Study on the synergistic effect of welding residual stress and hydrogen diffusion on fatigue crack growth of X80 steel pipeline

IF 3 2区工程技术 Q2 ENGINEERING, MECHANICAL

International Journal of Pressure Vessels and Piping Pub Date : 2024-11-18 DOI:10.1016/j.ijpvp.2024.105367

Jinghong Xue, Andun Cheng, Bohan Xia

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Abstract

During the service of X80 high-strength pipeline steel, the combined effects of welding residual stress, cyclic loading, and hydrogen complicate the prediction of pipeline fatigue life. This article combines ABAQUS and FRANC3D finite element software to analyze the fatigue crack growth laws of the X80 pipeline with thickness of 22 mm under the combined condition. After heat treatment, the fatigue life of pipelines with annular and axial cracks increased by 19 % and 83 %, indicating that post-weld heat treatment significantly improves the fatigue life of the pipeline. When the crack grows to the outer surface of the pipeline, the fatigue life of a pipeline with a 10 % hydrogen doping ratio is reduced by 77 % compared to one with a 1.5 % hydrogen doping ratio. These findings indicate that toughness of the crack front region is significantly reduced by hydrogen concentration, the crack propagation rate is accelerated, and the fatigue life of the pipeline is significantly reduced.

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焊接残余应力和氢扩散对 X80 钢管道疲劳裂纹增长的协同效应研究

在 X80 高强度管线钢服役期间，焊接残余应力、循环载荷和氢气的综合影响使管线疲劳寿命的预测变得复杂。本文结合 ABAQUS 和 FRANC3D 有限元软件，分析了厚度为 22 mm 的 X80 管道在综合条件下的疲劳裂纹生长规律。热处理后，出现环向和轴向裂纹的管道疲劳寿命分别提高了 19% 和 83%，表明焊后热处理能显著提高管道的疲劳寿命。当裂纹扩展到管道外表面时，掺氢比率为 10% 的管道的疲劳寿命比掺氢比率为 1.5% 的管道缩短了 77%。这些发现表明，氢浓度会显著降低裂纹前沿区域的韧性，加快裂纹扩展速度，并显著缩短管道的疲劳寿命。

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来源期刊

International Journal of Pressure Vessels and Piping 工程技术-工程：机械

CiteScore

5.30

自引率

13.30%

发文量

208

审稿时长

17 months

期刊介绍： Pressure vessel engineering technology is of importance in many branches of industry. This journal publishes the latest research results and related information on all its associated aspects, with particular emphasis on the structural integrity assessment, maintenance and life extension of pressurised process engineering plants. The anticipated coverage of the International Journal of Pressure Vessels and Piping ranges from simple mass-produced pressure vessels to large custom-built vessels and tanks. Pressure vessels technology is a developing field, and contributions on the following topics will therefore be welcome: • Pressure vessel engineering • Structural integrity assessment • Design methods • Codes and standards • Fabrication and welding • Materials properties requirements • Inspection and quality management • Maintenance and life extension • Ageing and environmental effects • Life management Of particular importance are papers covering aspects of significant practical application which could lead to major improvements in economy, reliability and useful life. While most accepted papers represent the results of original applied research, critical reviews of topical interest by world-leading experts will also appear from time to time. International Journal of Pressure Vessels and Piping is indispensable reading for engineering professionals involved in the energy, petrochemicals, process plant, transport, aerospace and related industries; for manufacturers of pressure vessels and ancillary equipment; and for academics pursuing research in these areas.