The influence of complex thermal treatment on mechanical properties of amorphous materials

Abstract

We study the effect of periodic, spatially uniform temperature variation on mechanical properties and structural relaxation of amorphous alloys using molecular dynamics simulations. The disordered material is modeled via a non-additive binary mixture, which is annealed from the liquid to the glassy state with various cooling rates and then either aged at constant temperature or subjected to thermal treatment. We found that in comparison to aged samples, thermal cycling with respect to a reference temperature of approximately half the glass transition temperature leads to more relaxed states with lower levels of potential energy. The largest energy decrease was observed for rapidly quenched glasses cycled with the thermal amplitude slightly smaller than the reference temperature. Following the thermal treatment, the mechanical properties were probed via uniaxial tensile strain at the reference temperature and constant pressure. The numerical results indicate an inverse correlation between the levels of potential energy and values of the elastic modulus and yield stress as a function of the thermal amplitude.

25 pages, 12 figures

References in corpus (7)

• The effect of cryogenic thermal cycling on aging, rejuvenation, and mechanical properties of metallic glasses
• 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
• Slow relaxation dynamics in binary glasses during stress-controlled, tension-compression cyclic loading
• The potential energy states and mechanical properties of thermally cycled binary glasses

Cited by in corpus (16)

• Atomistic Modelling of Thermal-Cycling Rejuvenation in Metallic Glasses
• Aging and rejuvenation during elastostatic loading of amorphous alloys
• Accelerated relaxation in disordered solids under cyclic loading with alternating shear orientation
• 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
• 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
• Cooling under applied stress rejuvenates amorphous alloys and enhances their ductility
• Rejuvenation and memory effects in active glasses induced by thermal and active cycling
• Relaxation dynamics in amorphous alloys under asymmetric cyclic shear deformation
• Shear band healing in amorphous materials by small-amplitude oscillatory shear deformation
• Kinetics of Stacking Order Evolution During Heterogeneous Ice Formation