{"title":"Surface imaging using total focusing method on surface waves for non destructive testing","authors":"Mathieu Ducousso , Olivier Ghibaudo , Stéphane Amiel","doi":"10.1016/j.ndteint.2024.103176","DOIUrl":null,"url":null,"abstract":"<div><p>We demonstrate the effectiveness of total focusing methods (TFM) using Rayleigh waves for surface and sub-surface nondestructive inspection of different metals. The relatively low velocity of Rayleigh waves leads to sub-100 μm resolution imaging, with a penetration depth approximately equal to its wavelength. This allows for imaging and sizing sub-millimetric holes, possibly on coated material, as well as cracks, segregations, and other defects. The waves can propagate over long distances and works with curved surfaces or very close to edges. This shows potential for a new type of real-time surface inspection of large surfaces, with excellent spatial resolution. The process is free of chemical preparation and cleaning, and can be fully automated, from acquisition to decision or for making surface digital twin.</p></div>","PeriodicalId":18868,"journal":{"name":"Ndt & E International","volume":"146 ","pages":"Article 103176"},"PeriodicalIF":4.1000,"publicationDate":"2024-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Ndt & E International","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0963869524001415","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"MATERIALS SCIENCE, CHARACTERIZATION & TESTING","Score":null,"Total":0}
引用次数: 0
Abstract
We demonstrate the effectiveness of total focusing methods (TFM) using Rayleigh waves for surface and sub-surface nondestructive inspection of different metals. The relatively low velocity of Rayleigh waves leads to sub-100 μm resolution imaging, with a penetration depth approximately equal to its wavelength. This allows for imaging and sizing sub-millimetric holes, possibly on coated material, as well as cracks, segregations, and other defects. The waves can propagate over long distances and works with curved surfaces or very close to edges. This shows potential for a new type of real-time surface inspection of large surfaces, with excellent spatial resolution. The process is free of chemical preparation and cleaning, and can be fully automated, from acquisition to decision or for making surface digital twin.
期刊介绍：
NDT&E international publishes peer-reviewed results of original research and development in all categories of the fields of nondestructive testing and evaluation including ultrasonics, electromagnetics, radiography, optical and thermal methods. In addition to traditional NDE topics, the emerging technology area of inspection of civil structures and materials is also emphasized. The journal publishes original papers on research and development of new inspection techniques and methods, as well as on novel and innovative applications of established methods. Papers on NDE sensors and their applications both for inspection and process control, as well as papers describing novel NDE systems for structural health monitoring and their performance in industrial settings are also considered. Other regular features include international news, new equipment and a calendar of forthcoming worldwide meetings. This journal is listed in Current Contents.
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