Effect of Nb on microstructure and corrosion resistance of X80 pipeline steel

Xia, F.; Li, Zhiwei; Ma, Ming; Zhao, Yupei; Wu, Changjun; Su, Xuping; Peng, Haoping

doi:10.1016/j.ijpvp.2023.104949

Cited by 12 publications

(2 citation statements)

References 37 publications

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“…By optimizing the material structure, it is possible to reduce the impact of material structure on weld quality and improve the mechanical performance of the welds. Additionally, this approach enhances the protection and crack resistance of the steel against hydrogen damage [70]. The following methods can be employed for optimization: (1) Optimize steel material selection: Prioritize the selection of low-carbon, low-alloy steels with high strength, good toughness, and weldability.…”

Section: Pipeline Materials Structure Optimizationmentioning

confidence: 99%

Research Progress and Prospects on Hydrogen Damage in Welds of Hydrogen-Blended Natural Gas Pipelines

Ban,

Yan,

Song

et al. 2023

Processes

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Hydrogen energy represents a crucial pathway towards achieving carbon neutrality and is a pivotal facet of future strategic emerging industries. The safe and efficient transportation of hydrogen is a key link in the entire chain development of the hydrogen energy industry’s “production, storage, and transportation”. Mixing hydrogen into natural gas pipelines for transportation is the potential best way to achieve large-scale, long-distance, safe, and efficient hydrogen transportation. Welds are identified as the vulnerable points in natural gas pipelines, and compatibility between hydrogen-doped natural gas and existing pipeline welds is a critical technical challenge that affects the global-scale transportation of hydrogen energy. Therefore, this article systematically discusses the construction and weld characteristics of hydrogen-doped natural gas pipelines, the research status of hydrogen damage mechanism, and mechanical property strengthening methods of hydrogen-doped natural gas pipeline welds, and points out the future development direction of hydrogen damage mechanism research in hydrogen-doped natural gas pipeline welds. The research results show that: ① Currently, there is a need for comprehensive research on the degradation of mechanical properties in welds made from typical pipe materials on a global scale. It is imperative to systematically elucidate the mechanism of mechanical property degradation due to conventional and hydrogen-induced damage in welds of high-pressure hydrogen-doped natural gas pipelines worldwide. ② The deterioration of mechanical properties in welds of hydrogen-doped natural gas pipelines is influenced by various components, including hydrogen, carbon dioxide, and nitrogen. It is necessary to reveal the mechanism of mechanical property deterioration of pipeline welds under the joint participation of multiple damage mechanisms under multi-component gas conditions. ③ Establishing a fundamental database of mechanical properties for typical pipeline steel materials under hydrogen-doped natural gas conditions globally is imperative, to form a method for strengthening the mechanical properties of typical high-pressure hydrogen-doped natural gas pipeline welds. ④ It is essential to promptly develop relevant standards for hydrogen blending transportation, welding technology, as well as weld evaluation, testing, and repair procedures for natural gas pipelines.

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Section: Pipeline Materials Structure Optimizationmentioning

confidence: 99%

Research Progress and Prospects on Hydrogen Damage in Welds of Hydrogen-Blended Natural Gas Pipelines

Ban,

Yan,

Song

et al. 2023

Processes

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“…Therefore, a clear consensus has still not been achieved on the influence of Nb on the low-temperature toughness of steel. Although several researchers have examined the influence of Nb content on the phase transformation and properties of pipeline steel [13][14][15][16][17][18], they have mainly focused on the phase transformation points, microstructural composition, and grain size, and the inherent structural factors that affect the toughness have been mostly ignored.…”

Section: Introductionmentioning

confidence: 99%

Effect of Nb Content on the Microstructure and Impact Toughness of High-Strength Pipeline Steel

Jiang,

Zhang,

Guo

et al. 2023

Metals

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In this study, X80 pipeline steel is prepared with different Nb contents through the thermo-mechanically controlled rolling process. The effects of using two different Nb contents on the impact toughness and microstructure of the pipeline steel are examined using various experimental techniques. The results show that with the increase in Nb content, the transformation temperature Ar3 decreases, and the nucleation and growth of bainitic ferrite with lath features (LB) are promoted, while those of granular bainite (GB) are inhibited. In addition, the stability of the austenite phase increases with the increase in Nb content. Therefore, the volume fractions of LB and martensite–austenite (M/A) constituents increase, while the proportion of high-angle grain boundaries (HAGBs) decreases. The impact energy of pipeline steel at −45 °C is closely related to the Nb content. Specifically, the impact energy decreases from 217 J at 0.05 wt.% Nb to 88 J at 0.08 wt.% Nb. The cracks are preferentially formed near the M/A constituents, and the HAGBs significantly inhibit the crack propagation. The steel with 0.05 wt.% Nb has a lower content of M/A constituents and a higher proportion of HAGBs than the one with 0.08 wt.% Nb. In addition, as the Nb content increases, the crack initiation energy and the crack propagation energy decrease. Thus, the 0.05 wt.% Nb steel has a higher low-temperature impact energy.

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Examining the Impact of Producer Gas in Specific Regions of Pipeline Materials of Producer Gas Systems

Vivek,

Srividhya

2024

J. of Materi Eng and Perform

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Effect of Nb on microstructure and corrosion resistance of X80 pipeline steel

Cited by 12 publications

References 37 publications

Research Progress and Prospects on Hydrogen Damage in Welds of Hydrogen-Blended Natural Gas Pipelines

Research Progress and Prospects on Hydrogen Damage in Welds of Hydrogen-Blended Natural Gas Pipelines

Effect of Nb Content on the Microstructure and Impact Toughness of High-Strength Pipeline Steel

Examining the Impact of Producer Gas in Specific Regions of Pipeline Materials of Producer Gas Systems

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