| Download | - View final version: Fracture toughness assessment of pipeline steels under hydrogen exposure for blended gas applications (PDF, 7.2 MiB)
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| DOI | Resolve DOI: https://doi.org/10.3390/met15010029 |
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| Author | Search for: Ghadiani, HesamedinORCID identifier: https://orcid.org/0009-0006-1078-4357; Search for: Farhat, ZoheirORCID identifier: https://orcid.org/0000-0002-9207-4482; Search for: Alam, Tahrim; Search for: Islam, Md. Aminul1ORCID identifier: https://orcid.org/0000-0003-0802-8828 |
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| Affiliation | - National Research Council of Canada. Clean Energy Innovation
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| Format | Text, Article |
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| Subject | natural gas–hydrogen blending; hydrogen embrittlement; fracture toughness; critical stress intensity factor; API X52 and X65 degradation |
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| Abstract | Hydrogen embrittlement (HE) is a critical concern for pipeline steels, particularly as the energy sector explores the feasibility of blending hydrogen with natural gas to reduce carbon emissions. Various mechanical testing methods assess HE, with fracture toughness testing offering a quantitative measure of defect impacts on structural safety, particularly for cracks arising during manufacturing, fabrication, or in-service conditions. This study focuses on assessing the fracture toughness of two pipeline steels from an existing natural gas network under varying hydrogen concentrations using double cantilever beam (DCB) fracture tests. A vintage API X52 steel with a ferritic–pearlitic microstructure and a modern API X65 steel with polygonal ferrite and elongated pearlite colonies were selected to represent old and new pipeline materials. Electrochemical hydrogen charging was employed to simulate hydrogen exposure, with the charging parameters derived from hydrogen permeation tests. The results highlight the differing impacts of hydrogen on the fracture toughness and crack growth in vintage and modern pipeline steels. These findings are essential for ensuring the safety and integrity of pipelines carrying hydrogen–natural gas blends. |
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| Publication date | 2025-01-01 |
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| Publisher | MDPI |
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| Licence | |
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| In | |
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| Language | English |
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| Peer reviewed | Yes |
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| Export citation | Export as RIS |
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| Report a correction | Report a correction (opens in a new tab) |
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| Record identifier | 2e466304-9692-406b-954d-a9bd78e8d661 |
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| Record created | 2025-06-03 |
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| Record modified | 2025-06-03 |
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