About this Abstract |
Meeting |
2020 TMS Annual Meeting & Exhibition
|
Symposium
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Radiation Effects in Metals and Ceramics
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Presentation Title |
Study of Neutron Irradiation Damage of HT-UPS Steel Using Synchrotron X-ray Techniques |
Author(s) |
Sri Tapaswi Nori, Alejandro Figueroa, Jonova Thomas, Gyuchul Park, Walter Williams, Hemant Sharma, Jun-Sang Park, Peter Kenesei, Jonathan Almer, Zhengrong Lee, Mark Warren, Jeff Terry, Maria Okuniewski |
On-Site Speaker (Planned) |
Sri Tapaswi Nori |
Abstract Scope |
High-temperature ultra-fine precipitation strengthened (HT-UPS) steel is a high-strength, creep resistant advanced austenitic stainless steel at elevated temperatures (>400℃). It is a candidate structural material for advanced nuclear reactors. However, its neutron irradiation tolerance is not well understood. In this context, this research utilizes non-destructive synchrotron X-ray techniques such as high-energy diffraction microscopy (HEDM), micro-computed tomography (μ-CT), and X-ray absorption spectroscopy (XAS) to characterize the neutron-irradiation induced defect structures at multiple length scales. HEDM and μ-CT provide three-dimensional micromechanical state information for the grains and microstructural density changes due to the varying compositions within a material, respectively. XAS provides the local chemical environment information around an absorbing atom. These experiments were conducted on samples that were unirradiated and neutron-irradiated up to ~0.3 dpa at ~600℃. A comparative study between these irradiation conditions will be presented to explain the microstructural and micromechanical effects of irradiation. |
Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |