About this Abstract |
| Meeting |
2027 TMS Annual Meeting & Exhibition
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| Symposium
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Interstitial–Metal Interactions: The Outsized Role of Small Atoms
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| Presentation Title |
Atomic- to nanoscale mechanisms driving carburization-enhanced corrosion resistance and strength in AM 316L |
| Author(s) |
Huanyu Tan, Lu Zhang, Rui Yang, Yakun Zhu, Luning Wang |
| On-Site Speaker (Planned) |
Yakun Zhu |
| Abstract Scope |
Low-temperature carburization (LTC) improves corrosion resistance and mechanical properties in conventional stainless steels, but its effects on additively manufactured (AM) 316L remain unclear because of cellular substructures, elemental segregation, and residual stress. Here, laser powder bed fusion 316L was subjected to LTC to examine how interstitial carbon modifies the carburized layer and governs corrosion and mechanical behavior. LTC increased passive current and breakdown potential through improved conductivity and transpassive stability, while enhancing strength and ductility relative to untreated material. Microscopic and spectroscopic analysis at atomic- to nanoscale links these improvements to changes in the electronic structure and coordination environment of lattice Fe and Cr. Overall, LTC provides AM 316L with improved strength–ductility balance, stronger pitting resistance, and higher passive-film conductivity. |
| Proceedings Inclusion? |
Planned: |