| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Materials and Chemistry for Molten Salt Systems
|
| Presentation Title |
The evolving morphology of porosities in Ni-Cr-based alloys under molten salt corrosion |
| Author(s) |
Yang Yang, Andrew M. Minor, Michael P. Short, Weiyue Zhou |
| On-Site Speaker (Planned) |
Yang Yang |
| Abstract Scope |
The progression of localized corrosion is often accompanied by the development of porosities within materials, creating internal pathways that facilitate the ingress of external environments into the material's interior. Visualizing these porosity networks is crucial for understanding the penetration mechanisms of corrosion. In this study, we employed focused ion beam - scanning electron microscopy (FIB-SEM) 3D tomography techniques to characterize the unique porosity morphologies in several Ni-Cr-based alloys following corrosion in FLiNaK molten salt. We identified a highly localized form of corrosion, termed one-dimensional (1D) wormhole corrosion, which is responsible for the rapid penetration of salt in Ni-20Cr. While similar 1D morphologies were observed in SS 316 and Incoloy 800H, their porosity-network structures differed significantly. Understanding the mechanisms behind the evolution of void morphologies as alloy composition varies holds significant implications for designing materials with enhanced corrosion resistance in molten salt environments. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Characterization, Nuclear Materials, Environmental Effects |