Journal article
Insight into defect cluster annihilation at grain boundaries in an irradiated nanocrystalline iron
Journal of nuclear materials, v 566, 153761
01 Aug 2022
Abstract
•Defect clusters dynamic were examined using in-situ irradiation TEM.•One-dimensional loop hop to GB was revealed.•Burgers-vector rotation mechanism near GB was revealed.•Cluster dynamics marked effects on the morphology of the irradiated microstructure.
The design of radiation-tolerant polycrystalline materials has been mainly based on the control and manipulation of grain boundaries (GBs) that leads to annihilation of point defects at grain-boundary neighborhoods thus resulting in the formation of defect denuded zones. Nanocrystalline materials are potential candidates providing large density defect sinks for individual point defects and small highly mobile defect clusters (DCs). Using the in-situ irradiation transmission electron microscopy (TEM) technique, this study not only experimentally revealed the coalescence of small glissile DCs at/near GB and their subsequent annihilation at grain-boundary, but also provide insight into defect cluster dynamics. The small DCs were found to be transported to grain-boundary neighborhoods where they can annihilate by the one-dimensional loop hop or Burgers-vector rotation mechanism to GBs, considered as the main contribution to the long-range flux of interstitials to GB sinks. This process had marked effects on the morphology of the irradiated microstructure in nanocrystalline iron, limiting the length of DC strings and reducing the coalescence of DCs into large clusters (dislocation loops).
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Details
- Title
- Insight into defect cluster annihilation at grain boundaries in an irradiated nanocrystalline iron
- Creators
- C.Y. Hung - Department of Materials Science and Engineering, Johns Hopkins University, Baltimore, MD, 21218G. Vetterick - Drexel UniversityE. Hopkins - Department of Materials Science and Engineering, Johns Hopkins University, Baltimore, MD, 21218J.K. Balwin - Los Alamos National LaboratoryP. Baldo - Argonne National LaboratoryM.A. Kirk - Argonne National LaboratoryA. Misra - University of MichiganM.L. Taheri - Department of Materials Science and Engineering, Johns Hopkins University, Baltimore, MD, 21218
- Publication Details
- Journal of nuclear materials, v 566, 153761
- Publisher
- Elsevier
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Pediatrics
- Web of Science ID
- WOS:000805635200003
- Scopus ID
- 2-s2.0-85130855546
- Other Identifier
- 991019169570704721
InCites Highlights
Data related to this publication, from InCites Benchmarking & Analytics tool:
- Collaboration types
- Domestic collaboration
- Web of Science research areas
- Materials Science, Multidisciplinary
- Nuclear Science & Technology