Anti-Corrosion Methods and Materials· 2026Q2
Research on the effect of hydrogen on the low-cycle fatigue property of the heat-affected zone of the X80 welded pipe
- 0citations
- Q2SCImago
- 2026year
Short summary
Hydrogen exposure reduces the low-cycle fatigue life of X80 welded pipe heat-affected zones (HAZ), with coarse-grain HAZ experiencing a 78% decrease in fatigue life, while fine-grain HAZ shows a 43% decrease.
AI-generated from the title and abstract; the full text is not read.
Key points
- Hydrogen exposure significantly reduces the low-cycle fatigue life of X80 welded pipe HAZ.
- Coarse-grain HAZ fatigue life decreased by an average of 78% due to hydrogen.
- Fine-grain HAZ fatigue life decreased by an average of 43% due to hydrogen.
- Microscopic mechanisms of hydrogen-induced fatigue damage were elucidated.
AI-generated from the title and abstract; the full text is not read.
Abstract
Purpose This research aims to investigate the fatigue fracture mechanism of the heat-affected zone (HAZ) of the X80 welded pipes after being affected by hydrogen, thereby enhancing the safety of hydrogen transportation pipelines. Design/methodology/approach This study used thermal simulation, electrochemical hydrogen charging and low-cycle fatigue testing, combined with microstructural analysis, to systematically investigate the low-cycle fatigue behavior of various subzones in the HAZ of X80 welded pipe. Findings The results show that hydrogen significantly reduces the fatigue life of the HAZ. The coarse-grain HAZ suffers the most severe damage, with the average fatigue life decreasing by 78%, while the fine-grain HAZ has the strongest resistance to hydrogen damage, with the average fatigue life decreasing by 43%. Originality/value In this work, the microscopic mechanisms of hydrogen-induced fatigue damage were elucidated from perspectives including microstructural evolution, grain boundary characteristic changes and dislocation behavior. The research results will provide theoretical guidance for the design of hydrogen resistance in the HAZ of welded pipelines for hydrogen transport.
The authors' abstract, as published at the source. Anti-Corrosion Methods and Materials, 2026 · DOI ↗
Continue with a free account
Ask the paper: 3 free questions a day about this paper; save it, get its citation, new summaries every day for your field. Takeaways are Premium.
Continue free on the webSign in with Google or Apple; no card needed. You come back to this paper.
On your phone:
Field: Metals and Alloys
Metals and AlloysMaterials Science