| About this Abstract |
| Meeting |
2022 TMS Annual Meeting & Exhibition
|
| Symposium
|
Environmental Degradation of Additively Manufactured Alloys
|
| Presentation Title |
How Part Surfaces Influence Corrosion for a Laser Powder Bed Fusion 316L Stainless Steel |
| Author(s) |
Michael A. Melia, Erin K. Karasz, Kasandra Escarcega Herrera, Jason M Taylor, Samantha G. Rosenberg, Paul G. Kotula, Michael Heiden, Jeffrey M. Rodelas |
| On-Site Speaker (Planned) |
Michael A. Melia |
| Abstract Scope |
The as-printed surface of 316L stainless steel parts produced via laser powder bed fusion (LPBF) is tortuously rough and chemically heterogeneous. This leads to variability in the materials surface properties such as susceptibility to local corrosion. This presentation explores the characterization and quantification of local corrosion susceptibility as it relates to roughness and surface chemistry for LPBF 316L samples. The oxide surface films that formed during the LPBF process were characterized with scanning transmission electron microscopy and energy dispersive spectroscopy, revealing a Si/Mn/Cr rich amorphous oxide that covers nearly the entire as-printed surface, which can lead to a significant increase (>500 mV) to the materials breakdown potential. The machined surface where a part was removed from the build plate was also investigated, showing a reduction in corrosion resistance by 2 orders of magnitude depending on cutting technique.
SNL is managed and operated by NTESS under DOE NNSA contract DE-NA0003525. SAND2021-7650A. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Other, |