| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Bcc-Superalloys
|
| Presentation Title |
High temperature environmental degradation of novel Fe-based BCC Superalloys |
| Author(s) |
Karthikeyan Hariharan, Oswaldo Luengas, Sannakaisa Virtanen, Christopher H. Zenk |
| On-Site Speaker (Planned) |
Karthikeyan Hariharan |
| Abstract Scope |
Fe-based ferritic superalloys based on Fe-Ni-Al-Cr is among the promising BCC/B2 superalloys with potential applications including steam turbines in new energy technologies such as concentrated solar power plants. While previous studies have investigated the mechanical properties and microstructural stability of these alloys, studies do not exist for the environmental degradation at high temperatures. In this work, we study the isothermal, cyclic oxidation behavior of a new Fe-based superalloy in synthetic air. Preliminary results suggest these alloys show an extremely low mass-gain <0.2 mg.cm-2 in synthetic air up to 950oC in 50 hours, the kinetics is enhanced at further higher temperatures. The change in oxidation kinetics is analyzed through changes in nature of oxide scales, changes in underlying microstructure, and evolution of elemental sub-surface concentration using electron microscopy and diffusion modeling in DICTRA. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
High-Temperature Materials, Environmental Effects, Additive Manufacturing |