| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advancing Current and State-of-the-Art Application of Ni- and Co-based Superalloys
|
| Presentation Title |
Experimental Assessment and Numerical Simulation of Recrystallization Phenomena in Nickel based Superalloy Forgings |
| Author(s) |
Nathalie Bozzolo, Marc Bernacki |
| On-Site Speaker (Planned) |
Nathalie Bozzolo |
| Abstract Scope |
The most usual phenomenon controlling the final grain size while forging nickel based superalloys is known to be dynamic recrystallization proceeding discontinuously through necklace nucleation. Post-dynamic evolutions may nevertheless also be of utmost importance in the control of the final microstructure in a large forging after cooling down to room temperature. Apart from this usual behavior, more exotic phenomena can also take place under specific thermomechanical conditions, among which :
- critical static recrystallization leading to the overgrowth of few grains,
- or heteroepitaxial recrystallization of 𝛾 grains on 𝛾’ primary precipitates,
- or the formation of 𝛾’ precipitates close to a twin relationship with the matrix grain as a result of the interaction between a recrystallization front with preexisting precipitates.
Both the experimental assessment of these phenomena and their simulation will be illustrated in the talk. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |