Fracture Mechanics and Strength of Materials

Hydrogen Diffusion and Trapping in Materials: the Effect of Temperature and Plastic Strain

Nazar Hembara, Yaroslav Sapuzhak

Karpenko Physico-Mechanical Institute of NAS of Ukraine

https://doi.org/10.15407/msse2025.01.185

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Keywords

hydrogen, energy traps, plastic strain, Fick’s model, temperature

Abstract

The study presents mathematical modeling of hydrogen distribution in steel material, taking into account average energy traps. The dependencies of mobile (diffusible) and trapped hydrogen concentrations on temperature in the range of 300–600 K and accumulated plastic strain are examined. An extended Fick’s model incorporating hydrogen trapping/release by traps is applied. The obtained results demonstrate a nonlinear nature of parameter interactions, particularly the dominance of trapped hydrogen at low temperatures and high strain levels.

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