About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing Modeling, Simulation and Artificial Intelligence
|
| Presentation Title |
Toward Processing Compositional Gradients of Thermally Dissimilar Nickel and Copper Alloys with Laser Powder Directed Energy Deposition (LP-DED) |
| Author(s) |
Li Ma, Alex Lark, Mo-Rigen He, Maddy Selby, Kevin Hemker, Gianna M. Valentino |
| On-Site Speaker (Planned) |
Li Ma |
| Abstract Scope |
Laser powder directed energy deposition (LP-DED) enables the fabrication of functionally graded materials (FGMs) that transition smoothly between Inconel 625’s high mechanical strength and GRCop-42’s high thermal resilience, ideal for enhancing liquid rocket combustion chamber performance in extreme thermal environments. However, understanding material mixing and thermal stresses is important to address challenges associated with a dissimilar alloy interface. This work develops a computational fluid dynamics (CFD) model to simulate single-track, multi-layer LP-DED of Inconel 625 and GRCop-42 toward enabling their eventual co-deposition. The modeled melt pool dimensions of each layer align closely with experimental results, validating the simulation. Modeling provides detailed insights into melt pool flow, thermal behavior, cooling rate, temperature gradients, and material mixing dynamics in each layer. The integrated use of experimental data and CFD process modeling provides a path forward to optimizing process parameters, enabling robust multi-material additive manufacturing, and addressing challenges in joining thermally dissimilar alloys. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Modeling and Simulation, Copper / Nickel / Cobalt |