Abstract
In recent years, the research in the field of hydrogen embrittlement has received a boost due to the role of hydrogen in the green energy transition. Understating hydrogen-microstructure interaction can demystify hydrogen embrittlement mechanisms and help in designing hydrogen resistant materials. The formulation by Sofronis et al[1] pioneered hydrogen diffusion and trapping at the macro-scale for more than three decades now. However, utilizing this formulation at the meso-scale with explicit representation of different microstructure features can be a challenge. The Phase-field method excelled in quantitative prediction of microstructures of technically important alloys, accompanied with powerful meso-scale diffusion models. In order to build on these advances, we propose a hydrogen diffusion and trapping model based on the meso-scale diffusion models. Synthetic microstructures are generated using phase-field method. The diffuse interface concept is utilized to model grain boundary trapping. Finally, the diffusion is coupled with mechanics to illustrate the effect of stresses on the distribution of hydrogen.