventional continuum descriptions are not appropriate for such highly stochastic, intermittent deformations. In this study, after a statistical analysis of strain bursts in five metallic glasses, the dependence of the cut-off of the strain burst size on deformation units and loading rate is established. For soft metallic glasses with smaller deformation units, cut-off of the strain burst size truncates the scale-free behavior at larger strain burst sizes. For hard metallic glasses, scale-free behavior occurs in a wide range of strain burst sizes.

• OSTI ID: 22217924
• Journal Information: Applied Physics Letters, Vol. 103, Issue 10; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

77 NANOSCIENCE AND NANOTECHNOLOGY
36 MATERIALS SCIENCE
GLASS
LOADING RATE
METALLIC GLASSES
NANOSTRUCTURES
SHEAR
STOCHASTIC PROCESSES
STRAINS