Phenomenon of skin effect in metals due to hydrogen absorption

Polyanskiy, Vladimir A.; Belyaev, Аlexander K.; Alekseeva, Ekaterina; Polyanskiy, A. M.; Tretyakov, D. A.; Yakovlev, Yu. A.

doi:10.1007/s00161-019-00839-2

Cited by 30 publications

(19 citation statements)

References 70 publications

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“…To verify the model, we refer to an experiment reported in [5, 9]. A cylindrical specimen of radius 4 mm and length 40 mm made of the weather-resistant steel 14HGNDC was charged with hydrogen in an electrolyte according to NACE Standard TM0284-2106-SG.…”

Section: Results and Verificationmentioning

confidence: 99%

“…The concentration is determined after 96 h of saturation. According to [5], during the experiment, a constant concentration of 50 ppm of hydrogen corresponding to 2500 mg / l of hydrogen sulfide was maintained on the boundary. Thus, we assume that c = 1 corresponds to c ppm = 50 ppm .…”

Section: Results and Verificationmentioning

confidence: 99%

“…A uniform distribution of hydrogen can be obtained only after 500 h, which is several times larger than the standard average duration of the experiment. Standard hydrogen saturation of specimens in an electrolyte also results in an extremely nonuniform distribution of hydrogen across the specimen [5, 9, 10]. In fact, what is saturated, in both methods, is only a thin layer in the vicinity of the surface.…”

Section: Introductionmentioning

confidence: 99%

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Application of micropolar theory to the description of the skin effect due to hydrogen saturation

Frolova

Vilchevskaya

Bessonov

et al. 2021

Mathematics and Mechanics of Solids

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A model is proposed for the description of a highly inhomogeneous distribution of hydrogen within a saturated metal specimen (the so-called skin effect due to hydrogen saturation). The model is based on the micropolar continuum approach and results in a nonuniform stress–strain state of a cylindrical metal specimen due to distributed couples or microrotations. The dependence of the diffusion coefficient on the strain energy is considered in order to model stress-induced diffusion. Accumulation of hydrogen within a thin boundary layer results in a highly nonuniform distribution of hydrogen across the specimen. The mutual influence of the stress–strain state and hydrogen accumulation is taken into account. The estimated thickness of the surface layer containing hydrogen is comparable to the thickness observed in experiments. The predicted average concentration coincides with experimental data.

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Section: Results and Verificationmentioning

confidence: 99%

Section: Results and Verificationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Application of micropolar theory to the description of the skin effect due to hydrogen saturation

Frolova

Vilchevskaya

Bessonov

et al. 2021

Mathematics and Mechanics of Solids

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“…1). Эти наблюдения коррелируют с данными об ориентационной зависимости механического двойникования и температурной зависимости морфологии двойников, описанными в работах [21,22]. Понижение температуры деформации усиливает вклад этого механизма в формирование микроструктуры, двойни-ковые границы встречаются чаще и их плотность не изменяется от зерна к зерну (Рис.…”

Section: результаты и их обсуждениеunclassified

Effect of electrolytic hydrogen saturation on deformation mechanisms of Fe-17Cr-13Ni-3Mo-0.01C austenitic stainless steel during cold rolling

et al. 2021

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In this work, we investigated the effect of the current density during electrolytic hydrogen-charging before deformation on the mechanisms of plastic deformation of stable austenitic stainless steel Fe-17Cr-13Ni-3Mo-0.01C during rolling. Using transmission electron microscopy and backscattered electron diffraction, it has been shown that plastic deformation by rolling at room temperature with 25 % reduction causes the formation of a high density of crystal lattice defects in the initially coarse-grained steel samples. The main deformation mechanism during rolling is dislocation slip, which is accompanied by mechanical twinning as an additional mechanism contributing the structure fragmentation. Regardless of the mode of preliminary hydrogen-charging, it promotes more active development of twinning. The higher the current density during hydrogen pre-charging, the higher the density of twin boundaries and dislocation density in the steel structure during rolling. After hydrogen-charging at a current density of 200 mA / cm 2 , the γ → ε transformation is also realized upon deformation. At the same time, an increase in the current density upon hydrogen pre-charging from 10 to 200 mA / cm 2 does not contribute to a significant increase in the concentration of hydrogen adsorbed by the material (0.0017 -0.0018 mass.%), which, together with microstructural studies, indicates a different distribution of hydrogen in the samples immediately before deformation and the important role of the hydrogen concentration gradient on the deformation mechanisms of the steel during subsequent rolling. With a decrease in the deformation temperature (due to the cooling of the samples before rolling to the temperature of liquid nitrogen), hydrogen-charging also causes an increase in the linear density of twin boundaries and the formation of ε-martensite, but these effects are more significant compared to room-temperature deformation. The data obtained indicate that at similar values of the concentration of adsorbed hydrogen in the structure of steels, the saturation mode affects the deformation mechanism and phase transformations in austenitic steel.

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“…Critical hydrogen sources are present during materials processing as well as during service [12,13]. Hydrogen can be absorbed at the surface, resulting in an inhomogenous hydrogen distribution [14][15][16][17] in the steels, which is strongly influenced by plastic deformation [18], residual stresses and edge conditions [19][20][21][22]. Hydrogen desorption at room temperature is a crucial problem during testing of hydrogen embrittlement [23], which makes determining the hydrogen embrittlement threshold for a given hydrogen content difficult.…”

Section: Introductionmentioning

confidence: 99%

The role of hydrogen diffusion, trapping and desorption in dual phase steels

et al. 2022

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Hydrogen embrittlement (HE) of advanced high-strength steels is a crucial problem in the automotive industry, which may cause time-delayed failure of car body components. Practical approaches for evaluating the HE risk are often partially and contradictive in nature, because of hydrogen desorption during testing and inhomogenous hydrogen distributions in, e.g., notched samples. Therefore, the present work aims to provide fully parametrized and validated bulk diffusion models for three dual phase steels to simulate long-range chemical diffusion, trapping and hydrogen desorption from the surface. With one constant set of parameters, the models are able to predict the temperature dependency of measured Choo-Lee plots as well as the concentration dependency of measured effective diffusion coefficients. Finally, the parametrized and validated bulk diffusion models are applied for studying the role of the current density on the permeation time and the role of coatings as effective diffusion barriers. Graphical abstract

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Phenomenon of skin effect in metals due to hydrogen absorption

Cited by 30 publications

References 70 publications

Application of micropolar theory to the description of the skin effect due to hydrogen saturation

Application of micropolar theory to the description of the skin effect due to hydrogen saturation

Effect of electrolytic hydrogen saturation on deformation mechanisms of Fe-17Cr-13Ni-3Mo-0.01C austenitic stainless steel during cold rolling

The role of hydrogen diffusion, trapping and desorption in dual phase steels

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