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Title: Evidence of a temperature transition for denuded zone formation in nanocrystalline Fe under He irradiation

Abstract

Nanocrystalline materials are radiation-tolerant materials’ candidates due to their high defect sink density. Here, nanocrystalline iron films were irradiated with 10 keV helium ions in situ in a transmission electron microscope at elevated temperatures. Grain-size-dependent bubble density changes and denuded zone occurrence were observed at 700 K, but not at 573 K. This transition, attributed to increased helium–vacancy migration at elevated temperatures, suggests that nanocrystalline microstructures are more resistant to swelling at 700 K due to decreased bubble density. Finally, denuded zone formation had no correlation with grain size and misorientation angle under the conditions studied.

Authors:
 [1];  [1];  [1];  [2];  [3];  [1]
  1. Department of Materials Science & Engineering, Drexel University, Philadelphia, PA USA
  2. Center for Integrated Nanotechnologies, Los Alamos National Laboratory, Los Alamos, NM, USA
  3. Department of Radiation Solid Interactions, Sandia National Laboratories, Albuquerque, NM, USA
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC), Basic Energy Sciences (BES); Laboratory Directed Research and Development (LDRD
OSTI Identifier:
1510150
Alternate Identifier(s):
OSTI ID: 1422929
Report Number(s):
LA-UR-17-31234
Journal ID: ISSN 2166-3831; 7
Grant/Contract Number:  
AC04-94AL85000; AC52-06NA25396; SC0008274
Resource Type:
Published Article
Journal Name:
Materials Research Letters
Additional Journal Information:
Journal Name: Materials Research Letters Journal Volume: 5 Journal Issue: 3; Journal ID: ISSN 2166-3831
Publisher:
Informa UK Limited
Country of Publication:
United Kingdom
Language:
English
Subject:
36 MATERIALS SCIENCE; 77 NANOSCIENCE AND NANOTECHNOLOGY; He implantation; TEM; bubbles; denuded zones; grain boundary

Citation Formats

El-Atwani, O., Nathaniel, II, J. E., Leff, A. C., Baldwin, J. K., Hattar, K., and Taheri, M. L. Evidence of a temperature transition for denuded zone formation in nanocrystalline Fe under He irradiation. United Kingdom: N. p., 2016. Web. doi:10.1080/21663831.2016.1243591.
El-Atwani, O., Nathaniel, II, J. E., Leff, A. C., Baldwin, J. K., Hattar, K., & Taheri, M. L. Evidence of a temperature transition for denuded zone formation in nanocrystalline Fe under He irradiation. United Kingdom. doi:10.1080/21663831.2016.1243591.
El-Atwani, O., Nathaniel, II, J. E., Leff, A. C., Baldwin, J. K., Hattar, K., and Taheri, M. L. Tue . "Evidence of a temperature transition for denuded zone formation in nanocrystalline Fe under He irradiation". United Kingdom. doi:10.1080/21663831.2016.1243591.
@article{osti_1510150,
title = {Evidence of a temperature transition for denuded zone formation in nanocrystalline Fe under He irradiation},
author = {El-Atwani, O. and Nathaniel, II, J. E. and Leff, A. C. and Baldwin, J. K. and Hattar, K. and Taheri, M. L.},
abstractNote = {Nanocrystalline materials are radiation-tolerant materials’ candidates due to their high defect sink density. Here, nanocrystalline iron films were irradiated with 10 keV helium ions in situ in a transmission electron microscope at elevated temperatures. Grain-size-dependent bubble density changes and denuded zone occurrence were observed at 700 K, but not at 573 K. This transition, attributed to increased helium–vacancy migration at elevated temperatures, suggests that nanocrystalline microstructures are more resistant to swelling at 700 K due to decreased bubble density. Finally, denuded zone formation had no correlation with grain size and misorientation angle under the conditions studied.},
doi = {10.1080/21663831.2016.1243591},
journal = {Materials Research Letters},
number = 3,
volume = 5,
place = {United Kingdom},
year = {2016},
month = {10}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
DOI: 10.1080/21663831.2016.1243591

Citation Metrics:
Cited by: 5 works
Citation information provided by
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    Works referencing / citing this record:

    Direct Observation of Sink-Dependent Defect Evolution in Nanocrystalline Iron under Irradiation
    journal, May 2017


    Radiation-Induced Helium Bubbles in Metals
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    • Li, Shi-Hao; Li, Jing-Ting; Han, Wei-Zhong
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