Evaluating hydrogen embrittlement susceptibility in pipeline steel welds

IF 3.1 4区材料科学 Q2 METALLURGY & METALLURGICAL ENGINEERING

Welding in the World Pub Date : 2026-03-12 DOI:10.1007/s40194-026-02425-y

F. Romero Consuegra, B. T. Alexandrov

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引用次数: 0

Abstract

The objective of this study was to investigate the applicability of the delayed hydrogen cracking test (DHCT), standardized as AMPP TM21453, for evaluating hydrogen embrittlement (HE) susceptibility in pipeline steel welds. A comparative analysis of the HE mechanisms induced by the DHCT and the slow strain rate test (SSRT) was performed by quantifying the mechanical energy of crack nucleation and propagation in failures induced by these tests. The DHCT applies a static tensile load below the material yield strength (YS) in an electrochemically generated atomic hydrogen environment. Test results of X65 PSL2 steel welds demonstrated that the DHCT generates low-energy HE failures, associated with brittle QC and IG mechanisms, and can differentiate the effects of microstructure and weld profile-induced stress concentration on HE susceptibility. SSRT, performed in atomic hydrogen, induced brittle failures at plastic strains below 2%, showing potential application for evaluating HE susceptibility in pipeline welds for strain-based design service. Analysis of published results from SSRT in high-pressure gaseous hydrogen revealed that the related failure mechanism absorbs mechanical energy of up to three orders of magnitude higher than the DHCT. This was attributed to the large magnitude of plastic strain generated at loading above the material UTS, which is necessary for absorbing a sufficient amount of hydrogen to initiate HE failures.

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管道钢焊缝氢脆敏感性评价

本研究的目的是研究AMPP TM21453标准延迟氢裂纹试验（DHCT）在评估管道钢焊缝氢脆（HE）敏感性中的适用性。通过对慢应变速率试验（SSRT）和高应变速率试验（DHCT）诱导断裂的裂纹形核和扩展的机械能进行量化，对比分析了两种试验诱导断裂的HE机制。DHCT在电化学生成的原子氢环境中施加低于材料屈服强度（YS）的静态拉伸载荷。X65 PSL2钢焊缝的试验结果表明，DHCT产生低能HE破坏，与脆性QC和IG机制有关，并且可以区分微观结构和焊缝形状引起的应力集中对HE敏感性的影响。在原子氢中进行的SSRT在塑性应变低于2%时诱发脆性破坏，显示了在基于应变的设计服务中评估管道焊缝HE敏感性的潜在应用。对高压气态氢中SSRT已发表结果的分析表明，相关失效机制吸收的机械能比DHCT高3个数量级。这是由于在材料UTS上方加载时产生的巨大塑性应变，这是吸收足够数量的氢以引发HE失效所必需的。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Welding in the World METALLURGY & METALLURGICAL ENGINEERING-

CiteScore

4.20

自引率

14.30%

发文量

181

审稿时长

6-12 weeks

期刊介绍： The journal Welding in the World publishes authoritative papers on every aspect of materials joining, including welding, brazing, soldering, cutting, thermal spraying and allied joining and fabrication techniques.