| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Powder Materials Processing and Fundamental Understanding
|
| Presentation Title |
Influence of Heat Treatments on Ni-Based Superalloy Densified by Spark Plasma Sintering : Evolution of PPBs and Grain Boundaries Overlap |
| Author(s) |
Rémi Lebot, Emmanuel Saly, Gautier Huser, Pierre Sallot, Patrick Villechaise, Jonathan Cormier |
| On-Site Speaker (Planned) |
Rémi Lebot |
| Abstract Scope |
Powder Metallurgy has been for long developed for high performance application, such as turbine disks for aero-engines, and relies on very specific alloys compositions. This historical technology was relying on Hot Isostatic Pressing only to produce « near-net shape » parts by sintering. However, it was demonstrated that as-sintered Ni-based superalloys powders present detrimental prior particle boundaries (PPBs), located at the powder surfaces and decorating grain boundaries in the final microstructure, which became preferential sites for crack initiation.
This study will revisit these statements with the analysis of superalloy powders densified with the Spark Plasma Sintering process. Close attention to microstructures and PPBs structure will be analysed and discussed in relation to mechanical properties on the as-sintered state and after heat treatments. A conclusion on the possible positive impact of SPS densification on final properties will be proposed. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Other, High-Temperature Materials, Mechanical Properties |