About this Abstract |
Meeting |
2021 TMS Annual Meeting & Exhibition
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Symposium
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Characterization of Nuclear Materials and Fuels with Advanced X-ray and Neutron Techniques
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Presentation Title |
Identifying the Microstructural Origins of Creep Damage in Alloy 617 |
Author(s) |
Mark C. Messner, Xuan Zhang, Meimei Li, Michael McMurtrey |
On-Site Speaker (Planned) |
Mark C. Messner |
Abstract Scope |
Creep damage often dictates the life of high temperature structural components, likely including components in future advanced high temperature nuclear reactors. Past work has developed a standard microstructural model for the nucleation and diffusion-assisted cavitation of voids on grain boundaries. However, there has been little direct experimental validation of this model. This work identifies the microstructural origins of creep damage using X-ray imaging of interrupted notched creep samples of Alloy 617. The approach adopted here is to fuse microresolution computed tomography and near field and far field High Energy Diffraction Microscopy data sets, taken at the Advanced Photon Source, in order to identify the location, size, and morphology of voids in the interrupted samples relative to key microstructural features and the local states of stress. This information will be used to refine microstructural models of creep damage in order to better predict the onset of creep failure in structural components. |
Proceedings Inclusion? |
Planned: |