Investigation of hydrogen transport behavior of various low-alloy steels with high-pressure hydrogen gas

Yamabe, Junichiro; Awane, Tohru; Matsuoka, Saburo

doi:10.1016/j.ijhydene.2015.07.006

Cited by 57 publications

(17 citation statements)

References 32 publications

(34 reference statements)

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“…25,26) Concerning steels samples, dynamic SIMS has been shown to be an effective method for detecting deuterium or hydrogen in different steels. [27][28][29][30][31][32] These results showed that deuterium or hydrogen is enriched in specific microstructures, although this enrichment depends on the species of steel. The dynamic SIMS has also been applied to observe the distribution of light elements such as boron and nitrogen in steels.…”

Section: Micro-portion Image Analysis Of Light Elements In Fe-cr Basementioning

confidence: 94%

Micro-Portion Image Analysis of Light Elements in Fe–Cr Based Alloys by Time-of-Flight Secondary Ion Mass Spectrometry

et al. 2017

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Section: Micro-portion Image Analysis Of Light Elements In Fe-cr Basementioning

confidence: 94%

Micro-Portion Image Analysis of Light Elements in Fe–Cr Based Alloys by Time-of-Flight Secondary Ion Mass Spectrometry

et al. 2017

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“…In general, hydrogen systems have typically been designed using alloys with a high resistance to hydrogen embrittlement, such as austenitic stainless steels and aluminium alloys. However, these metals have a lower strength and are more expensive than conventional structural steels, such as low-alloy steels [3,4]. The best solution to this problem, based on the criteria of economy and performance, would be to use medium-and high-strength tempered martensitic steels, which allow decreasing pipe and vessel thicknesses and hence a lower cost of the steel.…”

Section: Introductionmentioning

confidence: 99%

Effects of hydrogen on the fracture toughness of CrMo and CrMoV steels quenched and tempered at different temperatures

Peral

Zafra

Belzunce

et al. 2019

International Journal of Hydrogen Energy

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Tempering temperatures ranging between 500 and 720ºC were applied in order to analyse the relationship between steel microstructure and the deleterious effect of hydrogen on the fracture toughness of different CrMo and CrMoV steels. The influence of hydrogen on the fracture behaviour of the steel was investigated by means of fracture toughness tests using CT specimens thermally pre-charged with hydrogen gas. First, the specimens were pre-charged with gaseous hydrogen in a pressurized reactor at 19.5MPa and 450ºC for 21h and elasto-plastic fracture toughness tests were performed under different displacement rates. The amount of hydrogen accumulated in the steel was subsequently determined in order to justify the fracture toughness results obtained with the different steel grades. Finally, scanning electron microscopy was employed to study both the resulting steel microstructures and the fracture micromechanisms that took place during the fracture tests. According to the results, hydrogen solubility was seen to decrease with increasing tempering temperature, due to the fact that hydrogen microstructural trapping is lower in relaxed martensitic microstructures, the strong effect of the presence of vanadium carbides also being noted in this same respect. Hydrogen embrittlement was also found to be much greater in the grades tempered at the lowest temperatures (with higher yield strength). Moreover, a change in the fracture micromechanism, from ductile (microvoid coalescence, MVC), in the absence of hydrogen, to intermediate (plasticity-related hydrogen induced cracking, PRHIC) and brittle (intergranular fracture, IG), was appreciated with the increase in the embrittlement indexes.

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“…Typically, hydrogen facilities have been designed using metallic materials with high resistance to hydrogen embrittlement, such as austenitic stainless steel or aluminium alloys. However, such metallic alloys have lower strength and are more expensive than conventional steels, such as carbon and low-alloy steels [1]. Then, the best economical solution to manufacture hydrogen facilities would be the use of medium and high-strength steels in order to reduce the thickness of pipes and vessels and so the material costs.…”

Section: Introductionmentioning

confidence: 99%

Effects of hydrogen on the fracture toughness of 42CrMo4 steel quenched and tempered at different temperatures

Zafra

Peral

Belzunce

et al. 2019

International Journal of Pressure Vessels and Piping

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The aim of this paper is to study the effect of hydrogen on the fracture toughness of 42CrMo4 steel quenched and tempered at 500, 550, 600, 650 and 700ºC. The influence of hydrogen was assessed by means of fracture toughness tests carried out on compact CT specimens, pre-charged with gaseous hydrogen in a pressurized reactor at 19.5MPa and 450ºC for 21h. Thermal desorption analysis (TDA) and finite element simulations (FEM) were employed to study the hydrogen diffusivity and solubility of the different steel grades. Additionally, X-ray diffraction (XRD) was used to determine the dislocation densities present in these steel microstructures and scanning electron microscopy (SEM) to analyse them and to identify the fracture micromechanisms that took place during the fracture toughness tests.According to the obtained results, dislocation density, hydrogen solubility and residual hydrogen strongly trapped in the steel microstructure were seen to decrease with increasing tempering temperature, following the apparent hydrogen diffusion coefficient the opposite trend. It was also observed that hydrogen embrittlement was much greater in the steel grades tempered at the lowest temperatures (with higher yield strength), and in tests performed at the lowest displacement rates. Moreover, a change in the fracture micromechanism was detected, from ductile (microvoids coalescence, MVC) in the absence of hydrogen, to intermediate (plasticity-related hydrogen induced cracking, PRHIC) in the case of the hydrogen pre-charged steels with relatively low yield strengths under low displacement rates and, finally, to a fully brittle behaviour (mostly intergranular fracture, IG) in the case of steels with the highest strengths, tested at low displacement rates.It was finally demonstrated that only diffusible hydrogen, hydrogen atoms able to move at room temperature, is responsible for hydrogen embrittlement.

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Investigation of hydrogen transport behavior of various low-alloy steels with high-pressure hydrogen gas

Cited by 57 publications

References 32 publications

Micro-Portion Image Analysis of Light Elements in Fe–Cr Based Alloys by Time-of-Flight Secondary Ion Mass Spectrometry

Micro-Portion Image Analysis of Light Elements in Fe–Cr Based Alloys by Time-of-Flight Secondary Ion Mass Spectrometry

Effects of hydrogen on the fracture toughness of CrMo and CrMoV steels quenched and tempered at different temperatures

Effects of hydrogen on the fracture toughness of 42CrMo4 steel quenched and tempered at different temperatures

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