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Title: Tuned critical avalanche scaling in bulk metallic glasses

In this study, ingots of the bulk metallic glass (BMG), Zr 64.13Cu 15.75Ni 10.12Al 10 in atomic percent (at. %), are compressed at slow strain rates. The deformation behavior is characterized by discrete, jerky stress-drop bursts (serrations). Here we present a quantitative theory for the serration behavior of BMGs, which is a critical issue for the understanding of the deformation characteristics of BMGs. The mean-field interaction model predicts the scaling behavior of the distribution, D(S), of avalanche sizes, S, in the experiments. D(S) follows a power law multiplied by an exponentially-decaying scaling function. The size of the largest observed avalanche depends on experimental tuning-parameters, such as either imposed strain rate or stress. Similar to crystalline materials, the plasticity of BMGs reflects tuned criticality showing remarkable quantitative agreement with the slip statistics of slowly-compressed nanocrystals. The results imply that material-evaluation methods based on slip statistics apply to both crystalline and BMG materials.
Authors:
 [1] ;  [2] ;  [1] ;  [1] ;  [3] ;  [4] ;  [2] ;  [1] ;  [1]
  1. Univ. of Illinois Urbana-Champaign, Champaign, IL (United States)
  2. Univ. of Tennessee, Knoxville, TN (United States)
  3. Taiyuan Univ. of Technology, Taiyuan (China)
  4. Univ. of Science and Technology, Beijing (China)
Publication Date:
Grant/Contract Number:
FE0011194
Type:
Accepted Manuscript
Journal Name:
Scientific Reports
Additional Journal Information:
Journal Volume: 4; Journal ID: ISSN 2045-2322
Publisher:
Nature Publishing Group
Research Org:
Univ. of Tennessee, Knoxville, TN (United States); Univ. of Illinois Urbana-Champaign, Champaign, IL (United States)
Sponsoring Org:
USDOE Office of Fossil Energy (FE)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; mechanical properties; metals and alloys; nonlinear phenomena; phase transitions and critical phenomena
OSTI Identifier:
1224526

Antonaglia, James, Xie, Xie, Schwarz, Gregory, Wraith, Matthew, Qiao, Junwei, Zhang, Yong, Liaw, Peter K., Uhl, Jonathan T., and Dahmen, Karin A.. Tuned critical avalanche scaling in bulk metallic glasses. United States: N. p., Web. doi:10.1038/srep04382.
Antonaglia, James, Xie, Xie, Schwarz, Gregory, Wraith, Matthew, Qiao, Junwei, Zhang, Yong, Liaw, Peter K., Uhl, Jonathan T., & Dahmen, Karin A.. Tuned critical avalanche scaling in bulk metallic glasses. United States. doi:10.1038/srep04382.
Antonaglia, James, Xie, Xie, Schwarz, Gregory, Wraith, Matthew, Qiao, Junwei, Zhang, Yong, Liaw, Peter K., Uhl, Jonathan T., and Dahmen, Karin A.. 2014. "Tuned critical avalanche scaling in bulk metallic glasses". United States. doi:10.1038/srep04382. https://www.osti.gov/servlets/purl/1224526.
@article{osti_1224526,
title = {Tuned critical avalanche scaling in bulk metallic glasses},
author = {Antonaglia, James and Xie, Xie and Schwarz, Gregory and Wraith, Matthew and Qiao, Junwei and Zhang, Yong and Liaw, Peter K. and Uhl, Jonathan T. and Dahmen, Karin A.},
abstractNote = {In this study, ingots of the bulk metallic glass (BMG), Zr64.13Cu15.75Ni10.12Al10 in atomic percent (at. %), are compressed at slow strain rates. The deformation behavior is characterized by discrete, jerky stress-drop bursts (serrations). Here we present a quantitative theory for the serration behavior of BMGs, which is a critical issue for the understanding of the deformation characteristics of BMGs. The mean-field interaction model predicts the scaling behavior of the distribution, D(S), of avalanche sizes, S, in the experiments. D(S) follows a power law multiplied by an exponentially-decaying scaling function. The size of the largest observed avalanche depends on experimental tuning-parameters, such as either imposed strain rate or stress. Similar to crystalline materials, the plasticity of BMGs reflects tuned criticality showing remarkable quantitative agreement with the slip statistics of slowly-compressed nanocrystals. The results imply that material-evaluation methods based on slip statistics apply to both crystalline and BMG materials.},
doi = {10.1038/srep04382},
journal = {Scientific Reports},
number = ,
volume = 4,
place = {United States},
year = {2014},
month = {3}
}