Hydrogen diffusion and trapping in a steel containing porosities

Yaktiti, A.; Dréano, Alixe; Carton, J.-F.; Christien, Frédéric

doi:10.1016/j.corsci.2022.110208

Cited by 12 publications

(4 citation statements)

References 36 publications

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“…Over time, the internal pressure kept rising as atomic hydrogen continued to diffuse until reaching equilibrium in the steel lattice. This pressure can reach hundreds of MPa, producing an increased internal stress field [48]. Finally, the combination of increased hydrogen pressure and mechanical stress led to rupture, creating cavities, voids, or gaps.…”

Section: Resultsmentioning

confidence: 99%

Investigation of Hydrogen Embrittlement Effect on Microstructure Mechanical Properties and Fracture of Low-Carbon Steels

Mamassi,

Ioannidou,

Deligiannis

et al. 2024

MSF

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Steel hydrogen embrittlement (HE), a complex and multifaceted issue, can lead to sudden and catastrophic failure, without significant plastic deformation, making it a critical concern in the industrial sector. The present investigation focuses on the evaluation of HE effects regarding microstructure, mechanical properties degradation and type of fracture of AISI 1010 low-carbon steel, after accelerated hydrogen cathodic charging. Hydrogen was diffused electrolytically in 0.2 Μ H2SO4 solution, containing 3g/L of NH4SCN, using a cathodic current density of 10 and 20 mA/cm2, for 6 and 18 h. Mechanical properties were investigated through slow-rate tensile tests, as well as Charpy V-notch (CVN) impact tests, to determine the value of fracture toughness, both in uncharged and electrochemically pre-charged specimens. Vickers microhardness tests were conducted on the cross-sections of the hydrogen charged samples to evaluate embrittlement susceptibility, due to the presence of dissolved hydrogen. The microstructure modification was carried out through light optical (LOM) and scanning electron microscopy (SEM), in conjunction with an energy-dispersive X-ray detector (EDS). Slow scan X-ray diffraction (SSXRD) was also conducted for crystal structure analysis. The microstructure analysis showed the presence of large amounts of secondary cracks and cavities into the steel matrix, due to hydrogen diffusion and its accumulation at various sites. Hydrogen charging caused a significant gradual elongation decrease of the parent material, from 25% to 6.73%, in case of embrittlement at 20 mA/cm2 for 18h. Accordingly, after 18 h of exposure, the impact energy decrement was determined at 31.5%, at a current density of 10 mA/cm2, whereas the corresponding reduction at 20 mA/cm2 reached 68%.

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Section: Resultsmentioning

confidence: 99%

Investigation of Hydrogen Embrittlement Effect on Microstructure Mechanical Properties and Fracture of Low-Carbon Steels

Mamassi,

Ioannidou,

Deligiannis

et al. 2024

MSF

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“…Szost et al [57] defined microvoids as hydrogen traps in a martensitic steel. Also Yaktiti et al [58] showed that a large majority of hydrogen was trapped reversibly nearby voids in cast iron.…”

Section: L-pbf Ti-6al-4v Interaction With Hydrogenmentioning

confidence: 99%

“…Furthermore, vertically built specimens contained a slightly higher quantity of porosities compared to the horizontal building orientation. Yaktiti et al [58] investigated the hydrogen-porosity interaction in cast steel at room temperature and stated that 90% of the hydrogen present was located in the voids. Therefore, as elaborated in the previous sections, it was hypothesised that hydrogen was attracted to porosities [66].…”

Section: Effect Of Building Orientation On Hydrogen Interactionmentioning

confidence: 99%

The mechanism behind the effect of building orientation and surface roughness on hydrogen embrittlement of laser powder bed fused Ti-6Al-4V

Deconinck

Quejido

Vidaller

et al. 2023

Additive Manufacturing

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“…Similar to precipitates, micropores and nano-vacancies can be strong H traps with a binding energy of 40–70 kJ/mol. ,− However, it has been shown that a high concentration of vacancy is necessary to have a remarkable effect on H diffusion . To control H content under a critical value, both trapping and permeation energies of H in the constituent phases should be accounted for …”

Section: Knowledge Base About Hementioning

confidence: 99%

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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Hydrogen diffusion and trapping in a steel containing porosities

Cited by 12 publications

References 36 publications

Investigation of Hydrogen Embrittlement Effect on Microstructure Mechanical Properties and Fracture of Low-Carbon Steels

Investigation of Hydrogen Embrittlement Effect on Microstructure Mechanical Properties and Fracture of Low-Carbon Steels

The mechanism behind the effect of building orientation and surface roughness on hydrogen embrittlement of laser powder bed fused Ti-6Al-4V

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

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