基于声发射和DIC的金属材料氢脆性能测试实验  

Experimental study of hydrogen embrittlement properties in metallic materials using acoustic emission and digital image correlation

作　　者：蒋鹏[1] 吴爽 黄洋 邢雷[1] 张丰运 JIANG Peng;WU Shuang;HUANG Yang;XING Lei;ZHANG Fengyun(School of Mechanical Science and Engineering,Northeast Petroleum University,Daqing 163318,China;School of Petroleum Engineering,Northeast Petroleum University,Daqing 163318,China)

机构地区：[1]东北石油大学机械科学与工程学院,黑龙江大庆163318 [2]东北石油大学石油工程学院,黑龙江大庆163318

出　　处：《实验技术与管理》2024年第6期20-27,共8页Experimental Technology and Management

基　　金：黑龙江省教育科学规划重点课题(GJB1320048,GJB1422141);黑龙江省高等教育教学改革工程项目(SJGY20220241)。

摘　　要：该实验针对天然气掺氢管道混输过程中产生的临氢金属氢脆问题,以X80管线钢为对象,采用声发射与数字图像相关(DIC)技术相结合的方法实现氢脆性能的动态测试。实验设计为对材料进行充氢后拉伸,采用电化学充氢法充氢,并设置4种不同充氢时间。拉伸过程中通过DIC技术测量并计算静态氢脆性能参数和氢脆敏感系数,同时利用等效应变云图和声发射计数峰值时域分布的变化规律作为氢脆性能的动态参量,进而建立一套完整的金属氢脆性能动态测试系统。该实验适合作为学生研究型教学实验,有助于培养学生的科研能力和创新意识。[Objective]The“Blue Book on Infrastructure Development of China’s Hydrogen Energy Industry(2016)”highlights that a key mid-term goal(2020–2030)for the development of China’s hydrogen energy industry is to demonstrate the application of hydrogen-doped natural gas pipeline transportation technology.This initiative will pave the way for the transition into a carbon-neutral“hydrogen energy era.”At present,while China’s natural gas pipeline transportation technology has matured,the issue of hydrogen embrittlement in metal materials,resulting from the addition of hydrogen for transportation,remains unresolved.Traditional methods for determining hydrogen embrittlement performance primarily rely on static measurement techniques,which lack a combination of static and dynamic measurement methods to assess hydrogen embrittlement performance from the perspective of its evolution process.[Methods]To address this gap,our experiment employs a simulation of the hydrogen environment encountered by pipeline steel during the hydrogen storage process in pipelines.This is achieved through mechanical axial tension,following the electrochemical hydrogenation of X80 pipeline steel.The testing is divided into two parts:hydrogen concentration testing and dynamic tensile testing of the hydrogen specimens.Digital image correlation(DIC)technology plays a crucial role in assessing the static parameters related to the hydrogen embrittlement performance of hydrogen-filled specimens.These parameters include the strain distribution,elongation,cross-sectional shrinkage,and hydrogen embrittlement sensitivity coefficient.The dynamic parameters of the material hydrogen embrittlement performance under different diffusion hydrogen concentrations can be derived by combining the peak time-domain distribution of the acoustic emission counting rate.Both acoustic emission and DIC technology can achieve full dynamic testing of the entire tensile damage evolution process during the experiment.[Results]The experimental results show the followin

关 键 词：电化学充氢 声发射监测 数字图像相关技术 实验设计 

分 类 号：TE88[石油与天然气工程—油气储运工程]