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

Xilei Bian | Zendy; guan wang | Zendy; K.C. Chan | Zendy; Jingli Ren | Zendy; Yulong Gao | Zendy; Qijie Zhai | Zendy

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

Author(s) -

Xilei Bian,

guan wang,

K.C. Chan,

Jingli Ren,

Yulong Gao,

Qijie Zhai

Publication year - 2013

Publication title -

applied physics letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.182

H-Index - 442

eISSN - 1077-3118

pISSN - 0003-6951

DOI - 10.1063/1.4820782

Subject(s) - materials science , nanoindentation , amorphous metal , strain rate , deformation (meteorology) , shear matrix , composite material , shear (geology) , metal , strain (injury) , nanoscopic scale , metallurgy , nanotechnology , medicine , alloy

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.Department of Industrial and Systems Engineerin

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