About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Steels in Extreme Conditions
|
| Presentation Title |
Understanding Hydrogen Embrittlement in High Mn Duplex and Duplex Stainless Steels |
| Author(s) |
Yuran Kong, Leslie Townsend, Kip Findley, John Speer, Lawrence Cho |
| On-Site Speaker (Planned) |
Lawrence Cho |
| Abstract Scope |
With the expansion of hydrogen fueling infrastructure, material selection for high-pressure hydrogen systems presents a key technical and economic challenge. While austenitic stainless steels are commonly used in these applications due to their resistance to hydrogen embrittlement (HE), their high material cost limits broader deployment. Duplex (ferrite-austenite) steels represent a potential alternative that provides a balance between the superior HE resistance of austenitic steels and the cost advantage of ferritic steels. This study explores the HE behavior of high-manganese duplex and duplex stainless steels through in-situ rising displacement testing under an electrochemical hydrogen charging environment. The work focuses on the influence of microstructural factors including phase fraction, dislocation density, and phase banding orientation relative to the crack path. The orientation of phase banding is shown to play a key role in hydrogen transport and crack propagation, highlighting opportunities to tailor duplex microstructures for enhanced HE resistance in hydrogen service applications. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Iron and Steel, Environmental Effects, |