About this Abstract |
| Meeting |
2027 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Surface Engineering IX
|
| Presentation Title |
Comparative Corrosion and Surface Film Evolution of an Additively Manufactured and Cast Cu Alloy |
| Author(s) |
Mohamed Hashir Hussein, Rajeev Gupta, Kevin Eckes |
| On-Site Speaker (Planned) |
Mohamed Hashir Hussein |
| Abstract Scope |
Corrosion resistance of Cu-Ni alloys rely on protective surface films in chloride environments, but laser powder bed fusion changes the microstructure, controlling film formation. This study compares corrosion and surface-film evolution in laser powder bed fusion and cast Cu-Ni alloy after exposure to 0.6 M NaCl. Potentiodynamic polarization, immersion testing, scanning electron microscopy, focused ion beam sectioning, and scanning transmission electron microscopy/energy-dispersive spectroscopy were used to relate corrosion response to cross-sectional film chemistry. The laser powder bed fusion alloy exhibited a passive region and breakdown potential, with corrosion current densities and breakdown potentials comparable to or slightly better than the cast alloy. Microscopy showed processing-dependent film architectures: the cast alloy developed a thicker, spatially heterogeneous, Cu-rich outer/Ni-rich inner layered film, while the additively manufactured alloy formed a thinner external film with localized internal corrosion associated with cellular microstructural features. These results connect processing route, microstructure, and chloride-induced degradation in Cu-30Ni. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Copper / Nickel / Cobalt, Characterization |