Effects of transition metal carbide dispersoids on helium bubble formation in dispersion-strengthened tungsten [PDF]
Scientific Reports, 2023 The formation of helium bubbles and subsequent property degradation poses a significant challenge to tungsten as a plasma-facing material in future long-pulse plasma-burning fusion reactors.
Ashrakat Saefan +7 more
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Anomalous shape effect of nanosized helium bubble on the elastic field in irradiated tungsten [PDF]
Scientific Reports, 2021 Bubble pressure and elastic response in helium-irradiated tungsten are systematically investigated in this study. An anomalous shape effect is found that the radial normal stress and mean stress distributions around a nanosized void or bubble are far ...
Xinlong Huang +2 more
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Engineering self-organising helium bubble lattices in tungsten [PDF]
Scientific Reports, 2017 The self-organisation of void and gas bubbles in solids into superlattices is an intriguing nanoscale phenomenon. Despite the discovery of these lattices 45 years ago, the atomistics behind the ordering mechanisms responsible for the formation of these ...
R. W. Harrison +3 more
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Theoretical Model of Helium Bubble Growth and Density in Plasma-Facing Metals. [PDF]
Sci Rep, 2020 We present a theoretically-motivated model of helium bubble density as a function of volume for high-pressure helium bubbles in plasma-facing tungsten. The model is a good match to the empirical correlation we published previously [Hammond et al., Acta ...
Hammond KD, Maroudas D, Wirth BD.
europepmc +2 more sources
In-Situ Helium Implantation and TEM Investigation of Radiation Tolerance to Helium Bubble Damage in Equiaxed Nanocrystalline Tungsten and Ultrafine Tungsten-TiC Alloy. [PDF]
Materials (Basel), 2020 The use of ultrafine and nanocrystalline materials is a proposed pathway to mitigate irradiation damage in nuclear fusion components. Here, we examine the radiation tolerance of helium bubble formation in 85 nm (average grain size) nanocrystalline ...
El Atwani O +6 more
europepmc +2 more sources
The Shock-Induced Deformation and Spallation Failure of Bicrystal Copper with a Nanoscale Helium Bubble via Molecular Dynamics Simulations [PDF]
Nanomaterials, 2023 Both the nanoscale helium (He) bubble and grain boundaries (GBs) play important roles in the dynamic mechanical behavior of irradiated nanocrystalline materials.
Qi Zhu, Jianli Shao, Pei Wang
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Swelling and Helium Bubble Morphology in a Cryogenically Treated FeCrNi Alloy with Martensitic Transformation and Reversion after Helium Implantation. [PDF]
Materials (Basel), 2019 A cryo-quenched 70 wt % Fe-15 wt% Cr-15 wt% Ni single-crystal alloy with fcc (face centered cubic), bcc (body centered cubic), and hcp (hexagonal close packed) phases was implanted with 200 keV He+ ions up to 2 × 1017 ions·cm−2 at 773 K.
Zhang F +5 more
europepmc +2 more sources
Resistance to Helium Bubble Formation in Amorphous SiOC/Crystalline Fe Nanocomposite. [PDF]
Materials (Basel), 2018 The management of radiation defects and insoluble He atoms represent key challenges for structural materials in existing fission reactors and advanced reactor systems.
Su Q +4 more
europepmc +2 more sources
Materials Research Letters, 2018 This work, with an emphasis on helium irradiation rates appropriate for fusion-plasma conditions, advances the understanding of helium evolution at grain boundaries in W, an important consideration in the understanding of W as a plasma-facing component ...
X.-Y. Liu +3 more
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Comparative study on radiation resistance of WTaCrV high-entropy alloy and tungsten in helium-containing conditions [PDF]
Scientific ReportsW and W-based high-entropy alloys are promising candidates for plasma-facing materials in fusion reactors. While irradiation studies on W have revealed a tendency for helium (He) bubble formation and radiation-induced defects, investigations of WTaCrV ...
Amin Esfandiarpour +3 more
doaj +2 more sources