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- W4387144418 abstract "Abstract Current technology uses steam as the medium to transfer gaseous thermal energy to kinetic energy in turbines. The next generation of power generation will use a higher efficiency medium, supercritical CO2 (sCO2) to facilitate the transfer of energy. Steels have a proven track record of resisting creep and corrosion in steam environments, making them a cost-effective choice for structural components of steam turbines. Alternatively, the creep and corrosion response in sCO2 is more uncertain. This research aggregates and compiles the authors’ research in martensitic/ferritic 9% Cr steel and commercially available alloys 309H and 347H stainless steels. These steels were short-term to medium-term creep tested (> 200 but < 1000 h) in flowing atmospheric pressure CO2 at 650°C for screening of mechanical degradation in CO2 environments. Results are compared to creep tests run in laboratory air. Additionally, the effect of specimen thickness was explored for the austenitic steels. The 9% Cr ferritic steels were degraded in CO2 as evidenced by significant reduction in creep life and ductility (elongation at failure). The austenitic steels showed a more complex pattern of behavior, where some thicknesses exhibited shorter, and others longer, creep life in CO2 relative to air. However, all austenitic steels showed reduced ductility in CO2." @default.
- W4387144418 created "2023-09-29" @default.
- W4387144418 creator A5022582118 @default.
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- W4387144418 date "2023-06-26" @default.
- W4387144418 modified "2023-09-30" @default.
- W4387144418 title "Creep Degradation of Ferritic/Martensitic and Austenitic Steels in CO2 Environment" @default.
- W4387144418 doi "https://doi.org/10.1115/gt2023-100903" @default.
- W4387144418 hasPublicationYear "2023" @default.
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