| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Environmental Degradation of Additively Manufactured Materials
|
| Presentation Title |
Microstructural and Compositional Distribution Effects on LPBF CuNi Corrosion |
| Author(s) |
Robert G. Kelly, Timothy Montoya, Finley Pettitt |
| On-Site Speaker (Planned) |
Robert G. Kelly |
| Abstract Scope |
The solidification pathways of additively manufactured metallic materials lead to important differences in microstructure compared to conventional processing which can lead to important differences in corrosion behavior even if the mechanical properties are able to meet performance requirements. Laser Powder Bed Fusion (LPBF) processing creates highly non-equilibrium microstructures, including a range of defects that are not observed in traditionally manufactured alloys, although their impact on corrosion resistance is poorly understood, particularly in CuNi alloys. In this work, the impact of LPBF manufacturing parameters on CuNi microstructure and corrosion resistance in both quiescent chloride solutions will be compared to that of traditionally manufactured material. The observation of apparent grain boundary separation in as-printed material and its extension during corrosion will be demonstrated and its origins described. The impact of post-manufacture heat treatment on corrosion rate, passive film formation, and corrosion morphology will also be discussed. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Other, Solidification, |