About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Phase Stability in Extreme Environments II
|
| Presentation Title |
Atomic-scale Understanding of the Hydrogen Embrittlement Mechanism in Model and Commercial Austenitic Steels Using Cryogenic Transfer Atom Probe Tomography |
| Author(s) |
Zehao Li, Semanti Mukhopadhyay, Tingkun Liu, Dallin J. Barton, Arun Devaraj |
| On-Site Speaker (Planned) |
Zehao Li |
| Abstract Scope |
For the future hydrogen-based clean energy economy, austenitic stainless steels (γ-SS) are increasingly demanded for transporting and storing hydrogen due to their excellent corrosion and fracture resistance. However, γ-SSs may suffer from significant hydrogen-induced degradation, i.e., hydrogen embrittlement (HE) depending on the austenite stability, local H concentration, and H-induced deformation mechanisms. In order to establish a basis for the rational design and fabrication of γ-SSs with improved HE resistance, it is essential to gain insight into the HE mechanism by clarifying the interaction of hydrogen with various microstructure features in γ-SSs at the atomic scale. In this talk, we will highlight our results on visualizing and quantifying the hydrogen trapping sites in model and commercial γ-SSs using a state-of-the-art cryogenic transfer atom probe tomography (LEAP 6000XR). The effects of deformation and H concentration on the HE in γ-SSs will be elucidated based on detailed microstructure analysis. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Iron and Steel, Mechanical Properties, Characterization |