About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Characterization of Minerals, Metals and Materials 2026 - In-Situ Characterization Techniques
|
| Presentation Title |
Direct observation of different hydrogen traps in high-strength steels |
| Author(s) |
Chao Huang, Ranming Niu, Julie M. Cairney, Eason Yi-Sheng Chen |
| On-Site Speaker (Planned) |
Chao Huang |
| Abstract Scope |
Hydrogen embrittlement limits the reliability of high-strength steels in hydrogen infrastructure. Here we report direct, multiscale observations of hydrogen trapping in cold-drawn pearlitic steel, combining TEM, APT, thermal desorption spectroscopy, and in-situ hydrogen-charging mechanical tests. We identify a clear hierarchy of hydrogen traps: dislocations pinned at ferrite/cementite interfaces act as strong, stable traps that suppress embrittlement, while mobile dislocations and carbon vacancies form weak traps that facilitate hydrogen diffusion and cracking. Increasing drawing strain enhances the density and stability of strong traps, correlating with improved embrittlement resistance. These results establish a structure–trapping–property relationship that clarifies the microstructural origins of hydrogen tolerance in cold-drawn steels. The findings provide a pathway for designing steels with intrinsic resistance to hydrogen-assisted failure, critical for the durability of next-generation energy systems. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Characterization, Iron and Steel, Other |