基于声发射的电化学充氢时间对X100管线钢力学性能和断裂韧度的影响

doi:10.3901/JME.2019.20.160

机械工程学报 ›› 2019, Vol. 55 ›› Issue (20): 160-167.doi: 10.3901/JME.2019.20.160

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基于声发射的电化学充氢时间对X100管线钢力学性能和断裂韧度的影响

李小巍¹, 徐连勇², 韩永典²

1. 海洋石油工程股份有限公司天津 300461;
2. 天津大学材料科学与工程学院天津 300350

收稿日期:2018-12-22 修回日期:2019-06-20 出版日期:2019-10-20 发布日期:2020-01-07
通讯作者: 韩永典(通信作者),男,1983年出生,博士,副教授。主要从事焊接结构可靠性方面的研究。E-mail:hanyongdian@tju.edu.cn
作者简介:李小巍,男,1969年出生,硕士,高级工程师。主要从事海洋工程管线钢及其焊接方面的研究工作。E-mail:lixw@mail.cooec.com.cn

Effect of Electrochemical Charging Time on Mechanical Property, Fracture Toughness of X100 Pipeline Steel Based on Acoustic Emission Monitoring

LI Xiaowei¹, XU Lianyong², HAN Yongdian²

1. Offshore Oil Engineering Co., Ltd., Tianjin 300461;
2. School of Materials Science and Engineering, Tianjin University, Tianjin 300350

Received:2018-12-22 Revised:2019-06-20 Online:2019-10-20 Published:2020-01-07

摘要/Abstract

摘要： X100在海洋石油领域具有广泛应用前景，服役过程中不可避免受到氢的影响。以API X100管线钢为研究对象，通过电化学试验和声发射监测等试验方法，研究不同电化学充氢时间对管线钢力学性能和断裂韧度的影响；结合微观形貌，探究充氢时间与X100管线钢作用机理。结果表明：管线钢本身具有良好的强韧性，电化学引入氢后，材料的屈服强度和抗拉都会降低，且随着充氢时间的增加，性能恶化加剧。充氢后，材料性能的恶化，主要归因于引入的氢会扩散到材料的应力集中缺陷处，与缺陷处组织发生交互，最终导致材料性能变化。研究结果可为高强钢服役时的性能劣化预测及开裂监控提供依据。

关键词: API X100管线钢, 电化学充氢, 声发射监测, 强韧性

Abstract: Taking API X100 pipeline steel as the research object, the effects of different electrochemical hydrogen charging time on the mechanical properties and fracture toughness of pipeline steel are studied by electrochemical experiments and acoustic emission monitoring. The mechanism between hydrogen charging time and X100 pipeline steel is explored based on the micro-morphology. The results show that pipeline steel itself has good strength and toughness, when hydrogen is electrochemically introduced, the yield strength and tensile strength of the material will decrease, and the performance deterioration will intensify with the increase of hydrogen charging time. After hydrogen charging, the deterioration of material properties is mainly attributed to the diffusion of hydrogen into the stress concentration defects, which interact with the defect structure and ultimately lead to the change of material properties. These factor scan provide some reference for safe service of high strength low alloy steel.

Key words: X100 pipeline steel, hydrogen charging, acoustic emission, strength and toughness

中图分类号:

TB333

李小巍, 徐连勇, 韩永典. 基于声发射的电化学充氢时间对X100管线钢力学性能和断裂韧度的影响[J]. 机械工程学报, 2019, 55(20): 160-167.

LI Xiaowei, XU Lianyong, HAN Yongdian. Effect of Electrochemical Charging Time on Mechanical Property, Fracture Toughness of X100 Pipeline Steel Based on Acoustic Emission Monitoring[J]. Journal of Mechanical Engineering, 2019, 55(20): 160-167.

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基于声发射的电化学充氢时间对X100管线钢力学性能和断裂韧度的影响

Effect of Electrochemical Charging Time on Mechanical Property, Fracture Toughness of X100 Pipeline Steel Based on Acoustic Emission Monitoring

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