| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
Characterization of Nuclear Materials and Fuels with Advanced X-ray and Neutron Techniques
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| Presentation Title |
Multimodal Synchrotron Characterization of Transmutation Products in Structural Materials |
| Author(s) |
David Sprouster, J Trelewicz, D Morrall, X Hu, C Parish, B Wirth, Y Katoh, L Snead |
| On-Site Speaker (Planned) |
David Sprouster |
| Abstract Scope |
Structural materials in advanced fission and fusion reactors are exposed to extreme radiation conditions, that over time lead to the accumulation of transmutation products. These transmutation products have deleterious effects on the thermomechanical properties including severe toughness degradation and thermal conductivity decrease. Recent neutron irradiation experiments with mixed energy spectra have in fact demonstrated that refractory metals and alloys, in particular tungsten, are appreciably susceptible to the formation of nanometer-scale features involving transmutation products (Re and Os), which ultimately degrade the mechanical properties and rapid embrittlement at low irradiation doses. In this work, we employ multimodal synchrotron-based characterization methods to gain insights into the size, shape, and structure of transmutation products for a series of neutron irradiated tungsten specimens. The microstructural insights from the synchrotron characterization compliment modelling and electron microscopy results and shed new light on the size distributions and crystallographic phases of transmutation products that ensue after irradiation. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Characterization, Nuclear Materials, |