A review of surface damage/microstructures and their effects on hydrogen/helium retention in tungsten

YG Li, QR Zheng, LM Wei, CG Zhang, Z Zeng - Tungsten, 2020 - Springer
The change in surface damage/microstructures and its effects on the hydrogen (H)
isotope/helium (He) dynamic behavior are the key factors for investigating issues of tungsten …

Preparation of ultrafine-grained/nanostructured tungsten materials: An overview

YC Wu, QQ Hou, LM Luo, X Zan, XY Zhu, P Li… - Journal of Alloys and …, 2019 - Elsevier
Tungsten has been considered as one of suitable candidate as plasma-facing material for
the first wall of fusion devices. However, the application of tungsten in fusion reactions …

Loop and void damage during heavy ion irradiation on nanocrystalline and coarse grained tungsten: Microstructure, effect of dpa rate, temperature, and grain size

O El-Atwani, E Esquivel, M Efe, E Aydogan, YQ Wang… - Acta Materialia, 2018 - Elsevier
Displacement damage, through heavy ion irradiation was studied on two tungsten grades
(coarse grained tungsten (CGW) and nanocrystalline and ultrafine grained tungsten (NCW)) …

In-situ TEM observation of the response of ultrafine-and nanocrystalline-grained tungsten to extreme irradiation environments

O El-Atwani, JA Hinks, G Greaves, S Gonderman… - Scientific reports, 2014 - nature.com
The accumulation of defects and in particular He bubbles, can have significant implications
for the performance of materials exposed to the plasma in magnetic-confinement nuclear …

Helium bubble formation in ultrafine and nanocrystalline tungsten under different extreme conditions

O El-Atwani, K Hattar, JA Hinks, G Greaves… - Journal of Nuclear …, 2015 - Elsevier
We have investigated the effects of helium ion irradiation energy and sample temperature on
the performance of grain boundaries as helium sinks in ultrafine grained and nanocrystalline …

Grain size threshold for enhanced irradiation resistance in nanocrystalline and ultrafine tungsten

O El-Atwani, JA Hinks, G Greaves… - Materials Research …, 2017 - Taylor & Francis
Nanocrystalline metals are considered highly radiation-resistant materials due to their large
grain boundary areas. Here, the existence of a grain size threshold for enhanced irradiation …

Unprecedented irradiation resistance of nanocrystalline tungsten with equiaxed nanocrystalline grains to dislocation loop accumulation

O El-Atwani, E Esquivel, E Aydogan, E Martinez… - Acta Materialia, 2019 - Elsevier
Nanocrystalline metals are often postulated as irradiation tolerant materials due to higher
grain boundary densities. The efficiency of these materials in mitigating irradiation damage …

Ultrafine tungsten as a plasma-facing component in fusion devices: effect of high flux, high fluence low energy helium irradiation

O El-Atwani, S Gonderman, M Efe… - Nuclear …, 2014 - iopscience.iop.org
This work discusses the response of ultrafine-grained tungsten materials to high-flux, high-
fluence, low energy pure He irradiation. Ultrafine-grained tungsten samples were exposed …

Grain boundary softening from stress assisted helium cavity coalescence in ultrafine-grained tungsten

WS Cunningham, Y Zhang, SL Thomas, O El-Atwani… - Acta Materialia, 2023 - Elsevier
The formation of helium cavities in coarse-grained materials produces hardening
proportional to the number density and size of the cavities and due to the interaction of …

Revealing the synergistic effects of sequential and simultaneous dual beam irradiations in tungsten via in-situ TEM

O El-Atwani, WS Cunningham, JR Trelewicz… - Journal of Nuclear …, 2020 - Elsevier
Elucidating the synergistic effects of different energetic beams on the radiation response of
nuclear materials is critical for develo** an improved methodology for their evaluation …