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Title: Structural rejuvenation in bulk metallic glasses

Abstract

Using high-energy X-ray diffraction we study structural changes in bulk metallic glasses after uniaxial compressive homogeneous deformation at temperatures slightly below the glass transition. We observe that deformation results in structural disordering corresponding to an increase in the fictive, or effective, temperature. However, the structural disordering saturates after yielding. Lastly, examination of the experimental structure and molecular dynamics simulation suggests that local changes in the atomic connectivity network are the main driving force of the structural rejuvenation.

Authors:
 [1];  [1];  [1];  [2];  [3];  [4]
  1. Univ. of Tennessee, Knoxville, TN (United States)
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  3. Tohoku Univ., Sendai (Japan)
  4. Univ. of Tennessee, Knoxville, TN (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1185837
Alternate Identifier(s):
OSTI ID: 1318774
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Accepted Manuscript
Journal Name:
Acta Materialia
Additional Journal Information:
Journal Volume: 86; Journal ID: ISSN 1359-6454
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; bulk metallic glasses; structure; rejuvenation; creep; X-ray diffraction

Citation Formats

Tong, Yang, Iwashita, T., Dmowski, Wojciech, Bei, Hongbin, Yokoyama, Y., and Egami, Takeshi. Structural rejuvenation in bulk metallic glasses. United States: N. p., 2015. Web. doi:10.1016/j.actamat.2014.12.020.
Tong, Yang, Iwashita, T., Dmowski, Wojciech, Bei, Hongbin, Yokoyama, Y., & Egami, Takeshi. Structural rejuvenation in bulk metallic glasses. United States. doi:10.1016/j.actamat.2014.12.020.
Tong, Yang, Iwashita, T., Dmowski, Wojciech, Bei, Hongbin, Yokoyama, Y., and Egami, Takeshi. Mon . "Structural rejuvenation in bulk metallic glasses". United States. doi:10.1016/j.actamat.2014.12.020. https://www.osti.gov/servlets/purl/1185837.
@article{osti_1185837,
title = {Structural rejuvenation in bulk metallic glasses},
author = {Tong, Yang and Iwashita, T. and Dmowski, Wojciech and Bei, Hongbin and Yokoyama, Y. and Egami, Takeshi},
abstractNote = {Using high-energy X-ray diffraction we study structural changes in bulk metallic glasses after uniaxial compressive homogeneous deformation at temperatures slightly below the glass transition. We observe that deformation results in structural disordering corresponding to an increase in the fictive, or effective, temperature. However, the structural disordering saturates after yielding. Lastly, examination of the experimental structure and molecular dynamics simulation suggests that local changes in the atomic connectivity network are the main driving force of the structural rejuvenation.},
doi = {10.1016/j.actamat.2014.12.020},
journal = {Acta Materialia},
number = ,
volume = 86,
place = {United States},
year = {2015},
month = {1}
}

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Cited by: 18 works
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