Improving HIC resistance of pipe-steel by Ti/Mg treatment with insights into hydrogen migration

IF 6.6 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY npj Materials Degradation Pub Date : 2024-03-29 DOI:10.1038/s41529-024-00439-9

Zhixian Peng, Jing Liu, Rongzhe Hu, Shiqi Zhang, Feng Huang, Zhengliang Xue

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Abstract

The presence of inclusions in steels is responsible for hydrogen-induced cracking (HIC), which necessitates control over their size and distribution. The aims of this study are to investigate the effects of different inclusion-modifying elements on steels, as well as reveal the impact of inclusions on hydrogen migration. Various methods, including HIC evaluation, electrochemical hydrogen permeation, silver microprint, and in-situ hydrogen escape observation, are utilized. The results indicate that steel with a Ti/Mg content ratio of 4:1 exhibits favorable comprehensive resistance against HIC. Moreover, the observation of in-situ hydrogen escape observations reveals that steels with a higher number of hydrogen bubbles and a higher ratio of bubbles related to the inclusions demonstrate better HIC resistance. The refined, dispersed, and multi-compounded inclusions facilitate the formation of more complex trapping sites, ultimately improving the dispersion and pinning of dissociative hydrogen atoms. Consequently, employing a multicomponent inclusion modification strategy holds promise for the development of hydrogen-resistant pipeline steel.

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通过钛/镁处理提高钢管的抗 HIC 性能，深入了解氢迁移问题

钢中夹杂物的存在是氢致开裂（HIC）的原因，因此必须控制夹杂物的大小和分布。本研究的目的是调查不同夹杂物改性元素对钢材的影响，并揭示夹杂物对氢迁移的影响。研究采用了多种方法，包括 HIC 评估、电化学氢渗透、银微印迹和原位氢逸观察。结果表明，Ti/Mg 含量比为 4:1 的钢具有良好的抗 HIC 综合能力。此外，原位氢逃逸观测结果表明，氢气泡数量越多、与夹杂物相关的气泡比例越高的钢材，其抗 HIC 性能越好。细化、分散和多复合夹杂物有助于形成更复杂的捕获点，最终改善离解氢原子的分散和钉扎。因此，采用多组分夹杂物改性策略有望开发出抗氢管道钢。

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来源期刊

npj Materials Degradation MATERIALS SCIENCE, MULTIDISCIPLINARY-

CiteScore

7.80

自引率

7.80%

发文量

审稿时长

6 weeks

期刊介绍： npj Materials Degradation considers basic and applied research that explores all aspects of the degradation of metallic and non-metallic materials. The journal broadly defines ‘materials degradation’ as a reduction in the ability of a material to perform its task in-service as a result of environmental exposure. The journal covers a broad range of topics including but not limited to: -Degradation of metals, glasses, minerals, polymers, ceramics, cements and composites in natural and engineered environments, as a result of various stimuli -Computational and experimental studies of degradation mechanisms and kinetics -Characterization of degradation by traditional and emerging techniques -New approaches and technologies for enhancing resistance to degradation -Inspection and monitoring techniques for materials in-service, such as sensing technologies