Results 1 to 10 of about 32,260 (174)
Two-dimensional vacancy platelets as precursors for basal dislocation loops in hexagonal zirconium [PDF]
Nature Communications, 2020 Zirconium alloys are widely used in the nuclear industry, but long-time irradiation leads to shape changes and irradiation growth that relate to basal dislocation loops in zirconium. Here the authors discern nanoscale triangle-shaped vacancy platelets in
Si-Mian Liu +2 more
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Compact A15 Frank-Kasper nano-phases at the origin of dislocation loops in face-centred cubic metals [PDF]
Nature Communications, 2023 It is generally considered that the elementary building blocks of defects in face-centred cubic (fcc) metals, e.g., interstitial dumbbells, coalesce directly into ever larger 2D dislocation loops, implying a continuous coarsening process. Here, we reveal
Alexandra M. Goryaeva +8 more
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Impact of interstitial impurities on the trapping of dislocation loops in tungsten [PDF]
Scientific Reports, 2021 Ab initio simulations are employed to assess the interaction of typical interstitial impurities with self-interstitial atoms, dislocation loops and edge dislocation lines in tungsten.
Alexander Bakaev +4 more
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Shockwave generates < 100 > dislocation loops in bcc iron [PDF]
Nature Communications, 2018 Irradiating iron introduces defects such as interstitial dislocation loops, whose exact formation mechanism remains unclear. Here, the authors use large scale molecular dynamics simulations to reveal a punch out mechanism that can directly create ...
Qing Peng +7 more
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Mechanisms for <100> interstitial dislocation loops to diffuse in BCC iron [PDF]
Nature Communications, 2021 The mobility of dislocation loops in materials is of key importance to understanding their deformation behavior. Here the authors using self-adaptive accelerated molecular dynamics show self-diffusion of interstitial loops in body-centered cubic (BCC ...
N. Gao +4 more
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In-situ observation of the initiation of plasticity by nucleation of prismatic dislocation loops [PDF]
Nature Communications, 2020 Prismatic dislocation loops (PDLs) form during the elastic-to-plastic transition of a dislocation-free volume under nanoindentation. Here the authors observe the initial plasticity and burst-like emission of PDLs in Au nanowires by in-situ transmission ...
Subin Lee +8 more
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Effects of precipitates and dislocation loops on the yield stress of irradiated iron [PDF]
Scientific Reports, 2018 Plastic deformation of crystalline materials is governed by the features of stress-driven motion of dislocations. In the case of irradiated steels subject to applied stresses, small dislocation loops as well as precipitates are known to interfere with ...
Arttu Lehtinen +4 more
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Ion Irradiation Defects and Hardening in FeCrAl Alloy
Metals, 2022 The self-ion irradiation experiments of FeCrAl and Y−FeCrAl alloys are carried out at 330 °C to 1–10 displacements per atom (dpa). The formation of dislocation loops in these alloys is investigated by transmission electron microscopy (TEM) and nano ...
Fang Li +8 more
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Nuclear Materials and Energy, 2023 Vanadium(V)-based alloys have received extensive attention as promising first-wall and blanket candidates for fusion reactors. In the present study, molecular dynamics (MD) simulations have been performed to study the displacement cascades in V bulk with
Rongyang Qiu +7 more
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LACBED characterization of dislocation loops [PDF]
Philosophical Magazine, 2006 The characterization of the amplitude and sign of the Burgers vector of perfect or partial dislocations from large-angle convergent-beam electron diffraction (LACBED) patterns is now a routine technique following the original idea proposed by Cherns and Preston [Proceedings of ICEM-11, Kyoto, Japan, pp. 721–722 (1986)].
Morniroli, Jean-Paul +3 more
openaire +2 more sources