| About this Abstract |
| Meeting |
MS&T24: Materials Science & Technology
|
| Symposium
|
Advances in High-Temperature Oxidation and Degradation of Materials for Harsh Environments: A SMD and FMD Symposium Honoring Brian Gleeson
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| Presentation Title |
Moving from Empirical to Physics-Based Understanding of Deposit-induced Corrosion on Gas Turbine Airfoils |
| Author(s) |
Xuan Liu |
| On-Site Speaker (Planned) |
Xuan Liu |
| Abstract Scope |
High temperature degradation of Ni-based alloys and coatings continue to persist despite efforts to mitigate the problem over the past decades. Physics-based models have filled gaps where traditional empirical lifing systems have been challenged. Emerging experimental techniques and methods to look at “mixed mode” corrosion in aircraft gas turbine airfoils has led to a need of more complex physics-based understanding of such mechanisms. These experimental techniques attempt to correlate complex field deposits rich in “CMAS” and “Sulfates” to lab-derived deposits while replicating dominant failure modes relevant to turbine failures. Recent results indicate good correlation using such an approach with opportunity to model-enhance. However, additional challenges in the area of stress corrosion cracking (SCC) present a new frontier of understanding and opportunity for the community.
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