| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Phase Transformations and Microstructural Evolution
|
| Presentation Title |
In-situ SEM Study of Hydrogen-dislocation Interactions in Ferritic Stainless-steel |
| Author(s) |
Kyung-Shik Kim, Cem Tasan |
| On-Site Speaker (Planned) |
Kyung-Shik Kim |
| Abstract Scope |
Although hydrogen has been reported to have detrimental effects in BCC metals, post-mortem experimental investigations of hydrogen effects has been challenging due to the high diffusivity of hydrogen in this crystal structure. In this research, to overcome this challenge, an in-situ SEM / ECCI based methodology has been employed to study dislocation motion due to hydrogen charging. To this end, an initial density of dislocations was formed by tensile pre-straining a 430 ferritic stainless steel sample to 1%, and then, hydrogen was introduced from the back side using an SEM hydrogen charging setup. As hydrogen was charged, dislocation activity was detected around grain boundaries and inclusions. Further dislocation characterization experiments, and stress calculations were conducted to explain the observed trends. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Iron and Steel, Characterization, Environmental Effects |