Observatorio de I+D+i UPM

Memorias de investigación
Research Publications in journals:
The influence of high grain boundary density on helium retention in tungsten
Year:2015
Research Areas
  • Engineering
Information
Abstract
In order to study 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, we have carried out Object Kinetic Monte Carlo (OKMC) simulations in both monocrystalline and nanocrystalline tungsten. The parameterization of the OKMC code (MMonCa) includes binding energies obtained with our in-house Density Functional Theory (DFT) calculations. In the interior of a grain in nanocrystalline tungsten the mixed HenVm clusters are larger and have a lower He/V ratio. Thus, they are less pressurized clusters. The total elastic strain energy remains almost constant with the increasing number of pulses, contrary to its increase in monocrystalline tungsten. A better response to helium irradiation is therefore expected in nanocrystalline tungsten, opening a new path to investigate these nanostructured materials for fusion purposes
International
Si
JCR
Si
Title
JOURNAL OF NUCLEAR MATERIALS
ISBN
0022-3115
Impact factor JCR
2,016
Impact info
Volume
457
Journal number
From page
80
To page
87
Month
SIN MES
Ranking
Participants
  • Autor: Gonzalo Valles Alberdi (UPM)
  • Autor: C. González (Departamento de Física, Universidad de Oviedo)
  • Autor: I. Martín-Bragado (IMDEA Materials)
  • Autor: R. Iglesias (Departamento de Física, Universidad de Oviedo)
  • Autor: Jose Manuel Perlado Martin (UPM)
  • Autor: Antonio Juan Rivera de Mena (UPM)
Research Group, Departaments and Institutes related
  • Creador: Grupo de Investigación: Fusión Nuclear Inercial y Tecnología de fusión
S2i 2021 Observatorio de investigación @ UPM con la colaboración del Consejo Social UPM
Cofinanciación del MINECO en el marco del Programa INNCIDE 2011 (OTR-2011-0236)
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