Revealing localized plastic flow in apparent elastic region before yielding in metallic glasses

被引：24

作者：

Zhao, L. Z. ^{[1
]}

Xue, R. J. ^{[1
]}

Li, Y. Z. ^{[1
]}

Wang, W. H. ^{[1
]}

Bai, H. Y. ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China

来源：

JOURNAL OF APPLIED PHYSICS | 2015年 / 118卷 / 24期

关键词：

INELASTIC DEFORMATION; SUPERCOOLED LIQUIDS; STRESS-RELAXATION; ENERGY SPECTRA; SHEAR BANDS; TRANSITION; DYNAMICS; ALLOYS;

D O I：

10.1063/1.4938567

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The microscopically localized flow before yielding in metallic glass (MG) is hard to be detected using conventional mechanical tests due to its extremely slow process with a long time scale and lack of structural information. We present a stress relaxation approach to circumvent the experimental problem and to reveal the evolution of the flow before yielding in MG by detecting the evolution of structural heterogeneity and activation energy barrier spectra of flow units. We report on explicit correlations among dynamical heterogeneities, nanoscale flow units, and yielding, revealing a transition from the microscopically flow to macroscopic yielding in MG. (C) 2015 AIP Publishing LLC.

引用

页数：5

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