from the conferences organized by TANGER Ltd.
The European Union is committed to replacing natural gas with hydrogen by 2050 as part of its search for clean and sustainable energy sources. Given these goals, it is crucial to examine the materials used in current gas infrastructure and assess their susceptibility to hydrogen embrittlement, a common form of material degradation induced by hydrogen. In this article, a comparative evaluation of fracture toughness was assessed on CT specimen from operated X-60 steel used in Czech gas distribution infrastructure. J-R curves in air and in-situ 10 MPa hydrogen gas were constructed and initiation value J0.2 was determined, followed by SEM fractographic analysis of fracture surfaces. The results showed significant decrease in initiation value J0.2 in high-pressure hydrogen, which was accompanied by fracture morphology change in stable growth region from ductile dimple with micro void coalescence to quasi-cleavage/cleavage.
Keywords: Fracture toughness, J-R curve, high-pressure hydrogen, X-60 steel© This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.