| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Phase Stability in Extreme Environments
|
| Presentation Title |
Understanding the Effect of SO2/SO3 Gaseous Environments on the Mixed Deposit-induced Degradation of Advanced Alloys |
| Author(s) |
Atharva S. Chikhalikar, David Poerschke |
| On-Site Speaker (Planned) |
Atharva S. Chikhalikar |
| Abstract Scope |
Understanding interactions between the ingested deposits and the superalloys/bond coat components is critical for improving the performance and lifetime of next-generation turbine materials. Recent evidence suggests that mixed multi-cation, multi-anion (oxide-sulfate) deposits can accelerate the degradation of alloys at temperatures greater than 950 °C. However, the interplay between the alloy chemistry, gas atmosphere, and deposit composition have been understudied. This work systematically explored the effect of the air - 10 ppm SO2/SO3 environment on the degradation of two advanced alloys in the presence of multiple deposit chemistries. The alloys were pre-oxidized at two different time scales to analyze the effect of thermally grown oxide thickness on the degradation. Samples were characterized using an automated image analysis approach to compare the degradation intensity under varying parameters. The results enhanced our understanding of the effect of the gas atmosphere on the degradation of alloys and its implications for developing next-generation turbine superalloys. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
High-Temperature Materials, Environmental Effects, Characterization |