| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
2025 Technical Division Student Poster Contest
|
| Presentation Title |
SPG-73: Mesoscale Modeling of Hydrogen Embrittlement in Iron-Hydrogen Alloys |
| Author(s) |
Daniel Lessa Coelho, Nikolas Provatas |
| On-Site Speaker (Planned) |
Daniel Lessa Coelho |
| Abstract Scope |
Hydrogen embrittlement (HE) significantly reduces the ductility and strength of metals such as iron (Fe) and steel alloys, with grain boundaries (GB) acting as sinks for hydrogen atoms (H), making them susceptible to the initiation and propagation of voids. Although experimental studies have improved our understanding of HE, the relationship between solutes in GBs and HE remains unclear, and a unified theory bridging atomic-scale mechanisms and mesoscale microstructure is still lacking. In the current study, we simulate the segregation of H in Fe GBs by using a recently developed phase field crystal (PFC) model extended for two components to describe the Fe-H alloy. We examine the evolution of the microstructure over diffusive time scales, guided by the phase diagram of the proposed model. Our numerical results demonstrate that H weakens the microstructure by reducing the GB separation energy and may lead to voiding when it accumulates along GB. |
| Proceedings Inclusion? |
Undecided |
| Keywords |
Iron and Steel, Mechanical Properties, Modeling and Simulation |