Fracture Mechanics and Strength of Materials

Influence of Hydrogen Concentration and Crack Geometry on the Residual Lifetime of Pipeline Steels

Ivanna Soviak1,2

1. Karpenko Physico-Mechanical Institute of NAS of Ukraine
2. Lviv State University of Life Safety, Ukraine

https://doi.org/10.15407/msse2025.01.233

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Keywords

hydrogen embrittlement, pipeline steels, fatigue crack growth, finite element modelling, residual lifetime

Abstract

The paper presents a finite element model for estimating the residual durability of pipe steels in the hydrogen environment. The model takes into account hydrogen diffusion, defect geometry, and loading conditions. The results show that both hydrogen concentration and internal pressure significantly reduce the fatigue crack growth resistance, providing useful data for the diagnosis and design of safe hydrogen transport systems.

References

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