Materials under extreme conditions using large X-ray facilities

S Pascarelli, M McMahon, C Pépin, O Mathon… - Nature Reviews …, 2023 - nature.com
Active research is ongoing that investigates the properties of matter under extreme pressure.
Such condensed matter is found inside planets at millions of atmospheres and thousands of …

[HTML][HTML] A comparative review of time-resolved x-ray and electron scattering to probe structural dynamics

Y Lee, KY Oang, D Kim, H Ihee - Structural Dynamics, 2024 - pubs.aip.org
The structure of molecules, particularly the dynamic changes in structure, plays an essential
role in understanding physical and chemical phenomena. Time-resolved (TR) scattering …

Automated classification of big X-ray diffraction data using deep learning models

JE Salgado, S Lerman, Z Du, C Xu… - npj Computational …, 2023 - nature.com
In current in situ X-ray diffraction (XRD) techniques, data generation surpasses human
analytical capabilities, potentially leading to the loss of insights. Automated techniques …

Dynamic tensile fracture of iron: Molecular dynamics simulations and micromechanical model based on dislocation plasticity

VV Pogorelko, AE Mayer - International Journal of Plasticity, 2023 - Elsevier
Molecular dynamics (MD) shows a difference in the mechanisms of fracture of iron under
uniaxial and isotropic tension. Uniaxial tension leads to the formation of a complex …

Quasiplastic deformation in shocked nanocrystalline boron carbide: Grain boundary sliding and local amorphization

J Li, Q An - Journal of the European Ceramic Society, 2023 - Elsevier
Materials respond to shock in many ways such as plastic flow in metals and amorphization
in ceramics. It is very challenging to characterize the deformation mechanisms of ceramics …

Ultrafast radiographic imaging and tracking: An overview of instruments, methods, data, and applications

Z Wang, AFT Leong, A Dragone, AE Gleason… - Nuclear Instruments and …, 2023 - Elsevier
Ultrafast radiographic imaging and tracking (U-RadIT) use state-of-the-art ionizing particle
and light sources to experimentally study sub-nanosecond transients or dynamic processes …

Metric-affine effects in crystallization processes of white dwarfs

S Kalita, L Sarmah, A Wojnar - Physical Review D, 2023 - APS
We analyze the effects of modified gravity on specific heats of electrons and ions, Debye
temperature, crystallization process, and cooling mechanism in white dwarfs. We derive the …

A coupled phase-field and crystal plasticity model for understanding shock-induced phase transition of iron

S Yao, J Yu, X Pei, Y Cui, H Zhang, H Peng, Y Li… - International Journal of …, 2024 - Elsevier
In the current work, we propose a chemical-potential-based phase-field model coupled with
dynamic crystal plasticity based on a unified energy framework with the aim of …

Planetary seismology as a test of modified gravity proposals

A Kozak, A Wojnar - Physical Review D, 2023 - APS
We demonstrate that it is possible to test models of gravity, such as Palatini f (R) and
Eddington-inspired Born-Infeld models, using seismic data from Earth. By incorporating …

A spall and diffraction study of nanosecond pressure release across the iron ε-α phase boundary

G Righi, R Briggs, OR Deluigi, CV Stan, S Singh… - Acta Materialia, 2023 - Elsevier
The extreme response of polycrystalline iron at high pressures and high strain rates is
revealed by means of high-power laser pulses. The compression portion of the pulse …