About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
2026 Technical Division Student Poster Contest
|
| Presentation Title |
SPG-71: Alloy and Heat-Treatment Design of a γ'-Strengthened Ni-Based Superalloy for Additive Manufacturing |
| Author(s) |
Chanhee Lee, Pyuck-Pa Choi, Minsoo Jin, Hyeonbeen Noh |
| On-Site Speaker (Planned) |
Chanhee Lee |
| Abstract Scope |
Ni-based superalloys provide outstanding high-temperature strength and oxidation resistance, making them indispensable for gas turbine blades. Additive manufacturing (AM) enables intricate internal cooling channels that can further improve turbine efficiency, but γ′-rich Ni-based superalloys often exhibit severe cracking and other defects during AM. In this study, we designed a Ni-based superalloy specifically for AM to reduce crack susceptibility while retaining high-temperature capability. The as-built microstructure was characterized and compared with microstructures obtained after solution, aging, and alternative multi-step heat treatments. Mechanical properties were evaluated to identify the heat-treatment route that best balances strength and defect tolerance for AM components. The optimized schedule refined the γ/γ′ morphology, alleviated residual-stress-related damage, and improved mechanical performance relative to the as-built condition. These results provide practical guidelines for co-designing alloy chemistry and post-build heat treatment for AM Ni-based superalloys targeting turbine applications. |
| Proceedings Inclusion? |
Undecided |
| Keywords |
Copper / Nickel / Cobalt, Additive Manufacturing, High-Temperature Materials |