|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Materials and Fuels for the Current and Advanced Nuclear Reactors VII
||Atom Probe Examinations of Zircaloy Irradiated at 358-410C
||Brian Vern Cockeram, Phil D. Edmondson, Keith J. Leonard, Jim L. Hollenbeck
|On-Site Speaker (Planned)
||Brian Vern Cockeram
Atom Probe Tomography (APT) examinations were performed on Zircaloy-2 and Zircaloy-4 following irradiation in the Advanced Test Reactor (ATR) and the High Flux Isotope Reactor (HFIR) to neutron fluences of 2.9-3.1x1025 n/m2 (E>1 MeV) . Irradiation at higher temperatures of 358-410C resulted in about 10-60% less hardening than observed in the literature for irradiations at 260-326C. The clustering of Fe, Sn, and Cr at features consistent with <a> loops and line dislocations was observed. Isolated clusters of Fe, Sn, and Cr were also observed. These features likely result in the high barrier strength for dislocation loops that corresponds to the measured irradiation hardening. However, local variation in the distribution of clusters is observed that is related to the local microstructure and proximity to precipitates. Differences in irradiated microstructure related to neutron flux are discussed.
 B.V. Cockeram et al., Journal of Nuclear Materials, Vol. 449 (2014) 69.
||Planned: Supplemental Proceedings volume