About this Abstract |
| Meeting |
Materials in Nuclear Energy Systems (MiNES) 2025
|
| Symposium
|
Materials in Nuclear Energy Systems (MiNES) 2025
|
| Presentation Title |
Enabling Dissimilar Metal Integration in Molten Salt Reactors via Additive Manufacturing of Graded Transition Joints |
| Author(s) |
Yong Yang, Alejandro Corrales |
| On-Site Speaker (Planned) |
Yong Yang |
| Abstract Scope |
In molten salt reactor (MSR) systems, 316 stainless steel (SS) is commonly used for structural components, while Hastelloy N is a leading candidate for components in direct contact with molten salt, such as intermediate heat exchangers (HX). Integrating these materials requires robust dissimilar-metal joining techniques to preserve the unique advantages of each alloy. This study demonstrates the fabrication of compositionally graded transition joints between Hastelloy N and 316 SS using laser metal deposition additive manufacturing. Tailored compositional gradients were implemented to mitigate metallurgical incompatibilities, followed by heat treatments to enhance microstructural stability. The joints were evaluated for thermal stability at 650 °C and corrosion resistance in static molten salt. Microstructural and compositional analyses confirm that graded transitions effectively suppress carbon migration and alloying element depletion across the interface, offering a promising pathway for reliable dissimilar metal integration in MSR components. |
| Proceedings Inclusion? |
Undecided |