High-energy x-ray diffraction microscopy study of deformation microstructures in neutron-irradiated polycrystalline Fe-9%Cr
Abstract
In this paper, we used far-field high-energy x-ray diffraction microscopy (FF-HEDM) to measure in 3D the spatial distributions of the sizes, orientations, and residual strains of grains and subgrains formed by room-temperature tensile deformation in a neutron-irradiated (450 °C, 0.01dpa) Fe-9Cr specimen and its unirradiated counterpart. We found that neutron irradiation under this condition alone had no effect on the grain size distribution. After deformation, grains fragmented into subgrains in both unirradiated and irradiated specimens: the irradiated specimen contained a few large subgrains which co-existed with many smaller subgrains, while the unirradiated specimen contained small subgrains with a relatively uniform size distribution. Prior to deformation, the irradiated specimen had higher residual strain spread compared to its unirradiated counterpart, while after deformation to the maximum uniform elongation, the strain distributions among subgrains were similar between the unirradiated and irradiated specimens. The FF-HEDM measurements provide new insight into the effects of neutron irradiation on the mechanical response of Fe-Cr ferritic alloys.
- Authors:
-
- Argonne National Lab. (ANL), Lemont, IL (United States)
- Publication Date:
- Research Org.:
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Sponsoring Org.:
- USDOE Office of Nuclear Energy (NE), Nuclear Energy Enabling Technologies (NEET); USDOE
- OSTI Identifier:
- 1467466
- Alternate Identifier(s):
- OSTI ID: 1495278
- Grant/Contract Number:
- AC02-06CH11357
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Journal of Nuclear Materials
- Additional Journal Information:
- Journal Volume: 508; Journal Issue: C; Journal ID: ISSN 0022-3115
- Publisher:
- Elsevier
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; Ferritic alloy; high-energy x-ray diffraction microscopy; mechanical deformation; neutron irradiation
Citation Formats
Zhang, Xuan, Li, Meimei, Park, Jun-Sang, Kenesei, Peter, Sharma, Hemant, and Almer, Jonathan. High-energy x-ray diffraction microscopy study of deformation microstructures in neutron-irradiated polycrystalline Fe-9%Cr. United States: N. p., 2018.
Web. doi:10.1016/j.jnucmat.2018.06.004.
Zhang, Xuan, Li, Meimei, Park, Jun-Sang, Kenesei, Peter, Sharma, Hemant, & Almer, Jonathan. High-energy x-ray diffraction microscopy study of deformation microstructures in neutron-irradiated polycrystalline Fe-9%Cr. United States. https://doi.org/10.1016/j.jnucmat.2018.06.004
Zhang, Xuan, Li, Meimei, Park, Jun-Sang, Kenesei, Peter, Sharma, Hemant, and Almer, Jonathan. Mon .
"High-energy x-ray diffraction microscopy study of deformation microstructures in neutron-irradiated polycrystalline Fe-9%Cr". United States. https://doi.org/10.1016/j.jnucmat.2018.06.004. https://www.osti.gov/servlets/purl/1467466.
@article{osti_1467466,
title = {High-energy x-ray diffraction microscopy study of deformation microstructures in neutron-irradiated polycrystalline Fe-9%Cr},
author = {Zhang, Xuan and Li, Meimei and Park, Jun-Sang and Kenesei, Peter and Sharma, Hemant and Almer, Jonathan},
abstractNote = {In this paper, we used far-field high-energy x-ray diffraction microscopy (FF-HEDM) to measure in 3D the spatial distributions of the sizes, orientations, and residual strains of grains and subgrains formed by room-temperature tensile deformation in a neutron-irradiated (450 °C, 0.01dpa) Fe-9Cr specimen and its unirradiated counterpart. We found that neutron irradiation under this condition alone had no effect on the grain size distribution. After deformation, grains fragmented into subgrains in both unirradiated and irradiated specimens: the irradiated specimen contained a few large subgrains which co-existed with many smaller subgrains, while the unirradiated specimen contained small subgrains with a relatively uniform size distribution. Prior to deformation, the irradiated specimen had higher residual strain spread compared to its unirradiated counterpart, while after deformation to the maximum uniform elongation, the strain distributions among subgrains were similar between the unirradiated and irradiated specimens. The FF-HEDM measurements provide new insight into the effects of neutron irradiation on the mechanical response of Fe-Cr ferritic alloys.},
doi = {10.1016/j.jnucmat.2018.06.004},
journal = {Journal of Nuclear Materials},
number = C,
volume = 508,
place = {United States},
year = {Mon Jun 04 00:00:00 EDT 2018},
month = {Mon Jun 04 00:00:00 EDT 2018}
}
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Figures / Tables:
Figure 1: Sketch of FF-HEDM experimental setup for the irradiated sample. Top right corner shows a tensile-deformed sample. The deformed area measured by FF-HEDM was sampled on the gauge section away from the necking center, and the undeformed area was sampled underneath the pin hole in the grip section. Bottommore »