气相环境中氢气及组织对X65管线钢焊接接头慢应变速率拉伸性能的影响

IF 7.4 1区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Corrosion Science Pub Date : 2025-07-13 DOI:10.1016/j.corsci.2025.113179

Youfu Xiao , Chenyu Ma , Yun Cheng , Fuyang Wang , Xue Liu , Lianyong Xu , Yongdian Han

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引用次数: 0

摘要

采用慢应变速率拉伸法（SSRT）研究了X65管线钢焊接接头在混氢天然气环境下的拉伸性能和氢脆敏感性。采用主成分分析法计算了焊接接头各区域的氢脆敏感性指数（IPC1），结果表明热影响区（HAZ）的氢脆敏感性最高。氢分压超过1.5 MPa时，氢脆风险显著增加。这种现象是由于M-A组分的氢脆敏感性高，而可逆氢阱的活化能最低。氢诱导的性能退化机制归因于位错钉住效应，氢的吸附抑制位错的迁移，从而降低了材料的塑性变形能力。

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Influence of hydrogen and microstructure in gas phase environment on the slow strain rate tensiling properties of X65 pipeline steel welded joints

This study investigates the tensile properties and hydrogen embrittlement susceptibility of X65 pipeline steel welded joints in hydrogen-blended natural gas environments by slow strain rate tensile (SSRT). The hydrogen embrittlement susceptibility index (I_PC1) of each area in the welded joint is calculated using principal component analysis, showing that the heat-affected zone (HAZ) has the highest susceptibility. The hydrogen embrittlement risk increased significantly when the hydrogen partial pressure exceeds 1.5 MPa. This phenomenon is owing to the high hydrogen embrittlement sensitivity of M-A constituents and the lowest activation energy of reversible hydrogen traps in the HAZ. The hydrogen-induced performance degradation mechanism is attributed to the dislocation pinning effect that hydrogen adsorption inhibits dislocation mobility, consequently diminishing the plastic deformation capacity of material.

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来源期刊

Corrosion Science 工程技术-材料科学：综合

CiteScore

13.60

自引率

18.10%

发文量

763

审稿时长

46 days

期刊介绍： Corrosion occurrence and its practical control encompass a vast array of scientific knowledge. Corrosion Science endeavors to serve as the conduit for the exchange of ideas, developments, and research across all facets of this field, encompassing both metallic and non-metallic corrosion. The scope of this international journal is broad and inclusive. Published papers span from highly theoretical inquiries to essentially practical applications, covering diverse areas such as high-temperature oxidation, passivity, anodic oxidation, biochemical corrosion, stress corrosion cracking, and corrosion control mechanisms and methodologies. This journal publishes original papers and critical reviews across the spectrum of pure and applied corrosion, material degradation, and surface science and engineering. It serves as a crucial link connecting metallurgists, materials scientists, and researchers investigating corrosion and degradation phenomena. Join us in advancing knowledge and understanding in the vital field of corrosion science.