About this Abstract |
| Meeting |
MS&T25: Materials Science & Technology
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| Symposium
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Additive Manufacturing, Directed Energy Deposition of Metals: Processing – Microstructure – Mechanical Property Relationships
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| Presentation Title |
Thermal and Microstructural Analysis of Inconel-GRCop Dissimilar Joint fabricated by Powder-Based Laser Directed Energy Deposition |
| Author(s) |
Nahal Ghanadi, Somayeh Pasebani |
| On-Site Speaker (Planned) |
Nahal Ghanadi |
| Abstract Scope |
Fabricating robust dissimilar metal joints is vital for multi-material components, yet additive manufacturing (AM) presents challenges due to in-process composition and temperature variations. In liquid-state AM, buoyancy, remelting, and Marangoni mixing can form new alloys with broad solidus-liquidus ranges, increasing the risk of solidification cracking. This study investigates how process physics in powder-based Directed Energy Deposition (P-DED) influence dissimilar metal joining by depositing Inconel 625 onto GRCop42. This system is selected for GRCop42’s thermal management capabilities in high-temperature structural applications where Inconel is used. A multi-physics framework integrates CALPHAD predictions, arc-melted alloy fabrication, and blue laser P-DED to assess microstructure and mixing. Microstructures formed with a blue laser are compared to those from an IR laser to evaluate fusion and mixing behavior. A CFD model (Flow3D) simulates thermal fluid flow, bead geometry, and alloy gradients. This integrated modeling and experimental approach improves understanding of microstructure development in dissimilar Inconel-GRCop42 joints. |