Journal article
Temperature effects on the radiation damage morphology in nanocrystalline iron
Scripta materialia, v 213(C), 114607
May 2022
Abstract
While transformations of dislocation-loop character at high temperatures during heavy ion irradiation has been studied for more than two decades, the role of grain size, or high sink density, has not been considered. To interrogate the effect of defect mobility on irradiated nanocrystalline (nc) microstructures at elevated temperatures, detailed in-situ ion irradiation transmission electron microscopy (TEM) studies were carried out. The transformation temperature for the Burgers vector b = 1/2 -to- transition was found to be 450 °C, representing a lower threshold than that found in micron-grain-sized counterparts. The formation of stable b = 1/2 dislocation loops is observed below 400 °C, while at 450∼500 °C, 1/2 loops either transformed into 〈100〉 loops or were absorbed at grain boundaries (GBs). Thus, the substantial absorption of point defects and dislocation loops by GBs over a range of temperatures characteristically changes the defect morphology from large finger-shaped observed in micron-sized grains to small circular shape loops in nc grains.
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Details
- Title
- Temperature effects on the radiation damage morphology in nanocrystalline iron
- Creators
- G. Vetterick - Drexel UniversityC-Y. Hung - Department of Materials Science and Engineering, Johns Hopkins University, Baltimore, MD, 21218 United States of AmericaE. Hopkins - Department of Materials Science and Engineering, Johns Hopkins University, Baltimore, MD, 21218 United States of AmericaJ.K. Balwin - Los Alamos National LaboratoryP. Baldo - Argonne National LaboratoryM.A. Kirk - Argonne National LaboratoryA. Misra - University of MichiganS. He - University of California, Los AngelesJ. Marian - University of California, Los AngelesM.L. Taheri - Drexel University
- Publication Details
- Scripta materialia, v 213(C), 114607
- Publisher
- Elsevier
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Pediatrics
- Web of Science ID
- WOS:000791234300004
- Scopus ID
- 2-s2.0-85124794506
- Other Identifier
- 991019168295204721
InCites Highlights
Data related to this publication, from InCites Benchmarking & Analytics tool:
- Collaboration types
- Domestic collaboration
- Web of Science research areas
- Materials Science, Multidisciplinary
- Metallurgy & Metallurgical Engineering
- Nanoscience & Nanotechnology