2024/06/18 by Wajih Jbara, Vincent Maurel, Jbara, Wajih +5
Engineering · Materials Science · #Applied Physics (physics.app-ph) #FOS: Physical sciences #High Temperature Alloys and Creep #Metallurgy and Material Forming #Solidification and crystal growth phenomena
paper · pdf · doi:10.48550/arxiv.2406.13061
openalex publication_date 2024/06/18 · openalex created_date 2024/06/22 · openalex updated_date 2026/08/01
Complex microstructure evolution has been observed \revboth 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.