Mechanical annealing of model glasses: Effects of strain amplitude and temperature

Abstract

Molecular dynamics simulations are performed to examine the dynamic response of amorphous solids to oscillatory shear at finite temperatures. The data were collected from a poorly annealed binary glass, which was deformed periodically in the elastic regime during several hundred shear cycles. We found that the characteristic time required to reach a steady state with a minimum potential energy is longer at higher temperatures and larger strain amplitudes. With decreasing strain amplitude, the asymptotic value of the potential energy increases but it remains lower than in quiescent samples. The transient decay of the potential energy correlates well with a gradual decrease in the volume occupied by atoms with large nonaffine displacements. By contrast, the maximum amplitude of shear stress oscillations is attained relatively quickly when a large part of the system starts to deform reversibly.

22 pages, 10 figures

References in corpus (4)

• A microscopic view of the yielding transition in concentrated emulsions
• The effects of cooling rate on particle rearrangement statistics: Rapidly cooled glasses are more ductile and less reversible
• Collective nonaffine displacements in amorphous materials during large-amplitude oscillatory shear
• Nonaffine rearrangements of atoms in deformed and quiescent binary glasses

Cited by in corpus (18)

• Glass stability changes the nature of yielding under oscillatory shear
• Aging and rejuvenation during elastostatic loading of amorphous alloys
• Shear band formation in amorphous materials under oscillatory shear deformation
• Atomistic modeling of heat treatment processes for tuning the mechanical properties of disordered solids
• Spatiotemporal analysis of nonaffine displacements in disordered solids sheared across the yielding point
• Stable glassy configurations of the Kob-Andersen model using swap Monte Carlo
• Accelerated rejuvenation in metallic glasses subjected to elastostatic compression along alternating directions
• Structural relaxation in amorphous materials under cyclic tension-compression loading
• Accessing a broader range of energy states in metallic glasses by variable-amplitude oscillatory shear
• Alternating shear orientation during cyclic loading facilitates yielding in amorphous materials
• A delayed yielding transition in mechanically annealed binary glasses at finite temperature
• Fatigue behavior of Cu-Zr metallic glasses under cyclic loading
• Cooling under applied stress rejuvenates amorphous alloys and enhances their ductility
• Compressing and forecasting atomic material simulations with descriptors
• Relaxation dynamics in amorphous alloys under asymmetric cyclic shear deformation
• Fatigue failure of amorphous alloys under cyclic shear deformation
• Shear band healing in amorphous materials by small-amplitude oscillatory shear deformation
• Computational Methods toward Ultrastable Glasses