| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Materials Corrosion Behavior in Advanced Nuclear Reactor Environments
|
| Presentation Title |
Corrosion Behaviour of Laser Powder Bed Fused Inconel 625 in Hydrogenated High Temperature Water |
| Author(s) |
Emily Rose Lewis, Alexandra Dickinson-Lomas, Jonathan Duff, Amanda Cruchley, Nick Cruchley, Yu-Lung Chiu, Fabio Scenini, Moataz M. Attallah, Sam Cruchley |
| On-Site Speaker (Planned) |
Emily Rose Lewis |
| Abstract Scope |
Laser powder bed fusion (PBF-LB) introduces enhanced design flexibility for complex geometry components at high temperatures in water-cooled nuclear reactors. PBF-LB Inconel 625 (IN625) Ni superalloy is a prime candidate due to its excellent corrosion resistance, however microstructural and chemical anisotropy remain following building and post-processing. The effect of as-built microstructure, heat treatment, and surface finishing on the short-term (500, 1500 h) corrosion behaviour of PBF-LB IN625 were investigated in hydrogenated high temperature water. Complementary analytical and advanced materials characterisation techniques, including SEM, TEM, EDS, XRD, and EBSD, were employed to evaluate microstructure, and its role on corrosion. The role of grain texture and surface roughness is discussed in the context of oxidation behaviour. A duplex oxide scale formed, comprised of a Ni(Fe,Cr)2O4 crystallite outer layer upon a continuous Cr-rich inner layer. Scale morphology was altered by surface finish, where differences in grain texture were found to enhance spinel growth. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, High-Temperature Materials, Nuclear Materials |