The influence of lattice hydrogen content on the hydrogen-assisted cracking of high strength steel

Lucas, Kristi; Robinson, Michael J.

doi:10.1016/0010-938x(86)90034-x

Cited by 14 publications

(4 citation statements)

References 10 publications

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“…The difference in tensile properties between ferrite and austenite, as well as the difference in hydrogen diffusion characteristics in the two phases, could complicate the process of HE of the weld [45][46][47]. In this section, the HE susceptibility of TIG welds is evaluated by an SSRT test [48][49][50]. The fracture morphology of tensile specimens was analyzed using SEM, and the effect of welding heat input parameters on the HE of the welds was analyzed.…”

Section: Influence Of Heat Input On He Of Weldsmentioning

confidence: 99%

Effect of Heat Input on Hydrogen Embrittlement of TIG Welded 304 Austenitic Stainless Steel

Xue

Zhou

et al. 2022

Metals

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Welds made with 304 austenitic stainless steel play an important role in high-pressure hydrogen storage systems. However, there are few investigations of the effect of heat input on the hydrogen embrittlement (HE) of tungsten inert gas (TIG) welded 304 austenitic stainless steel. In this study, the effect of heat input on the HE of TIG welded 304 austenitic stainless steel is investigated. It was found that with the increase in TIG welding heat input, the ferrite content in the weld shows a tendency to first increase and then decrease. From the perspective of morphology, it first changes from lathy ferrite and strip ferrite to dendritic ferrite, and then becomes reticular ferrite and lathy ferrite. Slow strain rate tensile (SSRT) testing shows that with the increase in heat input from TIG welding, the susceptibility of the weld to HE first increases and then decreases. Our study shows that TIG welds of 304 austenitic stainless steel exhibit the best HE resistance when the welding heat input is 0.778 kJ/mm, the relative elongation (RE) is 0.884, and the relative reduction of area (RRA) is 0.721. This work can provide a reference for the optimization of the 304 stainless steel TIG welding process.

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Section: Influence Of Heat Input On He Of Weldsmentioning

confidence: 99%

Effect of Heat Input on Hydrogen Embrittlement of TIG Welded 304 Austenitic Stainless Steel

Xue

Zhou

et al. 2022

Metals

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“…The COR values for the materials herein, Table 2, were in the lower range of what is reported in the literature for hydrogen permeation experiments on LAS with various microstructures in 3.5 wt% NaCl and electrolytes simulating seawater when polarized to potentials around -1.05 and -2 VAg/AgCl. 56,[59][60][61][62][63][64] According to Equation (4), COR is given by Jss L divided by Deff. The Jss L values herein, Table 2, were similar to those found by most of the researchers on other LAS in similar charging conditions -calculated from the available results according to Equation (4) -while the Deff values herein were about an order of magnitude larger than typically reported in the same papers.…”

Section: Hydrogen Permeationmentioning

confidence: 99%

Effect of Nickel on the Hydrogen Stress Cracking Resistance of Ferritic/Pearlitic Low Alloy Steels

et al. 2018

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Nickel additions to low alloy steels improve mechanical and technological properties. However, part 2 of the ISO 15156 Standard limits the nickel content to a maximum of 1 wt% in oil and gas environments containing H2S due to controversial concerns regarding sulfide stress cracking. The objective of this work was to investigate the effect of nickel in solid solution in the ferrite phase on hydrogen stress cracking resistance. Ferritic/pearlitic research-grade low alloy steels with nominal nickel contents of 0, 1, 2 and 3 wt% were tested by the slow strain rate test method with cathodic hydrogen charging to-1.05 and-2 VAg/AgCl. No difference in fracture mode or morphology was found between the alloys. However, the plastic elongation ratios and reduction in area ratios decreased with increasing nickel content when tested at-2 VAg/AgCl. The direct and indirect effects of nickel, such as the influence of an increasing fraction of pearlite with increasing nickel content, are discussed.

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“…8,12,13 In these solutions, it is believed that the formation of a calcareous deposit on the steel surface reduces the effective metallic surface area available for hydrogen adsorption with a consequent decline in the permeation current. 8,12 However, in solutions containing highly soluble salts (e.g., NaOH or NaCl), the chemical deposition of a barrier deposit on the membrane surface does not occur; therefore, it was observed that the permeation current increases asymptotically to a steady-state value. 4,5 The increase in Ca-rich deposit coverage during hydrogen charging may be due to the increased hydroxyl ion concentrations at the membraneelectrolyte interface as a result of the cathodic reactions.…”

Section: Hydrogen Permeation Measurementsmentioning

confidence: 99%

Hydrogen Permeation Through Cathodically Protected Iron Membranes in Simulated Concrete Environment

El-Sherik

Shirkhanzadeh

1992

CORROSION

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Hydrogen permeation through cathodically protected iron membranes in simulated cement pore solution (SPS) with 3.5% NaCl addition was measured using the electrochemical permeation technique. Hydrogen permeation through mortarcovered membranes was also measured in 3.5% NaCl solution using the same technique. The effects of applied cathodic current density, hydrogen charging time, and mortar cover thickness on the hydrogen permeation rate were investigated. Scanning electron microscopy and energy dispersive x-ray spectroscopy analysis were used to examine the membrane surface for solid deposit formation. The results showed that increasing the applied cathodic current density resulted in an increase in the hydrogen permeation current. The permeation current showed a descending trend with time as a result of the formation of calcium-rich deposits on the cathodic surface of the membrane. Surface coverage by the calcium deposits increased markedly after three weeks of hydrogen charging.

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The influence of lattice hydrogen content on the hydrogen-assisted cracking of high strength steel

Cited by 14 publications

References 10 publications

Effect of Heat Input on Hydrogen Embrittlement of TIG Welded 304 Austenitic Stainless Steel

Effect of Heat Input on Hydrogen Embrittlement of TIG Welded 304 Austenitic Stainless Steel

Effect of Nickel on the Hydrogen Stress Cracking Resistance of Ferritic/Pearlitic Low Alloy Steels

Hydrogen Permeation Through Cathodically Protected Iron Membranes in Simulated Concrete Environment

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