About this Abstract |
Meeting |
Superalloys 2024
|
Symposium
|
Superalloys 2024
|
Presentation Title |
D-4: On the Formation of Multiply Coherent γ Grains in a Powder Metallurgy Ni Base Superalloy |
Author(s) |
Yonguk Lee, Cameron Hale, Eric Payton, Victoria Miller |
On-Site Speaker (Planned) |
Yonguk Lee |
Abstract Scope |
In this study, a unique microstructure with γ grains which contain with multiple coherent primary γ' particles is reported. We term these unique features “multiply coherent grains” (MCGs). While the γ grains containing coherent primary γ' particles suggests the heteroepitaxial recrystallization (HeRX) mechanism, HeRX can only explain the presence of a single coherent primary γ', not multiple. Other potential formation mechanisms for the MCGs are examined, and a formation mechanism based on a special case of Smith-Zener pinning-unpinning is proposed. The implications of the proposed mechanism on grain size evolution are discussed. |
Proceedings Inclusion? |
Definite: At-meeting proceedings |