About this Abstract |
Meeting |
Superalloys 2024
|
Symposium
|
Superalloys 2024
|
Presentation Title |
Influence of the Coating Brittleness on the Thermomechanical Fatigue Behavior of a β-NiAl Coated R125 Ni-based Superalloy |
Author(s) |
Capucine Billard, Damien Texier, Matthieu Rambaudon, Jean-christophe Teissedre, Dimitri Marquie, Lionel Marcin, Hugo Singer, Noureddine Bourhila, Vincent Maurel |
On-Site Speaker (Planned) |
Vincent Maurel |
Abstract Scope |
The brittleness of an aluminide diffusion coating protecting a Ren´e 125 Ni-based polycrystalline superalloy was investigated over a wide range of temperatures in its as-received and thermally aged form. Isothermal and thermal cycled aging were performed on the coated system at a maximum temperature of 1100 °C. Microstructure evolutions and damage initiation within the coating were characterized. Interrupted tensile tests and thermomechanical fatigue tests were conducted to document critical stress-strain conditions leading to the coating cracking and lifetime for the case of thermo-mechanical fatigue loading. Advanced digital image correlation and acoustic emission techniques were used to detect coating cracking. Isothermal oxidation or cyclic oxidation led to improved strain-to-failure due to metallurgical evolutions and also longer fatigue life under thermomechanical fatigue conditions. |
Proceedings Inclusion? |
Definite: At-meeting proceedings |