Effect of microstructure on the hydrogen cracking behavior of bimetallic metallurgical clad pipes: The role of precipitated phases and inclusions

IF 8.1 2区工程技术 Q1 CHEMISTRY, PHYSICAL

International Journal of Hydrogen Energy Pub Date : 2025-05-11 DOI:10.1016/j.ijhydene.2025.05.092

Guanghu Yao , Ming Liu , Wenhui Ye , Lining Xu , Jinxu Li , Lijie Qiao , Yu Yan

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Abstract

Bimetallic metallurgical clad pipes are designed to resist corrosion cracking due to hydrogen sulfide. However, they are still susceptible to hydrogen-induced cracking, limiting their safe use in practice. This study investigated the mechanical properties and hydrogen distribution characteristics of alloy 825/L360 bimetallic metallurgical clad pipes through fracture tests and hydrogen distribution experiment. SKPFM and hydrogen microprinting were innovatively combined to characterize local hydrogen distribution in welded materials. This overcame single-scale limits, enabling macro-nano correlation of hydrogen distribution. The fracture behavior of alloy 825/L360 bimetallic clad pipes in a hydrogen environment was explored. Key results: after 133-h hydrogen precharge, specimen elongation loss hit 53 %. Hydrogen cracks started at carbide-containing grain boundaries, with TiN aiding expansion. SKPFM showed M23C6-substrate interfaces had irreversible hydrogen enrichment (6.54 mV–92.84 mV), while TiN inclusions had weak reversible trapping (10 mV fluctuation).

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微观组织对双金属复合管氢裂行为的影响：析出相和夹杂物的作用

双金属冶金包层管的设计是为了防止硫化氢引起的腐蚀开裂。然而，它们仍然容易受到氢诱导开裂的影响，限制了它们在实践中的安全使用。通过断口试验和氢气分布试验，研究了825/L360合金双金属复合管的力学性能和氢气分布特征。创新地将SKPFM和氢微打印相结合，以表征焊接材料中的局部氢分布。这克服了单尺度的限制，使氢分布的宏观-纳米关联成为可能。研究了825/L360合金双金属复合管在氢气环境中的断裂行为。关键结果：预充氢133-h后，试样伸长率损失达到53%。氢裂纹始于含碳化物的晶界，在TiN的帮助下扩展。SKPFM显示，m23c6 -衬底界面存在不可逆的氢富集（6.54 mV - 92.84 mV），而TiN包裹体存在弱可逆的俘获（10 mV波动）。

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来源期刊

International Journal of Hydrogen Energy 工程技术-环境科学

CiteScore

13.50

自引率

25.00%

发文量

3502

审稿时长

60 days

期刊介绍： The objective of the International Journal of Hydrogen Energy is to facilitate the exchange of new ideas, technological advancements, and research findings in the field of Hydrogen Energy among scientists and engineers worldwide. This journal showcases original research, both analytical and experimental, covering various aspects of Hydrogen Energy. These include production, storage, transmission, utilization, enabling technologies, environmental impact, economic considerations, and global perspectives on hydrogen and its carriers such as NH3, CH4, alcohols, etc. The utilization aspect encompasses various methods such as thermochemical (combustion), photochemical, electrochemical (fuel cells), and nuclear conversion of hydrogen, hydrogen isotopes, and hydrogen carriers into thermal, mechanical, and electrical energies. The applications of these energies can be found in transportation (including aerospace), industrial, commercial, and residential sectors.