管线钢动态应力下的原位氢渗透测试实验方法  

Experimental Method for In-situ Hydrogen Permeation of Pipeline Steel under Dynamic Stress Conditions

作　　者：邢云颖[1] 赵茜 杨芝乐 XING Yunying;ZHAO Qian;YANG Zhile(Technical Support Center for Prevention and Control of Disastrous Accidents in Metal Smelting,University of Science and Technology Beijing,Beijing 100083,China;Institute for Advanced Materials and Technology,University of Science and Technology Beijing,Beijing 100083,China)

机构地区：[1]北京科技大学金属冶炼重大事故防控技术支撑基地,北京100083 [2]北京科技大学新材料技术研究院,北京100083

出　　处：《实验室研究与探索》2025年第1期64-68,90,共6页Research and Exploration In Laboratory

基　　金：国家自然科学基金青年基金项目(52301075);教育部博士后科学基金第73批面上项目(2023M730211)。

摘　　要：管线钢在应力条件下的氢渗透行为研究能够为管线钢在复杂应力状态下的氢脆风险评估提供支撑。在常规氢渗透测试方法和原理的基础上,利用实验室现有力学加载设备,设计了“管线钢动态应力下的原位氢渗透”实验装置,研究了交变应力与氢的交互作用对氢渗透行为的影响。结果表明,交变应力条件下,氢渗透通量表现出与交变应力无相位差的波形特征;氢渗透通量的变化幅值随峰值应力的增加而增加,随交变频率的增加而降低;应力的变化在氢渗透曲线上可以实时得到反馈,应力状态改变导致的材料内部缺陷增加也能在氢渗透曲线上得到反馈。Evaluating the hydrogen permeation behavior of pipeline steel under stress conditions can provide support for the risk assessment of hydrogen embrittlement of pipeline steel under complex stress states.On the basis of conventional hydrogen permeation testing methods and principles,an experimental device for in-situ hydrogen permeation of pipeline steel under dynamic stress loading conditions was designed using existing mechanical loading equipment in the laboratory.The influence of the interaction between alternating stress and hydrogen on hydrogen permeation behavior was studied.The results show that under alternating stress conditions,hydrogen permeation flux exhibits waveform characteristics with no phase difference from alternating stress.The amplitude of hydrogen permeation flux increases with the increase of peak stress and decreases with the increase of alternating frequency.The changes in stress can be fed back in real-time on the hydrogen permeation curve.The increase in internal defects caused by changes in stress state can be reflected in the hydrogen permeation curve.

关 键 词：管线钢 动态应力 原位氢渗透 慢应变速率拉伸 交变载荷 

分 类 号：TE83[石油与天然气工程—油气储运工程]