| About this Abstract |
| Meeting |
2022 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advanced Functional and Structural Thin Films and Coatings
|
| Presentation Title |
Surface Chemistry and Subsurface Microstructure of Al 2024-T3 Laser-interference Structured |
| Author(s) |
Adrian S. Sabau, Harry M. Meyer, Donovan Leonard |
| On-Site Speaker (Planned) |
Adrian S. Sabau |
| Abstract Scope |
For adhesive joining and coating applications, non-chemical surface preparation techniques are needed to reduce the environmental impact and associated costs with chemical surface preparation. In this study, the laser-interference technique was employed in a continuous scanning mode to functionalize the surface of Al 2024-T3 for enhanced coating adhesion and corrosion protection. The laser-interference power profile was created by splitting the beam and guiding both beams on the same spot, creating a line-interference pattern on the treated surface. XPS was used to assess the “cleaning” of the surface and the extent of oxide layer regrowth. SEM was used to characterize the sub-surface microstructure modifications, e.g., the heat-affected zone and precipitate dissolution. Aside from demonstrated periodic micron-scale topology, numerous clusters of nano-scale spherical particles were found to be present within ~250 nm below the surface. Also, several bands seem evident in the lower part of the precipitate dissolution area. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Surface Modification and Coatings, Solidification, Process Technology |