About this Abstract |
Meeting |
2021 TMS Annual Meeting & Exhibition
|
Symposium
|
Accelerated Discovery and Qualification of Nuclear Materials for Energy Applications
|
Presentation Title |
Role of Composition and Thermal Aging on Corrosion Behavior of Duplex Stainless Steels in Pressurized Water Reactors |
Author(s) |
Julie D. Tucker, Pratik Murkute, Kofi Oware Sarfo, Isak McGieson, Melissa Santala, Yongfeng Zhang , Liney Arnadottir, Burkan Isgor |
On-Site Speaker (Planned) |
Julie D. Tucker |
Abstract Scope |
Dual-phase stainless steels are prevalent in nuclear power system welds and castings throughout the plant. Phase separation in the ferrite phase, due to thermal aging, degrades the mechanical properties of these alloys and also impacts the corrosion resistance. In this project, five duplex stainless steels (2101, 2003, 2205, 2101-weld, and 2209-weld) were aged at 427°C for up to 10,000 hours and characterized for phase separation and corrosion performance in a range of pressurized water reactor chemistries containing LiOH and H3BO3. First-principles studies and experimental results are integrated into a phase-field model to simulate the effects of aging on the nucleation and growth of oxide films as a function of alloy composition. This model is also being used to test hypothesized mechanisms for chloride-induced depassivation, suggested by first-principles studies. This approach will allow us to predict performance for new alloys in these reactor environments. |
Proceedings Inclusion? |
Planned: |
Keywords |
Iron and Steel, Computational Materials Science & Engineering, Phase Transformations |