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Evidence of a temperature transition for denuded zone formation in nanocrystalline Fe under He irradiation
Journal article   Open access

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

O. El-Atwani, J. E. Nathaniel, A. C. Leff, J. K. Baldwin, K. Hattar, M. L. Taheri and Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Materials research letters, v 5(3)
01 Jan 2017
DOI: https://doi.org/10.1080/21663831.2016.1243591
url
https://www.tandfonline.com/doi/pdf/10.1080/21663831.2016.1243591?needAccess=trueView
Published, Version of Record (VoR) Open
url
https://doi.org/10.1080/21663831.2016.1243591View
Published, Version of Record (VoR) Open

Abstract

Materials Science Materials Science, Multidisciplinary Science & Technology Technology
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.

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28 citations in Web of Science
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Collaboration types
Domestic collaboration
Web of Science research areas
Materials Science, Multidisciplinary
Metallurgy & Metallurgical Engineering
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