Actions for Dislocation Interactions with Voids and Helium Bubbles in FCC Metals [electronic resource].

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Dislocation Interactions with Voids and Helium Bubbles in FCC Metals [electronic resource].

Published
Washington, D.C. : United States. Dept. of Energy, 2003.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description
PDF-file: 8 pages; size: 0.3 Mbytes
Additional Creators
Lawrence Berkeley National Laboratory, United States. Department of Energy, and United States. Department of Energy. Office of Scientific and Technical Information
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Summary
The formation of a high number density of helium bubbles in FCC metals irradiated within the fusion energy environment is well established. Yet, the role of helium bubbles in radiation hardening and mechanical property degradation of these steels remains an outstanding issue. In this paper, we present the results of a combined molecular dynamics simulation and in-situ straining transmission electron microscopy study, which investigates the interaction mechanisms between glissile dislocations and nanometer-sized helium bubbles. The molecular dynamics simulations, which directly account for dislocation core effects through semi-empirical interatomic potentials, provide fundamental insight into the effect of helium bubble size and internal gas pressure on the dislocation/bubble interaction and bypass mechanisms. The combination of simulation and in-situ straining experiments provides a powerful approach to determine the atomic to microscopic mechanisms of dislocation-helium bubble interactions, which govern the mechanical response of metals irradiated within the fusion environment.
Report Numbers
E 1.99:ucrl-conf-201086
ucrl-conf-201086
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Note
Published through SciTech Connect.
11/18/2003.
"ucrl-conf-201086"
Presented at: 11th International Conference on Fusion Reactor Materials, Kyoto, Japan, Dec 07 - Dec 12, 2003.
Young, J; Robertson, I; Wirth, B; Robach, J.
Funding Information
W-7405-ENG-48
View MARC record | catkey: 14448176