Examination of hydrogen interaction in carbon steel by means of quantitative microstructural and fracture descriptions

Sozańska, M.; Sojka, Jaroslav; Bet̆áková, Petra; Dagbert, C.; Hyspecká, L.; Galland, J.; Tvrdy, M.

doi:10.1016/s1044-5803(01)00130-9

Cited by 13 publications

(8 citation statements)

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“…However, it should be taken into account that the irreversibly trapped hydrogen cannot be safe. Under certain conditions (application of high stress [23], cyclic loading [24]) the hydrogen accumulated in the steel may redissolve and cause its degradation. Therefore, it should be checked whether so significant metal degradation has been associated only with the application of the present testing method or if it may also occur under the service conditions of constructions immersed in sea water in the presence of SRB.…”

Section: Discussionmentioning

confidence: 99%

Effect of cathodic polarization and sulfate reducing bacteria on mechanical properties of different steels in synthetic sea water

Domżalicki

Łunarska²,

Birn

2007

Materials & Corrosion

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At the slow strain rate tensile tests done using the specially designed facility, the decrease in the elongation to fracture, reduction of area, fracture energy and no effect on the strength have been stated for the low alloy ferrite-pearlite and sorbite steels, polarized in synthetic sea water at potentials corresponding to the cathodic protection (À 800 to À 1400 mV SCE ). Presence of SRB promotes the plasticity loss, being especially pronounced at potentials À 1100 to À 1200 mV SCE . At higher cathodic polarization, the plasticity estimated in inoculated and in sterile water equalizes. The effects have been correlated with the contents of absorbed and of permeable hydrogen. The promotion of hydrogen charging and the plasticity loss by SRB at the low and medium applied cathodic polarization has been accounted for the observed production of S À2 ions and inhibition of deposit formation. The negligible effect of SRB at the high cathodic polarization has been suggested to be a result of the suppression the SRB growth due to the high alkalization of the near surface solution. The same amount of hydrogen produces the less detrimental effect on the sorbite than on the ferrite-pearlite steel. However, at the similar cathodic polarization, the sorbite steel absorbs the highest amount of hydrogen and reveals the most pronounced degradation. Cathodic protection of constructions subjected to the action of SRB in the sea water should provide the conditions, under which no fragment of marine construction could be polarized by potential corresponding to the maximum degradation of the plastic properties of steels (À 1100 to À 1200 mV SCE ).

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Section: Discussionmentioning

confidence: 99%

Effect of cathodic polarization and sulfate reducing bacteria on mechanical properties of different steels in synthetic sea water

Domżalicki

Łunarska²,

Birn

2007

Materials & Corrosion

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“…The role of hydrogen accumulation in steel matrix and/or at precipitate/matrix interfaces on the formation of cracks has also been widely discussed in the literature, e.g. [32][33][34]. However, due to the great complexity in materials characteristics, testing, and environmental conditions, it is necessary to investigate each failure caused by hydrogen individually.…”

Section: Introductionmentioning

confidence: 99%

Hydrogen pre-charging effects on the notch tensile properties and fracture behaviour of heat-affected zones of thermally aged welds between T24 and T92 creep-resistant steels

Falat¹,

Čiripová²,

Homolová³

et al. 2016

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The effects of thermal exposure at 600• C and subsequent electrolytic hydrogen charging at ambient temperature were studied in terms of their influence on notch-tensile properties and fracture behaviour of individual heat-affected zones (HAZ) of Ni-based transition weldments between T24 and T92 creep-resistant steels. The experimental welded joints were prepared by gas tungsten arc welding using "Inconel-type" filler metal Nirod 600. Post-weld heat treatment (PWHT) was carried out at 720• C for 2 h, followed by passive cooling within tempering furnace. Subsequent long-term ageing of two series of prepared T24/T92 dissimilar welds at 600• C for 1000 and 5000 h, respectively, led to gradual changes in both T24 and T92 HAZ microstructures, which were mainly related to their additional tempering accompanied by the coarsening of original precipitates as well as newly-formed secondary phases. The observed thermally-induced microstructural changes together with subsequently applied hydrogen charging effects resulted in complex variations in tensile properties and fracture behaviour of individual HAZ regions related to the pre-existing differences in their initial tempering grade due to the used PWHT procedure. K e y w o r d s : creep-resistant steels, dissimilar welding, isothermal ageing, hydrogen embrittlement, mechanical properties, fracture mechanisms

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“…An important complement to mechanical tests is a quantitative fractography. Analysis of mechanical properties results combined with quantitative fractography allows to obtain some new information about material failure during destruction processes [8][9][10][11]. A variety of different experimental techniques have been developed in the past to study fracture surfaces [12].…”

Section: Introductionmentioning

confidence: 99%

“…In practice, depending on the morphology of the fracture and the possibility of testing were used for both approaches. The authors of this publication have used both techniques -quantitative description of the fracture surface [10,11] or a profile fracture (linear roughness index R L , fractal dimension D F and overlap index O L ) [8,9].…”

Section: Introductionmentioning

confidence: 99%

Investigation of Stress Corrosion Cracking in Magnesium Alloys by Quantitative Fractography Methods

Sozańska

Mościcki

Chmiela

2017

Archives of Metallurgy and Materials

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The article shows that the use of quantitative fracture description may lead to significant progress in research on the phenomenon of stress corrosion cracking of the WE43 magnesium alloy. Tests were carried out on samples in air, and after hydrogenation in 0.1 M Na 2 SO 4 with cathodic polarization. Fracture surfaces were analyzed after different variants of the Slow Strain Rate Test. It was demonstrated that the parameters for quantitative evaluation of fracture surface microcracks can be closely linked with the susceptibility of the WE43 magnesium alloy operating under complex state of the mechanical load in corrosive environments. The final result of the study was the determination of the quantitative relationship between Slow Strain Rate Test parameters, the mechanical properties, and the parameters of the quantitative evaluation of fracture surface (microcracks).

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Examination of hydrogen interaction in carbon steel by means of quantitative microstructural and fracture descriptions

Cited by 13 publications

References 0 publications

Effect of cathodic polarization and sulfate reducing bacteria on mechanical properties of different steels in synthetic sea water

Effect of cathodic polarization and sulfate reducing bacteria on mechanical properties of different steels in synthetic sea water

Hydrogen pre-charging effects on the notch tensile properties and fracture behaviour of heat-affected zones of thermally aged welds between T24 and T92 creep-resistant steels

Investigation of Stress Corrosion Cracking in Magnesium Alloys by Quantitative Fractography Methods

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