Revealing the synergistic effects of sequential and simultaneous dual beam irradiations in tungsten via in-situ TEM

El Atwani, Osman; Cunningham, W. Streit; Trelewicz, Jason R.; Li, Meimei; Wirth, Brian David; Maloy, Stuart Andrew

doi:10.1016/j.jnucmat.2020.152150

Revealing the synergistic effects of sequential and simultaneous dual beam irradiations in tungsten via in-situ TEM

Journal Article · Fri Apr 10 00:00:00 EDT 2020 · Journal of Nuclear Materials

DOI:https://doi.org/10.1016/j.jnucmat.2020.152150· OSTI ID:1616424

^[1]; Cunningham, W. Streit ^[2]; Trelewicz, Jason R. ^[2]; Li, Meimei ^[3]; Wirth, Brian David ^[4]; ^[1]

Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Stony Brook Univ., NY (United States)
Argonne National Lab. (ANL), Argonne, IL (United States)
Univ. of Tennessee, Knoxville, TN (United States)

Elucidating the synergistic effects of different energetic beams on the radiation response of nuclear materials is critical for developing an improved methodology for their evaluation when exposed to extreme environments. This article describes in-situ sequential (He implantation followed by Kr irradiation and vice-versa) and simultaneous (heavy ion Kr irradiation and He implantation) dual beam irradiations performed on tungsten at 1223 K. Dislocation loop density, average area, and total loop damage as a function of irradiation history and dose/fluence are quantified. The loop Burgers vectors and cavity damage (cavity density, size and total change in volume) are also determined at the final maximum dose for each condition. The loop damage evolution was different in all cases, with the smallest loop damage observed in the simultaneous experiment. Annihilation of Kr generated dislocation loops during He implantation in the Kr + He experiment was an unanticipated observation that may be explained by the dynamic evolution of dislocation loop sink strengths and time-dependent defect fluxes. Dislocation loop raft formation, denuded zones near extended defects, and cavity damage are compared across the different conditions. The phenomena observed and discussed in this work will stimulate further experimental and computational modeling activities leading to improved fundamental understanding of the irradiation response of nuclear materials under reactor-similar environments.

View Accepted Manuscript (DOE)

Research Organization:: Argonne National Laboratory (ANL), Argonne, IL (United States); Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)

Sponsoring Organization:: USDOE Office of Nuclear Energy (NE); USDOE Office of Science (SC), Advanced Scientific Computing Research (ASCR); USDOE Office of Science (SC), Advanced Scientific Computing Research (ASCR) (SC-21); USDOE Office of Science (SC), Fusion Energy Sciences (FES); USDOE Office of Science (SC), Fusion Energy Sciences (FES) (SC-24)

Grant/Contract Number:: 89233218CNA000001; AC02-06CH11357; SC0006661; SC0008875; SC0017899

OSTI ID:: 1616424

Alternate ID(s):: OSTI ID: 1632908
OSTI ID: 1774633

Report Number(s):: LA-UR--19-30538

Journal Information:: Journal of Nuclear Materials, Journal Name: Journal of Nuclear Materials Journal Issue: C Vol. 538; ISSN 0022-3115

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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Revealing the synergistic effects of sequential and simultaneous dual beam irradiations in tungsten via in-situ TEM

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References (54)

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