About this Abstract |
| Meeting |
2026 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2026)
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| Symposium
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2026 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2026)
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| Presentation Title |
Microstructure–Corrosion Relationships in LPBF 316L Stainless Steel |
| Author(s) |
Joshua Owen, Joshua Magiera, Finlay Spence, Robert Kay, Paolo Actis, Xiangdong Xu, Dimitrios Valavanis, Patrick R Unwin |
| On-Site Speaker (Planned) |
Joshua Owen |
| Abstract Scope |
Corrosion behaviour is an increasing concern for metal alloys produced by additive manufacturing (AM) as their industrial adoption expands. AM alloys often exhibit corrosion responses distinct from conventionally processed materials due to process‑induced microstructural heterogeneity, raising questions about long term performance in corrosion‑critical applications. Localised corrosion, particularly pitting, is strongly influenced by microstructural features, yet conventional bulk electrochemical methods can obscure their individual contributions. This challenge is evident in AM alloys, where microstructural effects are frequently inferred from macroscale testing. Here, the corrosion behaviour of wrought 316L stainless steel is compared with an equivalent produced by laser powder bed fusion (LPBF) in 5 mM sulphuric acid. Macroscale electrochemical techniques are complemented by scanning electrochemical cell microscopy (SECCM) and surface analytical techniques. Manganese sulphide (MnS) inclusions were detected in wrought 316L and linked to localised current hotspots, while their absence in AM 316L led to a more uniform passive response. |
| Proceedings Inclusion? |
Undecided |