About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
|
Symposium
|
Deformation and Damage Mechanisms of High Temperature Alloys
|
Presentation Title |
G-2: The Efficacy of Using Flat Plate Oxidation Data as a Proxy for Active Crack Tip Behavior in Waspaloy |
Author(s) |
Alex M. Jennion, Zachary D. Harris, James T. Burns |
On-Site Speaker (Planned) |
Alex M. Jennion |
Abstract Scope |
The aggressive mechanical and environmental conditions in the hot sections of jet engines leads to creep and oxidation enhanced fatigue damage on high-performance metal components. Understanding the relative contribution of oxidation, cyclic damage accumulation, and creep is needed. Characterization of oxidation at an actively loaded crack tip is complicated, as such, flat plate oxidation behavior is often used as a proxy. The validity of this approach is assessed by characterizing a crack in a fracture mechanics specimen loaded under constant stress intensity at elevated temperatures, chilling it with an argon spray, and cross sectioning the sample to characterize the oxide. These results are compared to flat plate samples elongated between 0 and 18% strain and oxidized under the same conditions. Quantitative comparisons of the oxidation metrics and morphologies are performed and inform evaluation of the efficacy of this approach in the context of understanding and modeling high temperature fatigue behavior. |
Proceedings Inclusion? |
Planned: |
Keywords |
High-Temperature Materials, Environmental Effects, |