About this Abstract |
| Meeting |
2027 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing and Innovative Feedstock Processing for Multifunctional Materials
|
| Presentation Title |
Hierarchical Microstructure of WAAM Processed Cu-Ni Alloys and Their Susceptibility to Thermal Post-Processing |
| Author(s) |
Selda Nayir, Andres Marquez Rossy, Matthew Boebinger, James Burns, Lisa Smith, Jennifer Gaies, Patrick Korzeniowski, Justin Norkett, Austin Ngo, 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. The alloys system possesses hierarchical microstructure that is susceptible to the applied post heat treatment. 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, and Cu segregated to interdendritic regions. 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, Mechanical Properties |