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Development of novel non-destructive inspection technique using high-frequency signal transmission characteristics

机译:利用高频信号传输特性开发新型无损检测技术

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A novel non-destructive inspection (NDI) technique that utilizes high-frequency signal transmission characteristics was developed as a more reliable, faster and cheaper NDI technique. This technique forms a transmission circuit that includes the specimen, and detects the signals generated by any surface breaking-defect. In this research, quantitative measurement of closed fatigue cracks was implemented via a newly developed probe. The greatest advantage of this technique is that there is no significant difference in detection of defects in either paramagnetic materials or in ferromagnetic materials. Therefore, the potential effects of corrosion, ferrite content, or deformation martensite on the measurement signals are minimized, and a better S/N ratio can be expected. This technique can also be used to measure the size of defects in components, including welded components, and its detection sensitivity is less than 1 mm for surface breaking-defects.
机译:利用高频信号传输特性的新型无损检测(NDI)技术已被开发为一种更可靠,更快且更便宜的NDI技术。该技术形成包括样本的传输电路,并检测由任何表面破裂缺陷产生的信号。在这项研究中,通过新开发的探针对封闭的疲劳裂纹进行了定量测量。该技术的最大优势在于,顺磁性材料或铁磁性材料中缺陷的检测没有显着差异。因此,腐蚀,铁素体含量或变形马氏体对测量信号的潜在影响被最小化,并且可以期望更好的信噪比。该技术还可以用于测量组件(包括焊接组件)中的缺陷的大小,并且其对于表面破裂缺陷的检测灵敏度小于1 mm。

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