| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Characterization of Minerals, Metals and Materials 2025: In-Situ Characterization Techniques
|
| Presentation Title |
Anodization Behavior of Additive Manufactured Aluminum Alloys |
| Author(s) |
Lydia Daum, Stefan Ostendorp, Martin Peterlechner, Gerhard Wilde |
| On-Site Speaker (Planned) |
Lydia Daum |
| Abstract Scope |
The chemical resistance of aluminum alloys is enhanced by forming protective anodic aluminum oxides (AAOs) during anodization. Al-Zr-Fe alloys, which are suitable for additive manufacturing, exhibit mechanical properties comparable to conventionally cast aluminum alloys.
Different Al-Zr-Fe alloys’ microstructures were obtained by severe plastic deformation and varied manufacturing methods. These alloys were anodized in oxalic acid under potentiostatic conditions to assess the influence of different precipitates on the AAO growth.
Cryogenic Transmission Electron Microscopy and 4D-STEM analyses of the AAOs’ interfaces reveal that Fe-rich precipitates remain partially unaffected, while Zr-rich ones anodize with the matrix. Unlike conventional alloys, Al-Zr-Fe alloys do not show void formation within the AAO. This leads to a distinct chemical stability and emphasizes the importance of selecting an advantageous microstructure tailored for the intended application of the protective layer. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Aluminum, Characterization, Surface Modification and Coatings |