Kinetic and structural fragility—a correlation between structures and dynamics in metallic liquids and glasses

KF Kelton - Journal of Physics: Condensed Matter, 2016 - iopscience.iop.org
The liquid phase remains poorly understood. In many cases, the densities of liquids and
their crystallized solid phases are similar, but since they are amorphous they lack the spatial …

Atomic-Scale Relaxation Dynamics and Aging in a Metallic Glass Probed<? format?> by X-Ray Photon Correlation Spectroscopy

B Ruta, Y Chushkin, G Monaco, L Cipelletti, E Pineda… - Physical review …, 2012 - APS
We use x-ray photon correlation spectroscopy to investigate the structural relaxation process
in a metallic glass on the atomic length scale. We report evidence for a dynamical crossover …

Mechanical glass transition revealed by the fracture toughness of metallic glasses

J Ketkaew, W Chen, H Wang, A Datye, M Fan… - Nature …, 2018 - nature.com
The fracture toughness of glassy materials remains poorly understood. In large part, this is
due to the disordered, intrinsically non-equilibrium nature of the glass structure, which …

Toughness enhancement and heterogeneous softening of a cryogenically cycled Zr–Cu–Ni–Al–Nb bulk metallic glass

BS Li, S Xie, JJ Kruzic - Acta Materialia, 2019 - Elsevier
In this study, as-cast and cold-rolled Zr 63.78 Cu 14.72 Ni 10 Al 10 Nb 1.5 bulk metallic glass
(BMG) samples were subjected to 20, 70, 120, and 170 cryogenic thermal cycles prior to …

Evolution of shear bands, free volume and hardness during cold rolling of a Zr-based bulk metallic glass

M Stolpe, JJ Kruzic, R Busch - Acta materialia, 2014 - Elsevier
Two-dimensional cold rolling was performed on a bulk metallic glass (BMG) with
composition Zr 58.5 Cu 15.6 Ni 12.8 Al 10.3 Nb 2.8. The average shear band density …

High temperature melt viscosity and fragile to strong transition in Zr–Cu–Ni–Al–Nb (Ti) and Cu47Ti34Zr11Ni8 bulk metallic glasses

Z Evenson, T Schmitt, M Nicola, I Gallino, R Busch - Acta materialia, 2012 - Elsevier
The molten viscous behavior of Vitreloy 106, 106a, 105 and 101 bulk metallic glass-forming
alloys was investigated at temperatures above Tliq. Couette concentric cylinder viscometry …

[HTML][HTML] Improving plasticity of metallic glass by electropulsing-assisted surface severe plastic deformation

C Ma, S Suslov, C Ye, Y Dong - Materials & Design, 2019 - Elsevier
Using either electropulsing (EP) or surface severe plastic deformation (SSPD) to process
metallic glasses can improve their plasticity, however, the moderate improvement in …

Elevating the fracture toughness of Cu49Hf42Al9 bulk metallic glass: Effects of cooling rate and frozen-in excess volume

ZD Zhu, E Ma, J Xu - Intermetallics, 2014 - Elsevier
A major challenge for the structural applications of bulk metallic glasses (BMGs) is to
improve their fracture toughness. Here we demonstrate that by increasing the cooling rate …

Evolution of residual stress, free volume, and hardness in the laser shock peened Ti-based metallic glass

L Wang, L Wang, Z Nie, Y Ren, Y Xue, R Zhu… - Materials & Design, 2016 - Elsevier
Laser shock peening (LSP) with different cycles was performed on the Ti-based bulk metallic
glasses (BMGs). The sub-surface residual stress of the LSPed specimens was measured by …

Role of pre-existing shear band morphology in controlling the fracture behavior of a Zr–Ti–Cu–Ni–Al bulk metallic glass

B Li, S Scudino, B Gludovatz, JJ Kruzic - Materials Science and …, 2020 - Elsevier
Shear bands were introduced into a Zr–Ti–Cu–Ni–Al bulk metallic glass (BMG) by one-
directional cold rolling and the effect on fracture toughness anisotropy was examined. Two …