Study on the Detection of the Bimetallic Composite Materials Jointing Element Using an F-Scan Ultrasonic Imaging System
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摘要: 随着技术和需求的发展，人们对检测的要求不再仅仅是判断缺陷的有无，而是希望能够通过直观的图像显示出缺陷的全貌，从中得到可靠的分析结果。对于一些较薄的金属复合材料，手工检测存在很大难度，甚至无法进行检测。针对小构件、异形构件、薄壁金属复合材料工件，提出利用超声特征扫描成像检测系统对金属复合材料的质量进行检测。通过对时域超声信号的分析，从超声信号本身以及材料缺陷两方面进行特征提取和分析成像，给出结合层连接质量的定量化直观结果，减少扩散焊缺陷的漏检和误检问题，实现对双金属复合材料扩散焊质量的无损检测与评价。Abstract: As the technology developing in the modern time, the requirements of detecting is not only finding out whether there are any flaws, but also getting some reliable analysis by the visualized image of the flaw. For these defects, it usually uses the universal ultrasonic testing method to detect them, but for the especial, small or thin metal composites, it has a lot of difficulties in the universal testing method, even sometimes, it can not be detected. The study is using the F-scan ultrasonic imaging testing system to detect the bonding layer of the metal composites. The establishment of whole wave train recording and processing of ultrasonic testing signal makes the system a full-information processing ability of the waveform features and flaw features. Then through analyzing and evaluating the information of the images, the layered detects of bonding layer can be found out. This paper is to present the quantitative direct results for the connective quality of bonding layer, which can avoid missing the defects or mistaking the defects. Present method can realize the detection and evaluation of the metal composite materials by diffusion-welding.
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