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The influence of solute on irradiation damage evolution in nanocrystalline thin-films
Journal article   Open access   Peer reviewed

The influence of solute on irradiation damage evolution in nanocrystalline thin-films

James E. Nathaniel, Gregory A. Vetterick, Osman El-Atwani, Asher Leff, Jon Kevin Baldwin, Pete Baldo, Marquis A. Kirk, Khalid Hattar and Mitra L. Taheri
Journal of nuclear materials, v 543, 152616
Jan 2021
DOI: https://doi.org/10.1016/j.jnucmat.2020.152616
url
http://manuscript.elsevier.com/S0022311520312241/pdf/S0022311520312241.pdfView
Published, Version of Record (VoR) Open

Abstract

Defect density Irradiation damage Nanocrystalline Solute effects Transmission electron microscopy
•Irradiation induced defect densities did not demonstrate an immediate correlation to grain size.•Sample composition was found to affect defect evolution in nanocrystalline systems.•Average defect cluster size ubiquitously decreases as grain size decreases.•Solute addition inhibits defect kinetics and impedes defect agglomeration, i.e. smaller defect cluster size. Grain boundaries (GBs) are considered sinks where mobile defects are attracted and annihilated thereby hampering irradiation damage accumulation. Nanocrystalline (NC) metals characteristically have greater densities of GBs relative to their coarse-grained counterparts hence they are postulated to provide enhanced resistance to irradiation damage. The use of alloying as a means to impart synergistic properties such as corrosion resistance, increased toughness, or improved conductivity is well studied, yet the cooperative effects of solute addition and grain size in the nano-regime is not well understood. In this study, a combination of in situ ion irradiation, transmission electron microscopy (TEM), and automated crystal orientation mapping (ACOM) on model Ni, NiCr, Fe, and FeCr NC thin-films are used to provide experimental evidence that grain size and irradiation induced defect morphology (defect density and size) are not directly correlated due to defect agglomeration, annihilation at sinks, and saturation, while the addition of solute impedes defect mobility, altering the final damage state.

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11 citations in Web of Science
9 citations in Scopus

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Collaboration types
Domestic collaboration
Web of Science research areas
Materials Science, Multidisciplinary
Nuclear Science & Technology
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