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

Abstract

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 understandingmore » of the irradiation response of nuclear materials under reactor-similar environments.« less

Authors:
ORCiD logo [1];  [2];  [2];  [3];  [4]; ORCiD logo [1]
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  2. Stony Brook Univ., NY (United States)
  3. Argonne National Lab. (ANL), Argonne, IL (United States)
  4. Univ. of Tennessee, Knoxville, TN (United States)
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE Office of Nuclear Energy (NE); USDOE Office of Science (SC), Fusion Energy Sciences (FES); USDOE Office of Science (SC), Advanced Scientific Computing Research (ASCR)
OSTI Identifier:
1616424
Alternate Identifier(s):
OSTI ID: 1632908
Report Number(s):
LA-UR-19-30538
Journal ID: ISSN 0022-3115
Grant/Contract Number:  
89233218CNA000001; AC07- 051D14517; 20160674PRD3; SC0017899; SC0008875; SC-0006661
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Journal of Nuclear Materials
Additional Journal Information:
Journal Volume: 538; Journal Issue: C; Journal ID: ISSN 0022-3115
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; Dual beam; in-situ; Dislocation loops; Irradiation damage; Fusion

Citation Formats

El Atwani, Osman, Cunningham, W. Streit, Trelewicz, Jason R., Li, Meimei, Wirth, Brian David, and Maloy, Stuart Andrew. Revealing the synergistic effects of sequential and simultaneous dual beam irradiations in tungsten via in-situ TEM. United States: N. p., 2020. Web. doi:10.1016/j.jnucmat.2020.152150.
El Atwani, Osman, Cunningham, W. Streit, Trelewicz, Jason R., Li, Meimei, Wirth, Brian David, & Maloy, Stuart Andrew. Revealing the synergistic effects of sequential and simultaneous dual beam irradiations in tungsten via in-situ TEM. United States. doi:10.1016/j.jnucmat.2020.152150.
El Atwani, Osman, Cunningham, W. Streit, Trelewicz, Jason R., Li, Meimei, Wirth, Brian David, and Maloy, Stuart Andrew. Fri . "Revealing the synergistic effects of sequential and simultaneous dual beam irradiations in tungsten via in-situ TEM". United States. doi:10.1016/j.jnucmat.2020.152150.
@article{osti_1616424,
title = {Revealing the synergistic effects of sequential and simultaneous dual beam irradiations in tungsten via in-situ TEM},
author = {El Atwani, Osman and Cunningham, W. Streit and Trelewicz, Jason R. and Li, Meimei and Wirth, Brian David and Maloy, Stuart Andrew},
abstractNote = {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.},
doi = {10.1016/j.jnucmat.2020.152150},
journal = {Journal of Nuclear Materials},
issn = {0022-3115},
number = C,
volume = 538,
place = {United States},
year = {2020},
month = {4}
}

Journal Article:
Free Publicly Available Full Text
This content will become publicly available on April 10, 2021
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