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Title: Crossover from localized to cascade relaxations in metallic glasses

Abstract

Thermally activated deformation is investigated in two metallic glass systems with different cooling histories. By probing the atomic displacements and stress changes on the potential energy landscape, two deformation modes, a localized process and cascade process, have observed. The localized deformation involves fewer than 30 atoms and appears in both systems, and its size is invariant with cooling history. However, the cascade deformation is more frequently observed in the fast quenched system than in the slowly quenched system. As a result, the origin of the cascade process in the fast quenched system is attributed to the higher density of local minima on the underlying potential energy landscape.

Authors:
 [1];  [2];  [3]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  2. Univ. of Tennessee, Knoxville, TN (United States)
  3. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Univ. of Tennessee, Knoxville, TN (United States)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Laboratory Directed Research and Development (LDRD) Program; USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1207060
Alternate Identifier(s):
OSTI ID: 1198711
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 115; Journal Issue: 4; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS

Citation Formats

Fan, Yue, Iwashita, Takuya, and Egami, Takeshi. Crossover from localized to cascade relaxations in metallic glasses. United States: N. p., 2015. Web. doi:10.1103/PhysRevLett.115.045501.
Fan, Yue, Iwashita, Takuya, & Egami, Takeshi. Crossover from localized to cascade relaxations in metallic glasses. United States. https://doi.org/10.1103/PhysRevLett.115.045501
Fan, Yue, Iwashita, Takuya, and Egami, Takeshi. Tue . "Crossover from localized to cascade relaxations in metallic glasses". United States. https://doi.org/10.1103/PhysRevLett.115.045501. https://www.osti.gov/servlets/purl/1207060.
@article{osti_1207060,
title = {Crossover from localized to cascade relaxations in metallic glasses},
author = {Fan, Yue and Iwashita, Takuya and Egami, Takeshi},
abstractNote = {Thermally activated deformation is investigated in two metallic glass systems with different cooling histories. By probing the atomic displacements and stress changes on the potential energy landscape, two deformation modes, a localized process and cascade process, have observed. The localized deformation involves fewer than 30 atoms and appears in both systems, and its size is invariant with cooling history. However, the cascade deformation is more frequently observed in the fast quenched system than in the slowly quenched system. As a result, the origin of the cascade process in the fast quenched system is attributed to the higher density of local minima on the underlying potential energy landscape.},
doi = {10.1103/PhysRevLett.115.045501},
journal = {Physical Review Letters},
number = 4,
volume = 115,
place = {United States},
year = {Tue Jul 21 00:00:00 EDT 2015},
month = {Tue Jul 21 00:00:00 EDT 2015}
}

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Cited by: 77 works
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