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Title: Crossover from localized to cascade relaxations in metallic glasses

Journal Article · · Physical Review Letters
 [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)

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.

Research Organization:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE Laboratory Directed Research and Development (LDRD) Program; USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1207060
Alternate ID(s):
OSTI ID: 1198711
Journal Information:
Physical Review Letters, Vol. 115, Issue 4; ISSN 0031-9007
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 77 works
Citation information provided by
Web of Science

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Cited By (14)

Effects of cooling rate on particle rearrangement statistics: Rapidly cooled glasses are more ductile and less reversible journal February 2017
Temperature dependent evolution of dynamic heterogeneity in metallic glass journal April 2017
Unveiling the structural arrangements responsible for the atomic dynamics in metallic glasses during physical aging journal January 2016
Connecting Local Yield Stresses with Plastic Activity in Amorphous Solids journal July 2016
Resistivity Saturation in Metallic Liquids Above a Dynamical Crossover Temperature Observed in Measurements Aboard the International Space Station journal November 2019
Glassy nature and glass-to-crystal transition in the binary metallic glass CuZr journal June 2017
Deformation and flow of amorphous solids: Insights from elastoplastic models journal December 2018
Particle rearrangement and softening contributions to the nonlinear mechanical response of glasses journal September 2017
Local yield stress statistics in model amorphous solids journal March 2018
Energy landscape-driven non-equilibrium evolution of inherent structure in disordered material journal May 2017
Mechanical avalanches promoted by magnetoelastic coupling in magnetic metallic glasses journal October 2018
Unveiling the structural arrangements responsible for the atomic dynamics in metallic glasses during physical aging text January 2015
The effects of cooling rate on particle rearrangement statistics: Rapidly cooled glasses are more ductile and less reversible text January 2016
Particle rearrangement and softening contributions to the nonlinear mechanical response of glasses text January 2017

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