Grain boundary motion assisted via radiation cascades in bcc Fe
- CANMET-Materials Technology Laboratory, Natural Resources Canada, Ottawa, Ontario, K1A 0G1 (Canada)
Molecular-dynamic simulations were performed to study the influence of displacement cascades on grain boundary (GB) structure and stability in bcc Fe. A {sigma}=5, (310)[001] symmetric tilt boundary with a tilt angle of {theta}=36.9 deg. was used for the simulations. We find that GB motion, either sliding or migration, is activated under the influence of displacement cascades at lower internal stresses as compared to the unirradiated GBs. We postulate that radiation-induced GB damage aids the nucleation mechanisms that trigger GB motion. Furthermore, radiation-induced GB sliding significantly relaxes internal stress and may provide a viable mechanism for promoting irradiation creep via GB accommodation processes.
- OSTI ID:
- 21192453
- Journal Information:
- Physical Review. B, Condensed Matter and Materials Physics, Vol. 78, Issue 13; Other Information: DOI: 10.1103/PhysRevB.78.134114; (c) 2008 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1098-0121
- Country of Publication:
- United States
- Language:
- English
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