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

被引：55

作者：

Bian, X. L. ^{[1
]}

Wang, G. ^{[1
]}

Chan, K. C. ^{[2
]}

Ren, J. L. ^{[3
]}

Gao, Y. L. ^{[1
]}

Zhai, Q. J. ^{[1
]}

机构：

[1] Shanghai Univ, Lab Microstruct, Shanghai 200444, Peoples R China

[2] Hongkong Polytech Univ, Dept Ind & Syst Engn, Kowloon, Hong Kong, Peoples R China

[3] Zhengzhou Univ, Sch Math & Stat, Zhengzhou 450001, Peoples R China

来源：

APPLIED PHYSICS LETTERS | 2013年 / 103卷 / 10期

关键词：

CRYSTAL PLASTICITY; SERRATED FLOW; TEMPERATURE; DYNAMICS; STRESS; ZONES; SLIP;

D O I：

10.1063/1.4820782

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

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. (C) 2013 AIP Publishing LLC.

引用

页数：4

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