| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advanced Characterization of High-temperature Alloys: Phase Evolution during Manufacturing and Service-induced Deformation
|
| Presentation Title |
Advanced Characterization of Centrifugally Cast HP40 Reformer Tubes |
| Author(s) |
Thibaut Dessolier, Thomas McAuliffe, Chrétien Hermse, Wouter Hamer, Thomas Benjamin Britton |
| On-Site Speaker (Planned) |
Thomas Benjamin Britton |
| Abstract Scope |
HP40 is an iron-nickel based alloy with good resistance against high temperature creep and carburization, and this makes the alloy well suited for reformer tubes used in hydrogen production. Our tubes were formed using centrifugal casting, where liquid metal is poured into a spinning ceramic mould and a metal tube is cast. In this study, we apply true nm-to-mm characterization using optical, scanning electron microscopy (SEM) energy dispersive X-ray spectroscopy (EDX) & electron backscatter diffraction (EBSD), transmission electron microscopy (TEM) and atom probe tomography (APT) to characterise precipitates in ex-service reformer tubes. In this presentation, we will share state-of-the-art correlative approaches to identify and understand the spatial distributions of different phases and carbides in these alloys and discuss how these structures evolve during service, specifically with decomposition of NbC carbides into G-phase and M6C phase carbides. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
High-Temperature Materials, Characterization, |