About this Abstract |
Meeting |
2024 TMS Annual Meeting & Exhibition
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Symposium
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Mechanical Response of Materials Investigated through Novel In-situ Experiments and Modeling
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Presentation Title |
The Characterization of Local Deformation Fields Around Zirconium Hydrides |
Author(s) |
Hamidreza Abdolvand, Masoud Taherijam, Saiedeh Marashi, Alireza Tondro, Khaled El-Sobahi |
On-Site Speaker (Planned) |
Hamidreza Abdolvand |
Abstract Scope |
One of the main degradation mechanisms of the zirconium alloys used in the core of nuclear reactors is hydrogen embrittlement. The accumulation of hydrogen atoms in the zirconium matrix leads to the formation of zirconium hydrides. Here, high spatial resolution electron backscatter diffraction is used and coupled with crystal plasticity finite element modeling to characterize the state of deformation around zirconium hydrides. The state of deformation around interacting intragranular zirconium hydrides as well as those located at grain boundaries and triple points are studied. Both numerical and experimental results show that the precipitation of hydrides induced large lattice rotations within zirconium matrix. A strong interaction between neighboring hydrides is observed, so as the development of discrete and parallel geometrically necessary dislocation fields. In-situ nano-indentation in a scanning electron microscope is used to understand the effects of such deformation fields on the local mechanical properties of zirconium. |
Proceedings Inclusion? |
Planned: |