About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing of Metals: Multiscale and Non-Equilibrium Solidification Fundamentals
|
| Presentation Title |
Additive manufacturing of Co-based superalloys via direct ink writing |
| Author(s) |
Jian Liu, Wen Chen |
| On-Site Speaker (Planned) |
Jian Liu |
| Abstract Scope |
Additive manufacturing of superalloys enables innovative, geometrically complex designs combined with excellent mechanical properties. Here, we developed an additive manufacturing method based on direct ink writing (DIW), to fabricate a high-performance Co-based superalloy. The ink consists of metal powders, polymer binders, and volatile solvents. The deposited architectures are thermally sintered to near-full density, followed by ageing. The sintered Co-based superalloy exhibits homogeneous microstructure of equiaxed grains with MC carbides uniformly distributed in the FCC matrix, which lead to a high ultimate tensile stress in excess of 1.2 GPa and a large tensile ductility over 20% at room temperature. The outstanding combination of strength and ductility originates from the coherent γ′ nanoprecipitates and deformation-induced stacking faults, as revealed by in situ synchrotron X-ray diffraction and high-resolution transmission electron microscopy. The introduced additive manufacturing approach provides new opportunities to print a wide range of superalloys for high-temperature applications. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Process Technology, Copper / Nickel / Cobalt |