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 |
Using In-situ Synchrotron X-ray Scattering to Determine the TTT Diagram of U-6Nb |
Author(s) |
Nathan E. Peterson, Jianzhong Zhang, Don Brown, Bjorn Clausen, Eloisa Zepeda-Alarcon, Erik Watkins, Elena Garlea, Sean Agnew |
On-Site Speaker (Planned) |
Nathan E. Peterson |
Abstract Scope |
The U-Nb system exhibits a rather complex phase transformation landscape, including metastable phases which form by both martensitic and diffusional transformation mechanisms. It is known that the high temperature BCC solid solution phase of U-6 wt% Nb is not stable at room temperature, and at higher temperatures (300-600°C), the phase transformation process begins within seconds. Rapid, in-situ synchrotron x-ray diffraction and small angle scattering measurements have been performed on U-6Nb samples in order to develop accurate time-temperature-transformation(TTT) data for this material. Of special interest in this study is determining the time to the “nose” of the TTT diagram. Complicating factors in the analysis include the presence of multiple phases with the same BCC crystal structure but each having distinct levels of Nb in solution. |
Proceedings Inclusion? |
Planned: |
Keywords |
Nuclear Materials, Phase Transformations, Characterization |