文献类型：期刊文献

中文题名：不锈钢点蚀损伤的超声Lamb波混频定位与表征

英文题名：Ultrasonic Lamb wave mixing localization and characterization of pitting damage in alloy steel

作者：卞慧敏[1];朱武军[1];肖飚[2];项延训[1]

机构：[1]华东理工大学机械与动力工程学院,上海200237;[2]上海市特种设备监督检验技术研究院,上海200062

年份：2025

卷号：44

期号：6

起止页码：1407

中文期刊名：应用声学

外文期刊名：Journal of Applied Acoustics

收录：;北大核心:【北大核心2023】；

基金：国家重点研发计划项目(2021YFC3001802);国家自然科学基金项目(12327807,12025403,12004114);上海市市场监督管理局科技项目(2024-46)。

语种：中文

中文关键词：Lamb波;非共线混频;点蚀损伤

外文关键词：Lamb wave;Non-collinear mixing;Pitting damage

摘要：针对不锈钢材料早期腐蚀损伤定位检测难题,该文采用超声Lamb波非共线混频方法,开展304奥氏体不锈钢板点蚀损伤的定位与表征研究。基于超声Lamb波频散特性和混频条件,编制超声Lamb波混频模式对高效筛选算法,应用所筛选出的模式对对不同点蚀损伤程度的不锈钢板进行逐点扫查,计算各点的声学非线性参量值定位表征点蚀损伤,进一步观察各个试样点蚀损伤的微观形貌,分析非线性混频的微观作用机理。结果表明:不锈钢板点蚀损伤区域与无损区域非线性参量值相差较大,通过扫查成像重构了损伤区域的位置及形貌;非线性参量在损伤区域内基本一致,且随点蚀时间的增加呈现先增大后减小的趋势。微观作用机理上,发现微小点蚀坑为超声混频的非线性源;损伤区域内微小点蚀坑数量随腐蚀损伤呈先增后减趋势,导致非线性参量随点蚀损伤累积呈先增后减趋势。
This paper aims to address the issue of detecting early corrosion damage in stainless steel materials.The ultrasonic Lamb wave non-collinear mixing method was used to localize and detect pitting damages in 304 austenitic stainless steel plates.Based on ultrasonic Lamb wave dispersion characteristics and mixing conditions,an efficient screening algorithm was developed for ultrasonic Lamb wave mixing triplets.The selected triplet was applied to measure different points of the stainless steel plates with different corrosion damage degree.The acoustic nonlinear parameter values of each point were calculated to locate and characterize the pitting damage.The microscopic mechanism of nonlinear Lamb mixing was then analyzed.The result shows that the nonlinear parameters of the pitting damaged area are much different from that of the non-destructive area.The location and shape of the damaged area are reconstructed by scanning imaging.The nonlinear parameters are basically same in the damage region,and they increase first and then decrease with the increase of pitting time.It is found that the micro-pitting pit is the nonlinear source of ultrasonic mixing.The number of small pitting pits in the damage area increases first and then decreases with the corrosion damage,resulting in the nonlinear parameters increasing first and then decreasing with the accumulation of pitting damage.