About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
|
Symposium
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Deformation and Damage Mechanisms of High Temperature Alloys
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Presentation Title |
Influence of Gamma’ Precipitates on Recrystallization and Grain Growth Phenomena in Ni Based Superalloys : Smith-Zener Pinning and So Much More |
Author(s) |
Nathalie Bozzolo |
On-Site Speaker (Planned) |
Nathalie Bozzolo |
Abstract Scope |
Due to the rapid evolution of the γ’ phase during forging operations and the strong coupling with recrystallization phenomena, grain size control of wrought γ-γ’ nickel-based superalloys is by far more complex than it is for other alloys such as Inconel 718. A number of specific phenomena observed in different γ-γ’ alloys will be presented, including heteroepitaxial recrystallization and the dissolution and re-precipitation mechanisms that accompany the migration of a recrystallization front and possibly lead to the formation of twin related precipitates. The mechanisms to be modelled to build up a predictive simulation tool for γ-γ’ alloys of course also include the classical Smith Zener pinning phenomenon. The later indeed controls the grain size evolution during solution treatment with no stored energy at play, but the latter is, by far, not the only one that has to be considered to cover a complete forging route. |
Proceedings Inclusion? |
Planned: |
Keywords |
High-Temperature Materials, Shaping and Forming, |