| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Environmentally Assisted Cracking: Theory and Practice
|
| Presentation Title |
Effect of Hydrogen on the Deformation Mechanism and Grain Boundary Decohesion of an Austenitic FeCrNi Alloy |
| Author(s) |
Tingkun Liu, Sarah Uddin, Dallin Barton, Arun Devaraj |
| On-Site Speaker (Planned) |
Tingkun Liu |
| Abstract Scope |
Hydrogen is a clean fuel, but improved infrastructure is needed to enable its safe production, storage, transportation, and wide-scale use, especially in the realm of structural materials. When hydrogen interacts with structural alloys, it can cause significant mechanical property degradation, known as hydrogen embrittlement (HE). Austenitic stainless steels (𝛾-SS) exhibit improved resistance to HE compared to other metals, though are still susceptible to its adverse effects. Better understanding of hydrogen embrittlement mechanisms of 𝛾-SS is crucial for designing more robust materials that can be used in hydrogen infrastructure. Therefore, Fe18Cr14Ni (wt.%) model alloys for 𝛾-SS were chosen for in-situ investigation on the effects of hydrogen-charging on microstructural evolution during three-point bending via electron backscattering diffraction (EBSD). The results indicate the electrochemically charged H enhanced deformation twins and induced grain boundary decohesion. Supported with previously proposed HE mechanisms, this paper provides a comprehensive rationale for these experimental findings. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Environmental Effects, Iron and Steel, Other |