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Title: The role of grain size in He bubble formation: Implications for swelling resistance

Abstract

Here, nanocrystalline metals are postulated as radiation resistant materials due to their high defect and particle (e.g. Helium) sink density. Here, the performance of nanocrystalline iron films is investigated in-situ in a transmission electron microscope (TEM) using He irradiation at 700 K. Automated crystal orientation mapping is used in concert with in-situ TEM to explore the role of grain orientation and grain boundary character on bubble density trends. Bubble density as a function of three key grain size regimes is demonstrated. While the overall trend revealed an increase in bubble density up to a saturation value, grains with areas ranging from 3000 to 7500 nm2 show a scattered distribution. An extrapolated swelling resistance based on bubble size and areal density indicated that grains with sizes less than 2000 nm2 possess the greatest apparent resistance. Moreover, denuded zones are found to be independent of grain size, grain orientation, and grain boundary misorientation angle.

Authors:
ORCiD logo [1];  [1];  [1];  [2]; ORCiD logo [3];  [3];  [1]
  1. Drexel Univ., Philadelphia, PA (United States)
  2. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Sandia National Lab. (SNL-CA), Livermore, CA (United States)
  3. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Publication Date:
Research Org.:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE Laboratory Directed Research and Development (LDRD) Program; USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1440488
Alternate Identifier(s):
OSTI ID: 1460124
Report Number(s):
LA-UR-17-31194
Journal ID: ISSN 0022-3115; TRN: US1900750
Grant/Contract Number:  
AC52-06NA25396; SC0008274; AC04-94AL85000
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Nuclear Materials
Additional Journal Information:
Journal Volume: 484; Journal Issue: C; Journal ID: ISSN 0022-3115
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; Bubble formation; Nanocrystalline; Denuded zone; Swelling

Citation Formats

El-Atwani, Osman, Nathaniel, II, James E., Leff, Asher C., Muntifering, Brittany R., Baldwin, Jon Kevin Scott, Hattar, Khalid, and Taheri, Mitra L. The role of grain size in He bubble formation: Implications for swelling resistance. United States: N. p., 2016. Web. doi:10.1016/j.jnucmat.2016.12.003.
El-Atwani, Osman, Nathaniel, II, James E., Leff, Asher C., Muntifering, Brittany R., Baldwin, Jon Kevin Scott, Hattar, Khalid, & Taheri, Mitra L. The role of grain size in He bubble formation: Implications for swelling resistance. United States. https://doi.org/10.1016/j.jnucmat.2016.12.003
El-Atwani, Osman, Nathaniel, II, James E., Leff, Asher C., Muntifering, Brittany R., Baldwin, Jon Kevin Scott, Hattar, Khalid, and Taheri, Mitra L. Wed . "The role of grain size in He bubble formation: Implications for swelling resistance". United States. https://doi.org/10.1016/j.jnucmat.2016.12.003. https://www.osti.gov/servlets/purl/1440488.
@article{osti_1440488,
title = {The role of grain size in He bubble formation: Implications for swelling resistance},
author = {El-Atwani, Osman and Nathaniel, II, James E. and Leff, Asher C. and Muntifering, Brittany R. and Baldwin, Jon Kevin Scott and Hattar, Khalid and Taheri, Mitra L.},
abstractNote = {Here, nanocrystalline metals are postulated as radiation resistant materials due to their high defect and particle (e.g. Helium) sink density. Here, the performance of nanocrystalline iron films is investigated in-situ in a transmission electron microscope (TEM) using He irradiation at 700 K. Automated crystal orientation mapping is used in concert with in-situ TEM to explore the role of grain orientation and grain boundary character on bubble density trends. Bubble density as a function of three key grain size regimes is demonstrated. While the overall trend revealed an increase in bubble density up to a saturation value, grains with areas ranging from 3000 to 7500 nm2 show a scattered distribution. An extrapolated swelling resistance based on bubble size and areal density indicated that grains with sizes less than 2000 nm2 possess the greatest apparent resistance. Moreover, denuded zones are found to be independent of grain size, grain orientation, and grain boundary misorientation angle.},
doi = {10.1016/j.jnucmat.2016.12.003},
journal = {Journal of Nuclear Materials},
number = C,
volume = 484,
place = {United States},
year = {Wed Dec 07 00:00:00 EST 2016},
month = {Wed Dec 07 00:00:00 EST 2016}
}

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Cited by: 69 works
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