Fracture mechanical behaviour of the steel 15 MnNi 6 3 in argon and in high pressure hydrogen gas with admixtures of oxygen

Kußmaul, K.; Deimel, P.; Fischer, H.; Sattler, Erich

doi:10.1016/s0360-3199(97)00104-3

Cited by 26 publications

(12 citation statements)

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“…For other impurities such as carbon monoxide and nitrous oxide, inhibitory effects on the hydrogen‐enhanced fatigue crack growth in pipeline steels were reported . Similar to the fatigue crack propagation, inhibitory effect of oxygen occurs in fracture toughness tests in hydrogen gas, and it was demonstrated that 10‐vppm oxygen has the inhibitory effect. However, the detailed mechanism was not discussed.…”

Section: Introductionmentioning

confidence: 93%

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Inhibitory effect of oxygen on hydrogen‐induced fracture of A333 pipe steel

Komoda

Kubota

Staykov

et al. 2019

Fatigue Fract Eng Mat Struct

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The effect of oxygen contained in hydrogen gas environment as an impurity on hydrogen environment embrittlement (HEE) of A333 pipe steel was studied through the fracture toughness tests in hydrogen gases. The oxygen contents in the hydrogen gases were 100, 10, and 0.1 vppm. A significant reduction in the J‐Δa curve was observed in the hydrogen with 0.1‐vppm oxygen. Under given loading conditions, the embrittling effect of hydrogen was completely inhibited by 100 vppm of oxygen. In the case of the hydrogen with 10‐vppm oxygen, initially the embrittling effect of hydrogen was fully inhibited, and then subsequently appeared. It was confirmed that 1‐vppm oxygen reduced the embrittling effect of hydrogen. The results can be explained by the predictive model of HEE proposed by Somerday et al.

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Section: Introductionmentioning

confidence: 93%

“…Table shows the result of a literature survey regarding the purity of hydrogen gas used for experiments . As described above, oxygen and other specific gas impurities contained in hydrogen gas environment have inhibitory effects on hydrogen‐induced degradation of material strength.…”

Section: Introductionmentioning

confidence: 99%

Inhibitory effect of oxygen on hydrogen‐induced fracture of A333 pipe steel

Komoda

Kubota

Staykov

et al. 2019

Fatigue Fract Eng Mat Struct

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“…We expect that this work will prompt an accelerated search for effective gas additives [32,33] or coatings [34,35] to inhibit the hydrogen-induced embrittlement in these materials, and will also stimulate new experimental attempts to measure the vibrational frequencies with high resolution, by performing state-of-the-art EELS experiments, or non-linear surfacespectroscopic laser experiments at wavenumbers of around 1000 cm −1 and below [36,37].…”

Section: Introductionmentioning

confidence: 99%

Surface atomic relaxation and magnetism on hydrogen-adsorbed Fe(110) surfaces from first principles

Chohan

Jimenez-Melero

Koehler

2016

Applied Surface Science

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We have computed adsorption energies, vibrational frequencies, surface relaxation and buckling for hydrogen adsorbed on a body-centred-cubic Fe(110) surface as a function of the degree of H coverage. This adsorption system is important in a variety of technological processes such as the hydrogen embrittlement in ferritic steels, which motivated this work, and the Haber-Bosch process. We employed spin-polarised density functional theory to optimise geometries of a six-layer Fe slab, followed by frozen mode finite displacement phonon calculations to compute Fe-H vibrational frequencies. We have found that the quasi-threefold (3f) site is the most stable adsorption site, with adsorption energies of ∼3.0 eV/H for all coverages studied. The long-bridge (lb) site, which is close in energy to the 3f site, is actually a transition state leading to the stable 3f site. The calculated harmonic vibrational frequencies collectively span from 730 to 1220 cm −1 , for a range of coverages. The increased first-to-second layer spacing in the presence of adsorbed hydrogen, and the pronounced buckling observed in the Fe surface layer, may facilitate the diffusion of hydrogen atoms into the bulk, and therefore impact the early stages of hydrogen embrittlement in steels.

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“…[104]) and there is reason to believe that even small concentrations of oxygen could lead to hydrogen-impeding oxide films on steel, as was discussed in section 4.3.1. JIntegral tests performed on a low alloy steel in gaseous hydrogen at pressure of 9 MPa and with additions of 10 and 150 vppm oxygen resulted in corresponding increases of the R-curve [105].…”

Section: K Jh Measurementsmentioning

confidence: 94%

Measurement and interpretation of threshold stress intensity factors for steels in high-pressure hydrogen gas.

Dadfarnia

Nibur²,

Marchi³

et al. 2010

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Threshold stress intensity factors were measured in high-pressure hydrogen gas for a variety of low alloy ferritic steels using both constant crack opening displacement and rising crack opening displacement procedures. The sustained load cracking procedures are generally consistent with those in ASME Article KD-10 of Section VIII Division 3 of the Boiler and Pressure Vessel Code, which was recently published to guide design of high-pressure hydrogen vessels. Three definitions of threshold were established for the two test methods: K THi * is the maximum applied stress intensity factor for which no crack extension was observed under constant displacement; 3 K THa is the stress intensity factor at the arrest position for a crack that extended under constant displacement; and K JH is the stress intensity factor at the onset of crack extension under rising displacement. The apparent crack initiation threshold under constant displacement, K THi *, and the crack arrest threshold, K THa , were both found to be non-conservative due to the hydrogen exposure and crack-tip deformation histories associated with typical procedures for sustainedload cracking tests under constant displacement. In contrast, K JH , which is measured under concurrent rising displacement and hydrogen gas exposure, provides a more conservative hydrogen-assisted fracture threshold that is relevant to structural components in which subcritical crack extension is driven by internal hydrogen gas pressure.4 ACKNOWLEDGMENTS

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Fracture mechanical behaviour of the steel 15 MnNi 6 3 in argon and in high pressure hydrogen gas with admixtures of oxygen

Cited by 26 publications

References 0 publications

Inhibitory effect of oxygen on hydrogen‐induced fracture of A333 pipe steel

Inhibitory effect of oxygen on hydrogen‐induced fracture of A333 pipe steel

Surface atomic relaxation and magnetism on hydrogen-adsorbed Fe(110) surfaces from first principles

Measurement and interpretation of threshold stress intensity factors for steels in high-pressure hydrogen gas.

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