2019
DOI: 10.1016/j.ijhydene.2018.11.031
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Effect of nitrogen-addition on the absorption and diffusivity of hydrogen in a stable austenitic stainless steel

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Cited by 25 publications
(6 citation statements)
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“…This is apparently in conflict with the results of both Lin et al [24] and ours, which reveal that the increase in dislocation density notably influences the hydrogen content of the material. Previous studies on the hydrogen absorption and diffusivity by Macadre et al [38] have shown that the greater dislocation densities contribute to a higher hydrogen content and increase in hydrogen solubility, while the impact of dislocations on the hydrogen diffusivity is negligible. This was attributed to the large difference in energies for lattice diffusion and dislocation trapping, and to the relatively little hydrogen content trapped at dislocations in the FCC steels.…”
Section: Hydrogen Uptake Abilitymentioning
confidence: 87%
“…This is apparently in conflict with the results of both Lin et al [24] and ours, which reveal that the increase in dislocation density notably influences the hydrogen content of the material. Previous studies on the hydrogen absorption and diffusivity by Macadre et al [38] have shown that the greater dislocation densities contribute to a higher hydrogen content and increase in hydrogen solubility, while the impact of dislocations on the hydrogen diffusivity is negligible. This was attributed to the large difference in energies for lattice diffusion and dislocation trapping, and to the relatively little hydrogen content trapped at dislocations in the FCC steels.…”
Section: Hydrogen Uptake Abilitymentioning
confidence: 87%
“…In addition, grain size, characteristics of GBs, and precipitation all influence H trapping and diffusion properties, as detailed in Section . Alloying elements in steel, such as N, B, P, Zr, Cr, Cu, and Mn, typically reduce the effective H diffusivity ( D eff ) and increase H solubility. N at a concentration higher than 0.38 % in an austenitic steel decreases H diffusivity because N can be an effective H trap with a binding energy of about 25 kJ/mol. , B, Zr, and Cr have a similar effect as that of N . B and P segregation to GBs increases the H binding energy to an extent that D eff is reduced .…”
Section: Knowledge Base About Hementioning
confidence: 99%
“…Many authors have reported that compressive stresses slow down hydrogen diffusion, both experimentally and through numerical modelling [45]- [47]. Since residual compressive stresses directly influence the diffusion activation energy, the effect of removing the residual stresses should be measurable with TDS, while the effect of dislocation density on hydrogen diffusivity in ASS has been shown to be limited as diffusion in still rate determining [48], [49]. Compared to CM316L, the remaining dislocation cell structure might still provide fast diffusion paths as Lin et al [27] argued that hydrogen diffusion along sub-grain boundaries increases the overall hydrogen diffusivity at low current densities.…”
Section: Hydrogen/materials Interactionmentioning
confidence: 99%