| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advanced High Strength Steels IV
|
| Presentation Title |
Impact of Cr and Mn on the Hydrogen-carbide Interaction in High-strength Steels |
| Author(s) |
Lekshmi Sreekala, Poulumi Dey, Tilmann Hickel, Jörg Neugebauer |
| On-Site Speaker (Planned) |
Lekshmi Sreekala |
| Abstract Scope |
Understanding hydrogen-assisted embrittlement of advanced high- strength steels is decisive for their application in automotive industry. Since the addition of Cr to the composition of high-Mn steels improves their corrosion resistance and simultaneously changes the microstructure, the influence of Cr and Mn on hydrogen solubility in the context of carbide formation is scientifically challenging. Density functional theory based calculations have been employed to study the hydrogen interaction of carbides and interfaces containing Cr and Mn. Cr has an indirect impact on hydrogen, since it strongly influences the thermal stability of the carbides like cementite and Fe23C6, but the individual Cr atom interacts only weakly with H. On the other hand, Mn has a weaker impact on carbide formation, but its incorporation into the carbides yields a remarkable non-linearity in the interaction with hydrogen, which is not consistent with the H-Mn interaction known in the austenitic steel matrix. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |