About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Environmental Degradation of Additively Manufactured Materials
|
| Presentation Title |
Corrosion Performance of LPBF CoCr Alloys: A DoE Study on Aspect Ratio and Process Parameters |
| Author(s) |
Asad Abu Alrub, Mohamad Mahmoud, Mohammad Albakri, Marwa AbdelGawad |
| On-Site Speaker (Planned) |
Asad Abu Alrub |
| Abstract Scope |
This study investigates how aspect ratio influences the corrosion behavior of cobalt-chromium (CoCr) alloys fabricated using Laser Powder Bed Fusion (LPBF). CoCr alloys are widely used in additive manufacturing due to their excellent mechanical strength, biocompatibility, and corrosion resistance, particularly in biomedical and aerospace applications. A Design of Experiments (DoE) approach was used to evaluate the effects of laser power, scanning speed, and aspect ratios of 0.5, 3, and 5 on surface roughness and corrosion resistance. Results showed that increasing the aspect ratio significantly reduced surface roughness by improving heat distribution during printing. Electrochemical testing, including potentiodynamic and potentiostatic scans, was performed in a saline environment. Samples with smoother surfaces exhibited lower corrosion current densities (Icorr), higher pitting potentials (Epit), and more stable passive layer formation. These findings emphasize the importance of optimizing both LPBF process parameters and part geometry to enhance the performance of CoCr components in corrosive environments. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Other, Other |