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

El-Atwani, O.; Nathaniel, II, J. E.; Leff, A. C.; Baldwin, J. K.; Hattar, K.; Taheri, M. L.

doi:10.1080/21663831.2016.1243591

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

Journal Article · Tue Oct 18 00:00:00 EDT 2016 · Materials Research Letters

DOI:https://doi.org/10.1080/21663831.2016.1243591· OSTI ID:1510150

El-Atwani, O. ^[1]; Nathaniel, II, J. E. ^[1]; Leff, A. C. ^[1]; Baldwin, J. K. ^[2]; Hattar, K. ^[3]; Taheri, M. L. ^[1]

Department of Materials Science & Engineering, Drexel University, Philadelphia, PA USA
Center for Integrated Nanotechnologies, Los Alamos National Laboratory, Los Alamos, NM, USA
Department of Radiation Solid Interactions, Sandia National Laboratories, Albuquerque, NM, USA

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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Research Organization:: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC), Basic Energy Sciences (BES); Laboratory Directed Research and Development (LDRD

Grant/Contract Number:: AC04-94AL85000; AC52-06NA25396; SC0008274

OSTI ID:: 1510150

Alternate ID(s):: OSTI ID: 1422929

Report Number(s):: LA-UR-17-31234; 7

Journal Information:: Materials Research Letters, Journal Name: Materials Research Letters Vol. 5 Journal Issue: 3; ISSN 2166-3831

Publisher:: Informa UK LimitedCopyright Statement

Country of Publication:: United Kingdom

Language:: English

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Cited by: 19 works

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Direct Observation of Sink-Dependent Defect Evolution in Nanocrystalline Iron under Irradiation El-Atwani, O.; Nathaniel, J. E.; Leff, A. C. Scientific Reports, Vol. 7, Issue 1 https://doi.org/10.1038/s41598-017-01744-x	journal	May 2017
Radiation-Induced Helium Bubbles in Metals Li, Shi-Hao; Li, Jing-Ting; Han, Wei-Zhong Materials, Vol. 12, Issue 7 https://doi.org/10.3390/ma12071036	journal	March 2019

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