| About this Abstract |
| Meeting |
MS&T23: Materials Science & Technology
|
| Symposium
|
Additive Manufacturing: Design, Materials, Manufacturing, Challenges and Applications
|
| Presentation Title |
Surface Patterning of Sacrificial Nodules Using L-PBF in Improving Corrosion Properties of Lightweight Al-Mg Alloy |
| Author(s) |
Fanyue Kong, Minh Tran, Elena Romanovskaia, Valentin Romanovski, Ji Ma, John Scully |
| On-Site Speaker (Planned) |
Fanyue Kong |
| Abstract Scope |
Aluminum and magnesium alloys are widely used in aircraft and spacecraft manufacturing due to the high strength-to-weight, however, their corrosion resistance often requires further improvement. We introduce a strategy of surface and sub-surface patterning of sacrificial anode nodules that interfere with corrosion triggers and driving forces. Utilizing additive manufacturing ability to create geometry surface patterns with dissimilar materials. In this study, elemental zinc and magnesium surface nodules are fabricated using a laser powder bed fusion (L-PBF) approach to improve the corrosion resistance of AA5456 and AZ31B alloys, respectively. We investigated the effect of process parameters on corrosion properties, microstructure, and sub-surface composition gradients. Results from open circuit potential test shows potential of AA5456 drops from -0.9 V to -1.15V, indicating the ability for surface pattern to reduce the potential to start corrosion. |