About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing Materials, Processes and Applications for Energy Industry
|
| Presentation Title |
Transition Zone Engineering: Grading Inconel to GRCop |
| Author(s) |
Tyler Paul Finch, Jakub Preis, Stephanie Lawson, Somayeh Pasebani |
| On-Site Speaker (Planned) |
Tyler Paul Finch |
| Abstract Scope |
Joining Cu-based dispersion-strengthened alloys with Ni-based superalloys is essential for heat exchanger applications in the energy sector due to the combination of high thermal conductivity and high-temperature strength. However, liquid-state joining methods often result in cracking caused by a liquid-phase immiscibility gap between Cu-rich and Cu-depleted regions. CALPHAD modeling was used to design a transition composition that avoids this immiscibility gap in GRCop-42–Inconel 718 joints. The transition alloy was then fabricated using laser directed energy deposition (LDED) with a blue laser and analyzed for microstructural morphology, thermal conductivity, and microhardness. These results were compared to joints made using an IR laser. Process modeling was employed to optimize LDED conditions and assess fluid flow at the transition interface. This integrated approach offers a framework for developing reliable transition compositions in other dissimilar metal systems. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Copper / Nickel / Cobalt, High-Temperature Materials |