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

Thermal rejuvenation in metallic glasses

Structural rejuvenation in metallic glasses by a thermal process (i.e. through recovery annealing) was investigated experimentally and theoretically for various alloy compositions. An increase in the potential energy, a decrease in the density, and a change in the local structure as well as mechanical softening were observed after thermal rejuvenation. Two parameters, one related to the anneali...

Microstructure of fragile metallic glasses inferred from ultrasound-accelerated crystallization in Pd-based metallic glasses.

By utilizing ultrasonic annealing at a temperature below (or near) the glass transition temperature Tg, we revealed a microstructural pattern of a partially crystallized Pd-based metallic glass with a high-resolution electron microscopy. On the basis of the observed microstructure, we inferred a plausible microstructural model of fragile metallic glasses composed of strongly bonded regions surr...

Atomic structure of Cu–Zr–Ti metallic glasses subjected to high temperature annealing

An influence of high temperature annealing process (before crystallization) on the atomic structure of two different as-prepared ribbon Cu–Zr–Ti metallic glasses (Cu60Zr20Ti20 and Cu55Zr16Ti29, at. %) was experimentally studied by means of differential scanning calorimetry and in situ hard X-ray diffraction. Results of our experiments prove different atomic structure and behaviour of the glasse...

Superconductivity in Metallic Glasses

Free Volume Contributing to the Different Yield Behaviors between Tension and Compression Deformations in Metallic Glasses

The different deformation behaviors in the yield stage, in particular, of metallic glasses under uniaxial tension and compression are investigated from an atomic structural perspective, by applying both experimental and simulation methods. A new computational approach for quantitatively calculating free volumes (FVs) in structural models is developed, based on which the manner in which FVs cont...