Stress concentration affecting hydrogen-assisted crack in API X70 pipeline base and weld steel under hydrogen/natural gas mixture

Nguyen, Thanh Tuan; Heo, Hyeong Min; Park, Jaeyeong; Nahm, Seung Hoon; Beak, Un Bong

doi:10.1016/j.engfailanal.2021.105242

Cited by 15 publications

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“…Different notch radius or configurations can be tested to evaluate the influence of triaxiality; there is consensus that high K t values result in an increase in H concentration near the notch tip and therefore in a higher susceptibility to HE. 807 The notched geometries from ASTM G142 have also been used to assess fatigue properties in gaseous H 2 environments. 809 Reduction of notched tensile strength (RNTS) or relative reduction of area (RRA) is also considered as criteria for materials qualification according to the ANSI/CSA CHMC 1-2014 Standard (Test methods for evaluating material compatibility in compressed H applications -Metals).…”

Section: Chemical Reviewsmentioning

confidence: 99%

“…As shown in Figure , the notch considered in ATM G142 has a 60° V-shape with a notch tip radius of 0.083 mm, producing stress concentration factor K t around 5.6 to 6.6, , which reveals an embrittlement susceptibility that is not observed in smooth samples. Different notch radius or configurations can be tested to evaluate the influence of triaxiality; there is consensus that high K t values result in an increase in H concentration near the notch tip and therefore in a higher susceptibility to HE . The notched geometries from ASTM G142 have also been used to assess fatigue properties in gaseous H 2 environments .…”

Section: Knowledge Base About Hementioning

confidence: 99%

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Hydrogen Embrittlement as a Conspicuous Material Challenge─Comprehensive Review and Future Directions

Yu,

Díaz,

et al. 2024

Chem. Rev.

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Hydrogen is considered a clean and efficient energy carrier crucial for shaping the net-zero future. Large-scale production, transportation, storage, and use of green hydrogen are expected to be undertaken in the coming decades. As the smallest element in the universe, however, hydrogen can adsorb on, diffuse into, and interact with many metallic materials, degrading their mechanical properties. This multifaceted phenomenon is generically categorized as hydrogen embrittlement (HE). HE is one of the most complex material problems that arises as an outcome of the intricate interplay across specific spatial and temporal scales between the mechanical driving force and the material resistance fingerprinted by the microstructures and subsequently weakened by the presence of hydrogen. Based on recent developments in the field as well as our collective understanding, this Review is devoted to treating HE as a whole and providing a constructive and systematic discussion on hydrogen entry, diffusion, trapping, hydrogen–microstructure interaction mechanisms, and consequences of HE in steels, nickel alloys, and aluminum alloys used for energy transport and storage. HE in emerging material systems, such as high entropy alloys and additively manufactured materials, is also discussed. Priority has been particularly given to these less understood aspects. Combining perspectives of materials chemistry, materials science, mechanics, and artificial intelligence, this Review aspires to present a comprehensive and impartial viewpoint on the existing knowledge and conclude with our forecasts of various paths forward meant to fuel the exploration of future research regarding hydrogen-induced material challenges.

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Section: Chemical Reviewsmentioning

confidence: 99%