About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing of Metals: Multiscale and Non-Equilibrium Solidification Fundamentals
|
| Presentation Title |
Microstructure and Thermal Behavior of Inconel–GRCop42 Dissimilar Joints Fabricated via Powder-Based Laser Directed Energy Deposition |
| Author(s) |
Nahal Ghanadi, Zhengming Wang, Kaylani Kam, Ryan knighton, Somayeh Pasebani |
| On-Site Speaker (Planned) |
Nahal Ghanadi |
| Abstract Scope |
Joining dissimilar metals is critical for fabricating multi-material structures, yet additive manufacturing (AM) poses inherent difficulties due to evolving thermal and compositional conditions. In liquid-state AM, effects such as buoyancy, remelting, and Marangoni-driven mixing can result in developing new alloys with wide solidification ranges, increasing susceptibility to cracking. This work explores how powder-based Directed Energy Deposition (P-DED) affects the joining of Inconel 625 to GRCop42. The pairing is chosen for GRCop42’s efficient heat dissipation in high-temperature structures incorporating Inconel. A comprehensive approach combines CALPHAD modeling, arc-melted alloy preparation, and blue laser P-DED to study interfacial microstructures and elemental intermixing. Blue laser-processed microstructures are contrasted with those from an IR laser to assess fusion dynamics. Computational fluid dynamics (Flow3D) is used to simulate melt pool flow, bead morphology, and compositional gradients. This integrated experimental and simulation study advances understanding of microstructural evolution in dissimilar metal joints between Inconel and GRCop42. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, |