| About this Abstract |
| Meeting |
2022 TMS Annual Meeting & Exhibition
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| Symposium
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Environmental Degradation of Additively Manufactured Alloys
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| Presentation Title |
AM Stainless Steel 316L in Corrosive Environment: Features Controlling Pitting and Metal Dissolution
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| Author(s) |
Thomas Voisin, Rongpei Shi, Shohini Sen-Britain, Zhen Qi, Yuliang Zhang, Seongkoo Cho, Yakun Zhu, Josh Kacher, Ibo Matthews, Y. Morris Wang, Roger Qiu, Brandon Wood |
| On-Site Speaker (Planned) |
Thomas Voisin |
| Abstract Scope |
We will present our recent investigations of the performance of additively manufactured 316L stainless steel (AM316L SS) in corrosive solution (NaCl, HCl). Testing different AM316L SS, we show that the rapid solidification-induced chemical heterogeneities and the process-induced high surface roughness do not prevent the as-built material from far exceeding the pitting potential of the conventional 316L SS. Corrosion properties seem to vary with microstructure and oxide thickness. We will first introduce the multi-scale microstructural features that are present in the as-built and annealed AM 316L SS. The second part will intend to answer what is controlling the pitting nucleation and the subsequent metal dissolution. We use a multi-scale experimental and theorical approach with in situ electron microscopy, galvanic corrosion testing, atom force microscopy, ion mass spectroscopy, and phase-field simulations.
This work was performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344.
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| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Environmental Effects, Characterization |