Atom probe examinations of Zircaloy irradiated at nominally 358 °C
Abstract
Zircaloy-2 and Zircaloy-4 were neutron irradiated at 358 °C in the high flux isotope reactor (HFIR) to a neutron fluence of 29.6 × 1024 n/m2 (E > 1 MeV) and the resultant irradiation hardening was measured by tensile testing. Irradiation at the relatively high temperature of 358°C resulted in about 25–45% less hardening than observed in the literature for irradiations at 260–326°C. The lower irradiation hardening was shown to result from a coarser < a > loop distribution. The measured irradiation hardening was closely related to the ⟨a⟩ loop size and number density (ND) using an Orowan hardening model when the loops were assumed to be strong barriers like voids. In this work Atom Probe Tomography (APT) was used to detect the clustering of Fe, Sn, and Cr at features consistent with < a > loops. The tendency for clustering of Fe, Sn, and Cr at < a > loops could result in the apparent high barrier strength for these features. These clusters are also an additional hardening barrier. However, local variation in the distribution of clusters is observed from region to region in the irradiated material that appears to be related to factors such as the proximity to precipitates,more »
- Authors:
- Publication Date:
- Research Org.:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC)
- OSTI Identifier:
- 1529736
- Alternate Identifier(s):
- OSTI ID: 1558571
- Grant/Contract Number:
- AC05-00OR22725
- Resource Type:
- Published Article
- Journal Name:
- Nuclear Materials and Energy
- Additional Journal Information:
- Journal Name: Nuclear Materials and Energy Journal Volume: 19 Journal Issue: C; Journal ID: ISSN 2352-1791
- Publisher:
- Elsevier
- Country of Publication:
- Netherlands
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; Zircaloy; Irradiation Effects; Hardening; Clustering
Citation Formats
Cockeram, B. V., Edmondson, P. D., Leonard, K. J., Kammenzind, B. F., and Hollenbeck, J. L. Atom probe examinations of Zircaloy irradiated at nominally 358 °C. Netherlands: N. p., 2019.
Web. doi:10.1016/j.nme.2019.03.023.
Cockeram, B. V., Edmondson, P. D., Leonard, K. J., Kammenzind, B. F., & Hollenbeck, J. L. Atom probe examinations of Zircaloy irradiated at nominally 358 °C. Netherlands. https://doi.org/10.1016/j.nme.2019.03.023
Cockeram, B. V., Edmondson, P. D., Leonard, K. J., Kammenzind, B. F., and Hollenbeck, J. L. Wed .
"Atom probe examinations of Zircaloy irradiated at nominally 358 °C". Netherlands. https://doi.org/10.1016/j.nme.2019.03.023.
@article{osti_1529736,
title = {Atom probe examinations of Zircaloy irradiated at nominally 358 °C},
author = {Cockeram, B. V. and Edmondson, P. D. and Leonard, K. J. and Kammenzind, B. F. and Hollenbeck, J. L.},
abstractNote = {Zircaloy-2 and Zircaloy-4 were neutron irradiated at 358 °C in the high flux isotope reactor (HFIR) to a neutron fluence of 29.6 × 1024 n/m2 (E > 1 MeV) and the resultant irradiation hardening was measured by tensile testing. Irradiation at the relatively high temperature of 358°C resulted in about 25–45% less hardening than observed in the literature for irradiations at 260–326°C. The lower irradiation hardening was shown to result from a coarser < a > loop distribution. The measured irradiation hardening was closely related to the ⟨a⟩ loop size and number density (ND) using an Orowan hardening model when the loops were assumed to be strong barriers like voids. In this work Atom Probe Tomography (APT) was used to detect the clustering of Fe, Sn, and Cr at features consistent with < a > loops. The tendency for clustering of Fe, Sn, and Cr at < a > loops could result in the apparent high barrier strength for these features. These clusters are also an additional hardening barrier. However, local variation in the distribution of clusters is observed from region to region in the irradiated material that appears to be related to factors such as the proximity to precipitates, local variations in microstructure, and/or microchemistry.},
doi = {10.1016/j.nme.2019.03.023},
journal = {Nuclear Materials and Energy},
number = C,
volume = 19,
place = {Netherlands},
year = {Wed May 01 00:00:00 EDT 2019},
month = {Wed May 01 00:00:00 EDT 2019}
}
https://doi.org/10.1016/j.nme.2019.03.023
Web of Science
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