Synergistic action of hydrogen and stress concentration on the fatigue properties of X80 pipeline steel

An, Teng; Zheng, Shuqi; Peng, Huangtao; Wen, Xiangli; Chen, Liqiang; Zhang, Lin

doi:10.1016/j.msea.2017.06.029

Cited by 36 publications

(10 citation statements)

References 59 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In all the other grades, ductile features (MVC) are observed in the center of the specimen and brittle areas at the notch tip region [22,23] due to the stress profiles described in Figs. 10,11,12 (see also Figs.…”

Section: Discussionmentioning

confidence: 99%

Effect of hydrogen on the tensile properties of 42CrMo4 steel quenched and tempered at different temperatures

Zafra

Peral

Belzunce

et al. 2018

International Journal of Hydrogen Energy

View full text Add to dashboard Cite

The influence of hydrogen on the mechanical behaviour of a 42CrMo4 tempered martensitic steel was investigated by means of tensile tests on both smooth and circumferentially-notched round-bar specimens pre-charged with gaseous hydrogen in a pressurized reactor. Hydrogen solubility was seen to decrease with increasing tempering temperature. Moreover, hydrogen embrittlement measured in notched specimens was much greater in the grades with higher hardness, tempered at the lowest temperatures, where a change in the fracture micromechanism from ductile in the absence of hydrogen to intermediate and brittle in the presence of hydrogen was clearly observed. Results were discussed through FEM simulations of local stresses acting on the process zone.

show abstract

Section: Discussionmentioning

confidence: 99%

Effect of hydrogen on the tensile properties of 42CrMo4 steel quenched and tempered at different temperatures

Zafra

Peral

Belzunce

et al. 2018

International Journal of Hydrogen Energy

View full text Add to dashboard Cite

show abstract

“…The mechanical and plastic properties tests included static tensile, bending, and impact tests at +20 • C, 0 • C, −10 • C, −20 • C, and −30 • C. The static tensile test was performed on flat samples with a measuring length of 100 mm and a cross-section of 11.0 × 20 mm 2 . Impact tests were performed for the area of the base material (BM), HAZ, and weld (WM) using a standard sample 10 × 10 × 55 mm 3 with a V-notch. After testing, the samples were subjected to fractographic observations using light microscopy (LM) and scanning electron microscopy-SEM (Phenom XL, Thermo Fisher Scientific, Waltham, MA, USA).…”

Section: Methodsmentioning

confidence: 99%

“…The construction of transmission networks, in particular gas pipelines, is a long-term process, and analyzing the individual stages from the concept to design and execution may take several years, while the construction of the entire gas pipeline network is an even longer process. This indicates that the materials used for gas pipelines must meet requirements not only in terms of the chemical composition of natural gas, but also other gaseous media that can ultimately be transported through such pipelines [3], affecting their corrosion conditions [4,5]. Hence, there are tendencies to change the approach in the field of materials used for pipelines, but also in the technology of their connection [6,7].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the Microstructure and Mechanical Properties of the Butt-Welded Joints of Spiral Pipes Made of L485ME (X70) Steel

Tuz

2023

Materials

View full text Add to dashboard Cite

The expansion of the gas pipeline network makes it necessary, on the one hand, to meet the requirements of standards regarding the materials used, but on the other hand, it is necessary to weld them. In the case of natural gas as a fuel, the welding process is widely used, but in the case of replacing natural gas with a mixture of this gas and hydrogen, the requirements regarding the quality of the process must be significantly increased or the process must be completely changed. This article presents the results of testing welded joints for a newly developed welding technology for the transmission of a hydrogen mixture. Material tests were carried out on a butt-circumferential-welded joint made between two spiral pipes with an outer diameter of 711 mm and wall thickness of 11 mm in the X70 grade. The developed welding technology is distinguished by a change in the beveling method of the edges, which allows the heat input to the material to be limited. The technology was developed for use in natural on-shore and off-shore gas pipelines with the addition of hydrogen. As a result, additional requirements in terms of joint plasticity had to be met during welding. The test results obtained indicate that the joints are characterized by high strength (more than 581 MPa), higher than that of the base material (fracture in the base material) and good impact strength at reduced temperature (more than 129 J). In transverse corrosion, a hardness below 250 HV and a favorable structure of ferrite with different morphologies were obtained.

show abstract

“…The samples for the EBSD observations were mechanically ground using 1200 grit SiC emery paper (Changzhou KingCattle Abrasives Co., ltd., Changhou, China) and then polished with 3 and 1 μm diamond pastes. Finally, the surfaces of the samples were electrochemically polished to remove any residual deformations [39]. The EBSD measurements were conducted with a step size of 0.3 μm.…”

Section: Methodsmentioning

confidence: 99%

Hydrogen-Assisted Crack Growth in the Heat-Affected Zone of X80 Steels during in Situ Hydrogen Charging

Feng

An³

et al. 2019

Materials

View full text Add to dashboard Cite

Herein, the hydrogen embrittlement of a heat-affected zone (HAZ) was examined using slow strain rate tension in situ hydrogen charging. The influence of hydrogen on the crack path of the HAZ sample surfaces was determined using electron back scatter diffraction analysis. The hydrogen embrittlement susceptibility of the base metal and the HAZ samples increased with increasing current density. The HAZ samples have lower resistance to hydrogen embrittlement than the base metal samples in the same current density. Brittle circumferential cracks located at the HAZ sample surfaces were perpendicular to the loading direction, and the crack propagation path indicated that five or more cracks may join together to form a longer crack. The fracture morphologies were found to be a mixture of intergranular and transgranular fractures. Hydrogen blisters were observed on the HAZ sample surfaces after conducting tensile tests at a current density of 40 mA/cm2, leading to a fracture in the elastic deformation stage.

show abstract

Synergistic action of hydrogen and stress concentration on the fatigue properties of X80 pipeline steel

Cited by 36 publications

References 59 publications

Effect of hydrogen on the tensile properties of 42CrMo4 steel quenched and tempered at different temperatures

Effect of hydrogen on the tensile properties of 42CrMo4 steel quenched and tempered at different temperatures

Evaluation of the Microstructure and Mechanical Properties of the Butt-Welded Joints of Spiral Pipes Made of L485ME (X70) Steel

Hydrogen-Assisted Crack Growth in the Heat-Affected Zone of X80 Steels during in Situ Hydrogen Charging

Contact Info

Product

Resources

About