Synergy of plastic deformation and gas retention in tungsten

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Abstract

Taking the example of tungsten, we demonstrate that high-flux plasma exposure of recrystallized and plastically deformed samples leads to principal differences in the gas trapping and associated surface modification. Surface of the exposed predeformed samples exhibits ruptured μm-sized blisters, a signature of bubbles nucleated close to the surface on the plastically induced dislocation network. Contrary to the recrystallized samples, no stage attributable to gas bubbles appeared in the desorption spectrum of the deformed samples demonstrating the strong impact of dislocations on hydrogen retention.

Details

Original languageEnglish
Article number013007
Pages (from-to)1-5
JournalNuclear Fusion
Volume55
DOIs
Publication statusPublished - 2015

Keywords

  • Dislocation, Retention, Hydrogen

ID: 782717