About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
|
Environmentally Assisted Cracking: Theory and Practice
|
Presentation Title |
Phase Field Modelling of Stress Corrosion Cracking in Superalloys at High Temperature |
Author(s) |
Mustafa Elsherkisi, Fabian Duarte Martinez, Simon Gray, Gustavo Castelluccio |
On-Site Speaker (Planned) |
Mustafa Elsherkisi |
Abstract Scope |
The reliability of turbine engines strongly depends on the environment through which aircrafts fly. Humidity, contaminants, operating stresses, and temperatures determine the likelihood of cracking. Simultaneous crack initiation at multiple locations lead to crack interaction, either in the form of shielding or coalescence, which has the potential for arresting damage or accelerating catastrophic failures.
This presentation will introduce a novel approach using Phase Field models to evaluate crack propagation and crack interaction in CMSX-4 C-Ring tests. The model assumes that contaminants diffuse and reduce the material critical energy release rate, which enables crack propagation. The model, which is calibrated to enable cracking above a threshold stress, predicts the crack spacing that results in shielding or coalescence. Simulations led to novel experiments designed to prove shielding effects. |
Proceedings Inclusion? |
Planned: |
Keywords |
Modeling and Simulation, Environmental Effects, High-Temperature Materials |