About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing of Metals: Multiscale and Non-Equilibrium Solidification Fundamentals
|
| Presentation Title |
Development of an Additively-Manufacturable Inconel 939-Type Nickel-Based Superalloy with Minimized Crack Susceptibility |
| Author(s) |
Dong Whan Kim, Min Seok Kim, Eun Soo Park |
| On-Site Speaker (Planned) |
Dong Whan Kim |
| Abstract Scope |
Inconel 939 is a nickel-based superalloy known for its exceptional creep and oxidation resistance. However, the alloy faces major challenges under welding and additive manufacturing (AM) conditions, primarily due to its high crack susceptibility. This study proposes a novel alloy system with enhanced crack resistance and improved AM-ability by optimizing its freezing range and crack susceptibility index. Through the controlled reduction of specific elements including Ti, Nb, and C, the modified Inconel 939-type alloy demonstrated significant improvements in the key weldability indices while maintaining its γ’ fraction and mechanical properties. The additively manufactured samples exhibited minimized porosity and excellent as-built ductility, which confirm the promising AM-ability of the novel system. These findings would offer a new approach to designing AM-friendly nickel-based superalloys.
This work was supported by Korea Research Institute for Defense Technology Planning and Advancement-Grant funded by Defense Acquisition Program Administration (DAPA) (No. KRIT-CT-23-042-03). |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Copper / Nickel / Cobalt, Additive Manufacturing, High-Temperature Materials |