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Title: Mechanical rejuvenation in bulk metallic glass induced by thermo-mechanical creep

Abstract

Using high energy X-ray diffraction we studied the temperature, stress, and time effect on structural changes in a Zr-based bulk metallic glass induced by thermo-mechanical creep. Pair distribution functions obtained from two-dimensional diffraction patterns show that thermo-mechanical creep induces structural disordering, but only when the stress beyond a threshold is applied. A similar threshold behavior was observed for anelastic strain. We conclude that anelastic creep strain induces rejuvenation, whereas plastic strain does not.

Authors:
 [1];  [1]; ORCiD logo [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), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1429195
Alternate Identifier(s):
OSTI ID: 1496400
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Accepted Manuscript
Journal Name:
Acta Materialia
Additional Journal Information:
Journal Volume: 148; Journal Issue: C; Journal ID: ISSN 1359-6454
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Tong, Yang, Dmowski, W., Bei, Hongbin, Yokoyama, Y., and Egami, Takeshi. Mechanical rejuvenation in bulk metallic glass induced by thermo-mechanical creep. United States: N. p., 2018. Web. doi:10.1016/j.actamat.2018.02.019.
Tong, Yang, Dmowski, W., Bei, Hongbin, Yokoyama, Y., & Egami, Takeshi. Mechanical rejuvenation in bulk metallic glass induced by thermo-mechanical creep. United States. doi:10.1016/j.actamat.2018.02.019.
Tong, Yang, Dmowski, W., Bei, Hongbin, Yokoyama, Y., and Egami, Takeshi. Fri . "Mechanical rejuvenation in bulk metallic glass induced by thermo-mechanical creep". United States. doi:10.1016/j.actamat.2018.02.019. https://www.osti.gov/servlets/purl/1429195.
@article{osti_1429195,
title = {Mechanical rejuvenation in bulk metallic glass induced by thermo-mechanical creep},
author = {Tong, Yang and Dmowski, W. and Bei, Hongbin and Yokoyama, Y. and Egami, Takeshi},
abstractNote = {Using high energy X-ray diffraction we studied the temperature, stress, and time effect on structural changes in a Zr-based bulk metallic glass induced by thermo-mechanical creep. Pair distribution functions obtained from two-dimensional diffraction patterns show that thermo-mechanical creep induces structural disordering, but only when the stress beyond a threshold is applied. A similar threshold behavior was observed for anelastic strain. We conclude that anelastic creep strain induces rejuvenation, whereas plastic strain does not.},
doi = {10.1016/j.actamat.2018.02.019},
journal = {Acta Materialia},
number = C,
volume = 148,
place = {United States},
year = {2018},
month = {2}
}

Journal Article:
Free Publicly Available Full Text
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Citation Metrics:
Cited by: 18 works
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Figures / Tables:

Figure 1 Figure 1: Effect of thermo-creep temperature on PDFs. Notice that the PDF measurements were conducted at room temperature on the samples after thermo-creep. The difference plot of G$^{0}_{0}$(𝑟) between the crept states and initial annealed state at the bottom is magnified by 15 times.

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Works referencing / citing this record:

Restoration of the structure of amorphous and partially crystalline alloys using cryogenic thermocycling
journal, November 2019


Restoration of the structure of amorphous and partially crystalline alloys using cryogenic thermocycling
journal, November 2019


    Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.