Shear band healing in amorphous materials by small-amplitude oscillatory shear deformation
arXiv:2010.00547 · doi:10.1016/j.jnoncrysol.2021.120874
Abstract
The effect of small-amplitude periodic shear on annealing of a shear band in binary glasses is investigated using molecular dynamics simulations. The shear band is first introduced in stable glasses via large-amplitude periodic shear, and then amorphous samples are subjected to repeated loading during thousands of cycles at strain amplitudes below the yield strain. It was found that with increasing strain amplitude, the glasses are relocated to deeper potential energy levels, while the energy change upon annealing is not affected by the glass initial stability. The results of mechanical tests indicate that the shear modulus and yield stress both increase towards plateau levels during the first few hundred cycles, and their magnitudes are largest when samples are loaded at strain amplitudes close to the yield strain. The analysis of nonaffine displacements reveals that the shear band breaks up into isolated clusters that gradually decay over time, leading to nearly reversible deformation within the elastic range. These results might be useful for mechanical processing of metallic glasses and additive manufacturing.
arXiv comment24 pages, 9 figures
References in corpus (40)
- Dynamics of Viscoplastic Deformation in Amorphous Solids
- Testing Mode-Coupling Theory for a Supercooled Binary Lennard-Jones Mixture I: The van Hove Correlation Function
- The yielding transition in amorphous solids under oscillatory shear deformation
- Oscillatory athermal quasi-static deformation of a model glass
- Onset of Irreversibility and Chaos in Amorphous Solids Under Periodic Shear
- Macroscopic yielding in jammed solids is accompanied by a non-equilibrium first-order transition in particle trajectories
- Glass stability changes the nature of yielding under oscillatory shear
- Heterogeneous relaxation dynamics in amorphous materials under cyclic loading
- Shear banding in metallic glasses described by alignments of Eshelby quadrupoles
- Strain localisation above the yielding point in cyclically deformed glasses
- Reversible plastic events during oscillatory deformation of amorphous solids
- Direct observation of percolation in the yielding transition of colloidal glasses
- Atomistic Modelling of Thermal-Cycling Rejuvenation in Metallic Glasses
- The effect of cryogenic thermal cycling on aging, rejuvenation, and mechanical properties of metallic glasses
- The effects of cooling rate on particle rearrangement statistics: Rapidly cooled glasses are more ductile and less reversible
- Brittle yielding of amorphous solids at finite shear rates
- Collective nonaffine displacements in amorphous materials during large-amplitude oscillatory shear
- Mechanical annealing of model glasses: Effects of strain amplitude and temperature
- Heterogeneous dynamics during yielding of glasses: effect of aging
- Correlations of non-affine displacements in metallic glasses through the yield transition
- Annealing glasses by cyclic shear deformation
- Dynamical heterogeneity in periodically deformed polymer glasses
- The yielding transition in periodically sheared binary glasses at finite temperature
- Nonaffine rearrangements of atoms in deformed and quiescent binary glasses
- Slow relaxation dynamics in binary glasses during stress-controlled, tension-compression cyclic loading
- Aging and rejuvenation during elastostatic loading of amorphous alloys
- Accelerated relaxation in disordered solids under cyclic loading with alternating shear orientation
- The influence of complex thermal treatment on mechanical properties of amorphous materials
- The effect of thermal history on the atomic structure and mechanical properties of amorphous alloys
- Atomistic modeling of heat treatment processes for tuning the mechanical properties of disordered solids
- Shear band formation in amorphous materials under oscillatory shear deformation
- The potential energy states and mechanical properties of thermally cycled binary glasses
- Accelerated rejuvenation in metallic glasses subjected to elastostatic compression along alternating directions
- Structural relaxation in amorphous materials under cyclic tension-compression loading
- Spatiotemporal analysis of nonaffine displacements in disordered solids sheared across the yielding point
- Alternating shear orientation during cyclic loading facilitates yielding in amorphous materials
- The influence of periodic shear on structural relaxation and pore redistribution in binary glasses
- Structural transformations during periodic deformation of low-porosity amorphous materials
- A delayed yielding transition in mechanically annealed binary glasses at finite temperature
- Thermodynamic Equivalence of Cyclic Shear and Deep Cooling in Glass-Formers