Accelerated rejuvenation in metallic glasses subjected to elastostatic compression along alternating directions

Abstract

The influence of static stress and alternating loading direction on the potential energy and mechanical properties of amorphous alloys is investigated using molecular dynamics simulations. The model glass is represented via a binary mixture which is first slowly annealed well below the glass transition temperature and then subjected to elastostatic loading either along a single direction or along two and three alternating directions. We find that at sufficiently large values of the static stress, the binary glass becomes rejuvenated via collective, irreversible rearrangements of atoms. Upon including additional orientation of the static stress in the loading protocol, the rejuvenation effect is amplified and the typical size of clusters of atoms with large nonaffine displacements increases. As a result of prolonged mechanical loading, the elastic modulus and the peak value of the stress overshoot during startup continuous compression become significantly reduced, especially for loading protocols with alternating stress orientation. These findings are important for the design of novel processing methods to improve mechanical properties of metallic glasses.

arXiv comment22 pages, 8 figures

References in corpus (31)

• 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
• Heterogeneous relaxation dynamics in amorphous materials under cyclic loading
• Strain localisation above the yielding point in cyclically deformed glasses
• Reversible plastic events during oscillatory deformation of amorphous solids
• The effect of cryogenic thermal cycling on aging, rejuvenation, and mechanical properties of metallic glasses
• Theory of pressure-induced rejuvenation and strain-hardening in metallic glasses
• 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
• The yielding transition in periodically sheared binary glasses at finite temperature
• Nonaffine rearrangements of atoms in deformed and quiescent binary glasses
• Dynamical heterogeneity in periodically deformed polymer 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
• Shear band formation in amorphous materials under oscillatory shear deformation
• Atomistic modeling of heat treatment processes for tuning the mechanical properties of disordered solids
• The potential energy states and mechanical properties of thermally cycled binary glasses
• Spatiotemporal analysis of nonaffine displacements in disordered solids sheared across the yielding point
• Structural relaxation in amorphous materials under cyclic tension-compression loading
• 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

Cited by in corpus (4)

• Accessing a broader range of energy states in metallic glasses by variable-amplitude oscillatory shear
• Cooling under applied stress rejuvenates amorphous alloys and enhances their ductility
• Relaxation dynamics in amorphous alloys under asymmetric cyclic shear deformation
• Shear band healing in amorphous materials by small-amplitude oscillatory shear deformation