About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Mechanics at the Extremes: Bridging Length-Scales From Nanoscale to Bulk
|
| Presentation Title |
Quantifying Nonlinear Effects in Hydrogen–Dislocation Interactions |
| Author(s) |
Jing Luo, Yejun Gu, Jaafar El-Awady |
| On-Site Speaker (Planned) |
Jing Luo |
| Abstract Scope |
Understanding the influence of hydrogen (H) on the dynamic behavior of dislocations is critical for uncovering the fundamental mechanisms underlying hydrogen embrittlement (HE). Recent advances in modeling hydrogen–dislocation interactions (HDI) have enabled mesoscale quantitative insight into HE; however, the necessity of linearizing HDI formulations remains an open question. In this study, we develop a framework for computing the hydrogen distribution and hydrogen-induced stress without invoking linearization. By explicitly capturing the nonlinear effects of hydrogen stress near the dislocation cores, we demonstrate the critical role of localized H-induced stress in dislocation behavior and clarify that these nonlinear effects cannot be attributed to conventional core effects. The key contributors to these nonlinear interactions are systematically identified and analyzed. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Modeling and Simulation, Computational Materials Science & Engineering, Environmental Effects |