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Title: Probing elastically or plastically induced structural heterogeneities in bulk metallic glasses by nanoindentation pop-in tests

Abstract

Shear banding dynamics in bulk metallic glasses (BMGs) is manifested by the spatiotemporal evolution of strain fields which in turn depend on structural heterogeneities. The spacing of these heterogeneities, as a characteristic length scale, was determined from the analysis of nanoindentation pop-in tests using a stochastic model. Furthermore, the pre-stress by elastic bending and residual stress by plastic bending of BMG plates were found to dramatically decrease such spacings, thus increasing heterogeneity density and mechanically rejuvenating the glass structure.

Authors:
 [1];  [2]; ORCiD logo [3]
  1. Univ. of Tennessee, Knoxville, TN (United States). Dept. of Materials Science and Engineering
  2. Univ. of Tennessee, Knoxville, TN (United States). Dept. of Materials Science and Engineering; Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Science and Technology Div.
  3. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Science and Technology Div.
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1376437
Alternate Identifier(s):
OSTI ID: 1375664
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Accepted Manuscript
Journal Name:
AIP Advances
Additional Journal Information:
Journal Volume: 7; Journal Issue: 8; Journal ID: ISSN 2158-3226
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Liu, Tingkun, Gao, Yanfei, and Bei, Hongbin. Probing elastically or plastically induced structural heterogeneities in bulk metallic glasses by nanoindentation pop-in tests. United States: N. p., 2017. Web. doi:10.1063/1.4993719.
Liu, Tingkun, Gao, Yanfei, & Bei, Hongbin. Probing elastically or plastically induced structural heterogeneities in bulk metallic glasses by nanoindentation pop-in tests. United States. doi:10.1063/1.4993719.
Liu, Tingkun, Gao, Yanfei, and Bei, Hongbin. Fri . "Probing elastically or plastically induced structural heterogeneities in bulk metallic glasses by nanoindentation pop-in tests". United States. doi:10.1063/1.4993719. https://www.osti.gov/servlets/purl/1376437.
@article{osti_1376437,
title = {Probing elastically or plastically induced structural heterogeneities in bulk metallic glasses by nanoindentation pop-in tests},
author = {Liu, Tingkun and Gao, Yanfei and Bei, Hongbin},
abstractNote = {Shear banding dynamics in bulk metallic glasses (BMGs) is manifested by the spatiotemporal evolution of strain fields which in turn depend on structural heterogeneities. The spacing of these heterogeneities, as a characteristic length scale, was determined from the analysis of nanoindentation pop-in tests using a stochastic model. Furthermore, the pre-stress by elastic bending and residual stress by plastic bending of BMG plates were found to dramatically decrease such spacings, thus increasing heterogeneity density and mechanically rejuvenating the glass structure.},
doi = {10.1063/1.4993719},
journal = {AIP Advances},
number = 8,
volume = 7,
place = {United States},
year = {2017},
month = {7}
}

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