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Laser ultrasonic technique for surface defects detection of 6061 aluminum alloy 被引量:2

针对6061铝合金材料表面缺陷的激光超声检测(英文)
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摘要 In order to estimate and detect the surface defect depth of metals, the transmission method of laser ultrasonic surface waves is used in this work. The laser ultrasonic detection platform taking use of thermoelastic mechanism as acoustic signal excitation method and interference receiver as acoustic signal receiver method was built, by which B-scan images of detected specimens with surface defects were collected to establish the relationship between the transmission coefficient and depth of the surface defect. Experimental results show that the amplitude of transmitted acoustic signal is related to the depth of surface defect. At last, a fitted curve of transmission coefficient using measured experimental data is obtained to estimate depth of surface defect on the 6061 aluminum alloy. Furthermore, a surface defect depth of 0.3 mm is estimated by the fitting curve with an estimated error of 16%. Therefore, a experimental method using the transmission method by laser ultrasonic is presented in this paper.
作者 LI Hai-yang WEI Zhuang-zhuang PAN Qiang-Hua 李海洋;魏壮壮;潘强华(中北大学信息与通信工程学院,山西太原030051;中国特种设备检测研究院,北京100029)
出处 《Journal of Measurement Science and Instrumentation》 CAS CSCD 2019年第3期293-298,共6页 测试科学与仪器(英文版)
基金 National Natural Science Foundation of China(No.11604304) High School Science and Technology Innovation Project of Shanxi Province Applied Basic Research Project of Shanxi Province(Nos.201701D221127,201801D121160)
关键词 laser ultrasonics transmission method surface defect depth detection 激光超声 透射法 表面缺陷 深度检测
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