Journal ArticleDOI
The influence of high grain boundary density on helium retention in tungsten
G. Valles,César González,Ignacio Martin-Bragado,R. Iglesias,José Manuel Perlado,Antonio Rivera +5 more
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In this paper, the influence of a high grain boundary density on the amount, size and distribution of defects produced by pulsed helium (625 keV) irradiation in tungsten has been studied.About:
This article is published in Journal of Nuclear Materials.The article was published on 2015-02-01. It has received 41 citations till now. The article focuses on the topics: Tungsten & Grain boundary.read more
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Recent advances in modeling and simulation of the exposure and response of tungsten to fusion energy conditions
Jaime Marian,Charlotte Becquart,Christophe Domain,Sergei L. Dudarev,Mark R. Gilbert,Richard J. Kurtz,Daniel R. Mason,Kai Nordlund,A. E. Sand,Lance Lewis Snead,Tomoaki Suzudo,Brian D. Wirth +11 more
TL;DR: A review of recent efforts in computational modeling of W both as a plasmafacing material exposed to He deposition as well as a bulk material subjected to fast neutron irradiation is provided in this article.
Journal ArticleDOI
A comparative study on the in situ helium irradiation behavior of tungsten: Coarse grain vs. nanocrystalline grain
Zhe Chen,Zhe Chen,Liang-Liang Niu,Liang-Liang Niu,Zhanlei Wang,Lifeng Tian,Laszlo J. Kecskes,Kaigui Zhu,Qiuming Wei +8 more
TL;DR: In this article, the effects of grain boundaries on the degradation mechanism of nanostructured materials, fabricated by high pressure torsion (HPT-W), were evaluated in situ in a helium ion microscopy.
Journal ArticleDOI
Recent progresses on designing and manufacturing of bulk refractory alloys with high performances based on controlling interfaces
TL;DR: In this article, the authors reviewed the recent progress of simulations and experiments on interface design strategies that achieve high performance refractory alloys such as tungsten and molybdenum based alloys with high strength, thermal/electrical conductivity, low coefficient of thermal expansion and excellent creep resistances.
Journal ArticleDOI
Influence of grain boundaries on the radiation-induced defects and hydrogen in nanostructured and coarse-grained tungsten
G. Valles,M. Panizo-Laiz,César González,Ignacio Martin-Bragado,Raquel González-Arrabal,N. Gordillo,R. Iglesias,C.L. Guerrero,José Manuel Perlado,Antonio Rivera +9 more
TL;DR: In this paper, the influence of grain boundaries (GBs) on the radiation-induced defect evolution and on H retention at 300 K, both experimentally and by computer simulations, was studied.
References
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Journal ArticleDOI
An object Kinetic Monte Carlo Simulation of the dynamics of helium and point defects in tungsten
TL;DR: In this article, an object Kinetic Monte Carlo technique parameterized on ab initio calculations was used to model He desorption in W. The evolution of the number of defects in the KMC simulation was found to be in good agreement with the resistivity changes observed during an He implantation in a thin wire of tungsten.
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Molecular dynamics simulations of helium cluster formation in tungsten
TL;DR: In this paper, a simulation of helium implantation into single-crystalline tungsten at 0 and 300 K has been performed using non-damaging ion energies of 50, 100 and 200 eV.
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Dislocation loops and bubbles in oxide dispersion strengthened ferritic steel after helium implantation under stress
TL;DR: In this paper, the oxide dispersion strengthened (ODS) ferritic steel PM2000 was homogeneously implanted with α-particles under uniaxial tensile stresses ranging from 20 to 250 MPa, causing irradiation creep.
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MMonCa: An Object Kinetic Monte Carlo simulator for damage irradiation evolution and defect diffusion
TL;DR: The comparisons validate MMonCa showing that it is powerful and flexible enough to be customized and used to study the damage evolution of defects in a wide range of solid materials.
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Retention and surface blistering of helium irradiated tungsten as a first wall material
S. Gilliam,S.M. Gidcumb,Nalin R. Parikh,D.G. Forsythe,B.K. Patnaik,John D. Hunn,Lance Lewis Snead,G.P. Lamaze +7 more
TL;DR: In this article, a study of helium retention and surface blistering with regard to helium dose, temperature, pulsed implantation, and tungsten microstructure was conducted to better understand what may occur at the first wall of an inertial fusion energy reactor.