| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Accelerated Testing to Understand the Long Term Performance of High Temperature Materials
|
| Presentation Title |
Effect of Contaminant Localization on Stress Corrosion Cracking in Ni-Base Superalloys Single Crystals |
| Author(s) |
Mustafa Elsherkisi, Fabian Duarte Martinez, Simon Gray, Gustavo Castelluccio |
| On-Site Speaker (Planned) |
Gustavo Castelluccio |
| Abstract Scope |
Stress corrosion cracking (SCC) can be detrimental for nickel-base superalloys components exposed to harsh environments inside aero-gas turbines. During operation, intake flux deposits contaminants over the blade surfaces, which facilitates crack initiation. Cracking initiates within minutes and propagates at a rate that depends on the temperature, type of contaminants and applied stress.
This work investigates the interaction of cracks in single-crystal turbine blades at intermediate temperatures by integrating experimental and computational methods. We performed tests to quantify the time required for cracking with different contamination patterns along with microscopy characterisation of the damage. In parallel, we developed finite elements simulations using a phase field model calibrated to match the location of the cracks. The results demonstrate that contamination localization controls the shielding or coalescing of cracks and affects components' life. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
High-Temperature Materials, Modeling and Simulation, Mechanical Properties |