European materials development: Results and perspective

Pintsuk, G.; Diegele, E.; Dudarev, S. L.; Gorley, Michael; Henry, J.; Reiser, J.; Rieth, M.

doi:10.1016/j.fusengdes.2019.02.063

Cited by 61 publications

(23 citation statements)

References 50 publications

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“…Effects such as hardening or loss of plasticity are common in metals exposed to irradiation [1,2]. The development of radiation resistant materials for fusion applications can benefit from a fundamental understanding of dislocation-defect interactions [3].…”

Section: Introductionmentioning

confidence: 99%

Collision cascade effects near an edge dislocation dipole in alpha-Fe: Induced dislocation mobility and enhanced defect clustering

Heredia-Ávalos

Denton

Moreno-Marı́n

et al. 2021

Journal of Nuclear Materials

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Collision cascades near a 1/2 111 {110} edge dipole in alpha-iron have been studied using molecular dynamics simulations for a recoil energy of 20 keV and two temperatures, 20 K and 300 K. These simulations show that the collision cascade induces the migration of the dislocations through glide along its slip plane. The motion of the dislocations starts at the peak of the collision cascade and expands a time scale much longer than the cascade duration, until restoring the equilibrium distance of the dipole, regardless of the damage produced by the cascade. At the initial stages, kinks are formed at the dislocation that enhance glide. When defects reach the dislocations, jogs are produced. We show that the initial dislocation motion is triggered by the shock wave of the collision cascade. The cascade morphology is also strongly influenced by the presence of the dislocations, having an elongated form at the peak of the displacement, which demonstrates the strong interaction of the dislocations with the cascade even at the early stages. Finally, we show that larger vacancy clusters are formed in the presence of dislocations compared to isolated cascades and that these clusters are larger for 300 K compared to 20 K.

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Section: Introductionmentioning

confidence: 99%

Collision cascade effects near an edge dislocation dipole in alpha-Fe: Induced dislocation mobility and enhanced defect clustering

Heredia-Ávalos

Denton

Moreno-Marı́n

et al. 2021

Journal of Nuclear Materials

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“…Embrittlement is a phenomenon in which a material can no longer deform plastically before ultimate failure, and suddenly fails as soon as a defect is initiated. Naturally, such a behaviour cannot be tolerated in a structural component, whose failure would potential candidates [8]. Unfortunately, one still lacks the experimental validation of such novel materials since no present neutron source shares both the same energy spectrum and fluence expected in DEMO.…”

Section: Neutron Irradiation Of the Materialsmentioning

confidence: 99%

The lifetime of components in a fusion reactor

Dose

2021

Europhysics News

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“…There is an ongoing, persistent quest to find the most suitable fusion materials and novel solutions employing W, such as W-fiber components, W laminates or "smart" W alloys [25][26][27] or to join such materials in components [28]. The goal is to remove the heat as efficiently as possible from the surface exposed to the heat load of the plasma.…”

Section: Introductionmentioning

confidence: 99%

Irradiation of W and K-Doped W Laminates without or with Cu, V, Ti Interlayers under a Pulsed 6 MeV Electron Beam

et al. 2022

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Small multilayered laminated samples consisting of stacks of W (or K-doped W) foils without an interlayer or with interlayers from Cu, V, and Ti were exposed to a pulsed electron beam with an energy of 6 MeV in several irradiation sessions. All samples maintained their macroscopic integrity, suggesting that the W-metal laminate concept is compatible with high heat flux applications. The surface of the samples was analyzed using a scanning electron microscope (SEM) before and after each irradiation session. The experimental results indicate that electron beam irradiation induces obvious modifications on the surface of the samples. Morphological changes such as the appearance of nanodroplets, nanostructures, and melting and cracking, depending on the sample type and the electron beam fluence, are observed. The irradiation is carried out in a vacuum at a pressure of 2 to 4 × 10−2 torr, without active cooling for the samples. The structures observed on the surface of the samples are likely due to electron beam heating and vaporization followed by vapor condensation in the volume adjacent to the surface.

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European materials development: Results and perspective

Cited by 61 publications

References 50 publications

Collision cascade effects near an edge dislocation dipole in alpha-Fe: Induced dislocation mobility and enhanced defect clustering

Collision cascade effects near an edge dislocation dipole in alpha-Fe: Induced dislocation mobility and enhanced defect clustering

The lifetime of components in a fusion reactor

Irradiation of W and K-Doped W Laminates without or with Cu, V, Ti Interlayers under a Pulsed 6 MeV Electron Beam

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