About this Abstract |
Meeting |
Superalloys 2024
|
Symposium
|
Superalloys 2024
|
Presentation Title |
E-10: Effect of Free Surface, Oxide and Coating Layers on Rafting in γ-γ' Superalloys |
Author(s) |
Wajih Jbara, Vincent Maurel, Kais Ammar, Samuel Forest |
On-Site Speaker (Planned) |
Vincent Maurel |
Abstract Scope |
Complex microstructure evolution has been observed both bare and coated Ni-based single crystal superalloys. Rafting and γ' depletion are investigated in this study through a brief experimental analysis and a detailed phase field model to account for mechanical-diffusion coupling. The proposed model has been implemented in a finite element code. As a main result, it is shown that rafting, γ' depletion close to free surface/oxide layer or γ' coalescence close to coating layer, and mechanical behavior are strongly coupled. The local additional flux of Al explains this coupling to a large extent. Finally, a discussion of strain localization and local flux of Al paves the way for clarification of these cases that degrade the performance of superalloys. |
Proceedings Inclusion? |
Definite: At-meeting proceedings |