About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
|
Environmentally Assisted Cracking: Theory and Practice
|
Presentation Title |
Creep Degradation of Austenitic Steels in CO2 Environment |
Author(s) |
Kyle Rozman, Richard Oleksak, Ömer Doğan |
On-Site Speaker (Planned) |
Kyle Rozman |
Abstract Scope |
Determining the mechanical properties for materials in CO2 environments is critical for structural alloys in supercritical CO2 power cycle applications. Additionally, to realize the efficiency gains provided by supercritical CO2 power cycles, micro-channel heat exchangers are necessary to transfer heat. In other words, both the mechanical degradation of alloys exposed to CO2 and the effect of material thickness need to be investigated. The authors’ previous research shows the creep life of martensitic steels is degraded in gaseous CO2 environments. The authors also showed that thinner sections of 9Cr-steels and 347h displayed losses of tensile ductility after exposure to gaseous CO2, which is critical for heat exchanger applications with thin sections. This research presents the creep lifetime of austenitic stainless steel, 347H tested in a gaseous CO2 environment. Furthermore, the effect of specimen thickness was investigated with specimens ranging from 2mm to 0.5 mm thick. |
Proceedings Inclusion? |
Planned: |
Keywords |
Environmental Effects, Mechanical Properties, |