| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Environmental Degradation of Additively Manufactured Materials
|
| Presentation Title |
Corrosion Mechanisms of Additively Manufactured 316L Stainless Steels in Simulated Seawater |
| Author(s) |
Thomas Voisin, Shohini Sen-Britain, Shinyoung Kang, Yuliang Zhang, Zhen Qi, Seongkoo Cho, Yinmin "Morris" Wang, Brandon Wood |
| On-Site Speaker (Planned) |
Thomas Voisin |
| Abstract Scope |
Additively manufactured 316L stainless steel (316L SS) using laser powder bed fusion technique (L-PBF) exhibits an excellent resistance to pitting corrosion in chloride solutions. Pitting potential of the L-PBF 316L SS can be up to 4 times higher than the conventional, well annealed counterpart. However, most investigations were conducted on well-polished surfaces, and little is known about the corrosion mechanisms taking place on as-built surfaces where the extreme conditions during LPBF lead to rough surfaces and complex surface oxides.
In this talk, we will show that slags that form during LPBF act as pit nucleation sites and the surface oxide on as-built parts contains a thin layer of Mn-rich silicon oxide that formed at high temperature during LPBF, offering exceptional corrosion protection. This work was performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Environmental Effects, Solidification |