About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Phase Transformations and Microstructural Evolution
|
| Presentation Title |
Microstructual Evolution in Hot Isostatically Pressed Ni-Base Superalloy Powders |
| Author(s) |
Brian Welk, Paraic O'Kelly, Gopal Viswanathan, Hamish L. Fraser |
| On-Site Speaker (Planned) |
Hamish L. Fraser |
| Abstract Scope |
A possible processing route for near net-shaped components made of Ni-base superalloys has involved hot isostatic pressing (HIP). However, this particular processing procedure has not been widely used for critical parts, e.g., gas turbine rotors, because of the presence of particles on prior powder boundaries (ppb’s) in the net-shaped solid which tend to inhibit the development of microstructure during subsequent heat-treatment. This has limited the application of this potential processing procedure. The research to be described in this presentation consists of two parts. The first involves the application of characterization of the ppb’s using advanced electron microscopy leading to the introduction of “coincident maps” which permits the degree of coincidence of ppb’s with high angle grain boundaries. This provides a quantitative measure of effectiveness of problem posed by ppb’s. The second part involves the application of physical metallurgy to provide a solution to the problem associated with ppb’s. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Powder Materials, Characterization, High-Temperature Materials |