About this Abstract |
| Meeting |
MS&T25: Materials Science & Technology
|
| Symposium
|
Additive Manufacturing: Design, Materials, Manufacturing, Challenges and Applications
|
| Presentation Title |
The Influence of LPBF Parameters on Surface Roughness and Corrosion Behavior of CoCr Alloys |
| Author(s) |
Asad Abu Alrub, Mohamad Mahmoud, Mohammad Albakri, Marwa AbdelGawad |
| On-Site Speaker (Planned) |
Asad Abu Alrub |
| Abstract Scope |
This study explores how Laser Powder Bed Fusion (LPBF) parameters affect the surface roughness and corrosion resistance of cobalt-chromium (CoCr) alloy components. Using a Design of Experiments (DoE) approach, laser power, scanning speed, and aspect ratio were varied. Results revealed that laser power and scanning speed were the most influential parameters, with higher laser densities producing smoother surfaces. At high laser densities, the impact of geometry (aspect ratio) was minimal. Electrochemical tests, including potentiodynamic and potentiostatic scans in a saline environment, were conducted to assess corrosion behavior. Key parameters such as corrosion potential (Ecorr), current density (Icorr), passivation onset (Epass), and pitting potential (Epit) were extracted. Samples with lower surface roughness exhibited improved corrosion resistance, characterized by lower Icorr and more stable passive films. These findings indicate that optimizing LPBF parameters can enhance surface quality and corrosion performance, making CoCr alloys more reliable in biomedical and industrial applications. |