| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in the State-of-the-Art of High Temperature Alloys
|
| Presentation Title |
Occurrence of Heteroepitaxial Recrystallization and Following Microstructure Evolution in Polycrystalline Ni-base Superalloy Under Static Annealing |
| Author(s) |
Yonguk Lee, Victoria M Miller |
| On-Site Speaker (Planned) |
Yonguk Lee |
| Abstract Scope |
Heteroepitaxial recrystallization (HeRX), in which a coherent γ matrix templates off the primary γ’ particles, has been reported in hot-worked polycrystalline Ni-base superalloys. The occurrence of HeRX has not been investigated under static annealing conditions, hindering understanding of the grain growth under sub-solvus temperatures. In this work, microstructure evolution in a cast/wrought Ni-base superalloy (ATI 720) will be investigated after deformation (0.01 ~ 0.1 strain) followed by 1-minute heat-treatment and 1-hour heat-treatment. Electron backscattered diffraction and energy dispersive spectroscopy will be conducted to identify the distribution of stored energy and the nucleation and growth of HeRX grains. Under limited strain and separate annealing conditions, the possibility of HeRX nucleation and competition with other conventional static recrystallization mechanisms such as strain-induced boundary migration will be investigated both qualitatively and quantitatively. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
High-Temperature Materials, Characterization, |