Radiation damage in nanostructured materials

X Zhang, K Hattar, Y Chen, L Shao, J Li, C Sun… - Progress in Materials …, 2018 - Elsevier
Materials subjected to high dose irradiation by energetic particles often experience severe
damage in the form of drastic increase of defect density, and significant degradation of their …

Four-dimensional scanning transmission electron microscopy (4D-STEM): From scanning nanodiffraction to ptychography and beyond

C Ophus - Microscopy and Microanalysis, 2019 - cambridge.org
Scanning transmission electron microscopy (STEM) is widely used for imaging, diffraction,
and spectroscopy of materials down to atomic resolution. Recent advances in detector …

Interplay between grain boundaries and radiation damage

CM Barr, O El-Atwani, D Kaoumi, K Hattar - JOM, 2019 - Springer
The need for enhanced radiation-tolerant materials for advanced nuclear energy designs
has resulted in a growing number of investigations that have explored the effect of grain …

Irradiation-induced grain boundary facet motion: In situ observations and atomic-scale mechanisms

CM Barr, EY Chen, JE Nathaniel, P Lu, DP Adams… - Science …, 2022 - science.org
Metals subjected to irradiation environments undergo microstructural evolution and
concomitant degradation, yet the nanoscale mechanisms for such evolution remain elusive …

Thermal stability and irradiation response of nanocrystalline CoCrCuFeNi high-entropy alloy

Y Zhang, MA Tunes, ML Crespillo, F Zhang… - …, 2019 - iopscience.iop.org
Grain growth and phase stability of a nanocrystalline face-centered cubic (fcc) Ni 0.2 Fe 0.2
Co 0.2 Cr 0.2 Cu 0.2 high-entropy alloy (HEA), either thermally-or irradiation-induced, are …

Suppressing irradiation induced grain growth and defect accumulation in nanocrystalline tungsten through grain boundary doping

WS Cunningham, K Hattar, Y Zhu, DJ Edwards… - Acta Materialia, 2021 - Elsevier
Deliberately designed nanostructured materials containing a high density of dopant
stabilized interfaces provide energetically favorable sites for the annihilation of defects that …

Irradiation‐induced extremes create hierarchical face‐/body‐centered‐cubic phases in nanostructured high entropy alloys

L Jiang, YJ Hu, K Sun, P Xiu, M Song… - Advanced …, 2020 - Wiley Online Library
A nanoscale hierarchical dual‐phase structure is reported to form in a nanocrystalline
NiFeCoCrCu high‐entropy‐alloy (HEA) film via ion irradiation. Under the extreme energy …

Direct observation of grain-boundary-migration-assisted radiation damage healing in ultrafine grained gold under mechanical stress

S Stangebye, K Ding, Y Zhang, E Lang, K Hattar… - Nano Letters, 2023 - ACS Publications
Nanostructured metals are a promising class of radiation-tolerant materials. A large volume
fraction of grain boundaries (GBs) can provide plenty of sinks for radiation damage, and …

High cycle fatigue in the transmission electron microscope

DC Bufford, D Stauffer, WM Mook, SA Syed Asif… - Nano …, 2016 - ACS Publications
One of the most common causes of structural failure in metals is fatigue induced by cyclic
loading. Historically, microstructure-level analysis of fatigue cracks has primarily been …

[HTML][HTML] Athermal evolution of nanocrystalline tungsten driven by irradiation

PW Ma, DR Mason, S Van Boxel, SL Dudarev - Journal of Nuclear …, 2023 - Elsevier
Radiation effects in nanocrystalline tungsten are simulated in the athermal high dose limit,
where microstructural evolution is driven not by the thermally activated diffusion of radiation …