| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Steels in Extreme Environments
|
| Presentation Title |
Impact of hydrogen on the microstructure changes in steels: Ab initio based multiscale approaches |
| Author(s) |
Tilmann Hickel, Ali Tehranchi, Jorg Neugebauer |
| On-Site Speaker (Planned) |
Tilmann Hickel |
| Abstract Scope |
Hydrogen embrittlement is a persistent mode of failure of steels in extreme environments. During the service life of these steels, phase transformations occur and are a key element that determines their response to the service loads. Thus the investigation of the role of H atoms in the relative stability of retained austenite and the other phases present and forming in steels is of great interest. To this end, the concepts of ab initio thermodynamics will be applied. They will be combined with continuum scale simultions in order to simulate longe-range diffusion, the impact of strain effects, as well crack initiation. Fot the latter, the larger execess volume of the hydorgen-rich bcc phase is decisive. The results are compared to experimental studies on the impact of retained austentie on hydrogen embrittlement. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Iron and Steel, Computational Materials Science & Engineering, Hydrometallurgy |