About this Abstract |
| Meeting |
2027 TMS Annual Meeting & Exhibition
|
| Symposium
|
Interstitial–Metal Interactions: The Outsized Role of Small Atoms
|
| Presentation Title |
Tracking interstitial hydrogen atoms in metals by using atom probe tomography |
| Author(s) |
Eason Yi-Sheng Chen |
| On-Site Speaker (Planned) |
Eason Yi-Sheng Chen |
| Abstract Scope |
Hydrogen embrittlement threatens the reliability of structural steels required for safe hydrogen transport, storage and use. This presentation introduces our recent efforts to visualize and understand how interstitial hydrogen atoms distribute within metallic microstructures, and how their trapping governs embrittlement resistance. Using cold-drawn high-strength pearlitic steels as a model system, we combine atom probe tomography with cryogenic sample transfer, hydrogen-charging mechanical testing and transmission electron microscopy to directly correlate hydrogen localization with deformation substructures and fracture behavior. Our results demonstrate that specific dislocation configurations can act as strong hydrogen traps, reducing the amount of mobile hydrogen available to promote cracking. These observations validate hydrogen trapping as an effective strategy for mitigating embrittlement, while providing mechanistic insight into microstructure-property-processing relationships in hydrogen-containing metals. The findings offer guidance for designing steels with improved durability, particularly for gas pipeline applications central to the emerging hydrogen economy and other critical hydrogen-facing structural components globally. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Characterization, Iron and Steel, High-Entropy Alloys |