| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
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Methods, Techniques, and Materials Discovery of Irradiation Effect Using In-situ Microscopy
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| Presentation Title |
Quantifying the Recovery of Irradiated and Cold-worked Zr-2.5Nb Using X-ray and Neutron Diffraction Line Profile Analysis |
| Author(s) |
Levente Balogh, Thalles T.A. Lucas, Fei Long, Aaron Barry, Mark R. Daymond, Donald W. Brown |
| On-Site Speaker (Planned) |
Levente Balogh |
| Abstract Scope |
Recovery kinetics of dislocation structures formed by either cold-work or irradiation are expected to be different due to the dissimilar configuration of lattice dislocations and dislocation loops. Zr-2.5Nb pressure tube (PT) material was irradiated by fast neutrons at 250 deg C which induced dislocation loops, and unirradiated Zr-2.5Nb PT samples were plastically deformed at 250 deg C to introduce a high density of cold-work dislocations. Samples from the irradiated material were in-situ annealed isothermally and measured using neutron diffraction, while the cold-worked samples were annealed isothermally and characterized ex-situ using high resolution synchrotron X-ray diffraction. The diffraction patterns were evaluated by Diffraction Line Profile Analysis (DLPA) to quantitatively characterize the dislocation density and character as a function of annealing time and temperature. The activation energy and the pre-exponential factor of the recovery process was obtained for both the irradiation-induced and cold-work dislocations, and their differences will be discussed in detail. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Characterization, Nuclear Materials, |