| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Environmental Degradation of Additively Manufactured Alloys
|
| Presentation Title |
Comparing the Corrosion Response of Wrought and Cold Sprayed Aluminum Alloys |
| Author(s) |
Luke N. Brewer, Munsu Kim, Ozymandias Agar, Gregory W Kubacki |
| On-Site Speaker (Planned) |
Luke N. Brewer |
| Abstract Scope |
This talk highlights the differences in corrosion behavior between cold sprayed and wrought high strength aluminum alloys: AA2024 and AA7075. Given its low thermal input, cold spray is showing great promise as a solid-state repair process for aircraft structures. The polarization response of high quality, cold sprayed aluminum is measurably, but not significantly, different from wrought materials. Distinct differences in the polarization response as a function of electrolyte chemistry are noted, with cold spray cathodic kinetics being slower than wrought in artificial seawater, but faster in sodium chloride electrolytes. The localized corrosion response is notably different from wrought materials with fewer, deeper pits formed in the cold sprayed material. Localized corrosion in cold sprayed materials initiates at prior particle boundaries as opposed to constituent particles in wrought alloys. Preferential corrosion along intermetallic networks influences the degradation of cold sprayed material, but at a different length scale than in wrought material. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Powder Materials, Aluminum, Surface Modification and Coatings |