About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing Materials, Processes and Applications for Energy Industry
|
| Presentation Title |
Heat Treatment Effect on Microstructural and Mechanical Properties of Copper–Nickel Alloys Processed by Wire Arc Additive Manufacturing |
| Author(s) |
Selda Nayir, Jonathan D. Poplawsky, Matthew DeJong, Charles Shane Hawkins, Andres Marquez Rossy, Lisa Smith, Whitney Watters, Jennifer Gaies, Brian Post, Soumya Nag, Craig Blue |
| On-Site Speaker (Planned) |
Selda Nayir |
| Abstract Scope |
Copper-Nickel alloys are primarily used in naval applications requiring high corrosion resistance and structural stability. In this study, 70/30 CuNi alloy samples were fabricated using Wire arc additive manufacturing (WAAM), and heat treated at 650ºC for 1h and 5h. The builds were subjected to tensile testing and microstructural analysis. The results showed that both as-built and heat-treated samples exhibited dendritic structures enriched with Ni, while Cu was primarily located in the interdendritic regions. Electron backscatter diffraction (EBSD) analysis indicated the presence of elongated grains that coarsened slightly after heat treatment. Tensile testing of an as-built samples demonstrated superior yield strength and elongation compared to cast samples at room temperature. After heat treatment, the tensile strength of the parts was further improved while the fracture elongation was reduced. High-resolution characterization of samples revealed the formation of nanosized, Ti-rich precipitates in the heat-treated samples, which were generally absent in the as-built condition. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Copper / Nickel / Cobalt, Characterization |