June 22, 2025

Influence of Hydrogen on Overload-Affected Fatigue Crack Growth in Pipeline Steels

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Hydrogen significantly accelerates fatigue crack growth in pipeline steels under overload conditions, raising safety concerns.
In the examined scenarios, hydrogen-induced crack acceleration was particularly noted when overload occurred in air before exposure to hydrogen.
The assessment utilized vintage Norwegian X65 pipeline steel, focusing on crack growth under variable conditions of loading and environment.
Understanding hydrogen's effect on fatigue behavior is crucial for ensuring the integrity of pipelines repurposed for hydrogen transport.

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This study shows hydrogen accelerates crack growth in pipeline steels under overload conditions, indicating material integrity concerns.

Giannini et al. (2025) studied this question.

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