Role of microstructure on electrochemical hydrogen permeation properties in advanced high strength steels

Zhou, Pengwei; Li, Wei; Zhao, Hongshan; Jin, Xianglin

doi:10.1016/j.ijhydene.2018.04.241

Cited by 55 publications

(19 citation statements)

References 42 publications

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“…It can be associated with more complex microstructure of the AHSSs. Trapping between grains of different phases can play a very significant role as it was demonstrated for ferrite/martensite, martensite/austenite and ferrite/austenite interfaces . It is also possible that CP1000 and DP1000 contain more precipitates working as reversible trapping sites.…”

Section: Discussionmentioning

confidence: 96%

“…Hydrogen trapping by retained austenite present in most AHSSs was documented in the work of Sojka et al, who observed that diffusion coefficient decreased with the content of retained austenite in transformation‐induced plasticity steels. Zhou et al showed that trapping binding energy of retained austenite grains changed as a function of the morphology from strong reversible to irreversible.…”

Section: Introductionmentioning

confidence: 99%

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The effect of microstructure on hydrogen permeability of high strength steels

Rudomilova

Prošek

Salvetr

et al. 2019

Materials & Corrosion

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Hydrogen diffusivity and trapping have been studied in two advanced high strength steel grades and model samples using electrochemical permeation test. Microstructures of CP1000 and DP1000 steels consist of ferrite, martensite and a small fraction of retained austenite. In addition, bainite is present in CP1000. Model phases with predominance of a particular phase have been prepared by specific heat treatment. DP1000 has shown the lowest diffusivity among all materials, while ferritic model sample has shown the highest. Differences in hydrogen diffusion coefficient values are linked to trapping microstructural characteristics and grain size. K E Y W O R D Shydrogen-induced cracking, hydrogen permeability, steel

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Section: Discussionmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

The effect of microstructure on hydrogen permeability of high strength steels

Rudomilova

Prošek

Salvetr

et al. 2019

Materials & Corrosion

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Section: Successive Build-up Permeation Transientsmentioning

confidence: 99%

“…This is known as the lattice diffusion coefficient of the steel, DL. Some authors have successfully applied this methodology to characterize hydrogen diffusivity in CrMo steels [33,[38][39][40]. The cathodic current density was increased in steps of 0.5 mA/cm 2 for the first two transients, and of 1 mA/cm 2 for the following ones (see Figure 2a).…”

Section: Successive Build-up Permeation Transientsmentioning

confidence: 99%

Hydrogen Diffusivity in Different Microstructures of 42CrMo4 Steel

Imdad¹,

Zafra²,

Arniella³

et al. 2021

Hydrogen

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It is well known that the presence of hydrogen decreases the mechanical properties of ferritic steels, giving rise to the phenomenon known as hydrogen embrittlement (HE). The sensitivity to HE increases with the strength of the steel due to the increase of its microstructural defects (hydrogen traps), which eventually increase hydrogen solubility and decrease hydrogen diffusivity in the steel. The aim of this work is to study hydrogen diffusivity in a 42CrMo4 steel submitted to different heat treatments—annealing, normalizing and quench and tempering—to obtain different microstructures, with a broad range of hardness levels. Electrochemical hydrogen permeation tests were performed in a modified Devanathan and Stachursky double-cell. The build-up transient methodology allowed the determination of the apparent hydrogen diffusion coefficient, Dapp, and assessment of its evolution during the progressive filling of the microstructural hydrogen traps. Consequently, the lattice hydrogen diffusion coefficient, DL, was determined. Optical and scanning electron microscopy (SEM) were employed to examine the steel microstructures in order to understand their interaction with hydrogen atoms. In general, the results show that the permeation parameters are strongly related to the steel hardness, being less affected by the type of microstructure.

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“…14 The diffusion of hydrogen through steel is influenced by its microstructure. 15 Hydrogen molecules are too large and may not diffuse into a metal lattice. 16 The decomposition of the hydrocarbon chains is intensified by nascent steel surface, which results from a boundary friction.…”

Section: Introductionmentioning

confidence: 99%

In-situ-determination of tribologically induced hydrogen permeation using electrochemical methods

Oberle

Amann

Kürten

et al. 2019

Proceedings of the Institution of Mechanical Engineers, Part J:

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White etching cracks are one of the possible causes of bearing damage, which can lead to the failure of wind turbines. The mechanisms of hydrogen diffusion in bearings are not yet fully understood, but it is assumed under tribological loading that the lubricant degradation releases hydrogen which diffuses into the contacting surfaces (i.e. steel). This leads to hydrogen-induced cracking and damage to the bearings. In order to better understand these mechanisms, it is necessary to investigate the influence of tribological loads and lubricant composition on hydrogen release. For this purpose, a test setup was developed for the analysis of tribologically induced hydrogen permeation by means of a ball-on-plate test. The diffused hydrogen was measured with an electrochemical three-electrode setup. The results showed a direct correlation between the amount of hydrogen released and the applied normal load. Furthermore, an increased velocity resulted in enhanced diffusion of hydrogen through metal. In addition, the tribological contact surface was decisive for hydrogen permeation. The higher velocity and the larger contact area result in an activated nascent iron surface which promotes hydrogen penetration. The results show that lubricants can be classified as critical for the formation of hydrogen embrittlement in tribological contacts.

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Role of microstructure on electrochemical hydrogen permeation properties in advanced high strength steels

Cited by 55 publications

References 42 publications

The effect of microstructure on hydrogen permeability of high strength steels

The effect of microstructure on hydrogen permeability of high strength steels

Hydrogen Diffusivity in Different Microstructures of 42CrMo4 Steel

In-situ-determination of tribologically induced hydrogen permeation using electrochemical methods

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