研究目的
To increase the efficiency and sensitivity of the laser-acoustic method for non-destructive testing of metal products, particularly in detecting surface defects of microscopic dimensions, and to improve the detail of 3D visualization of testing results.
研究成果
Changing the mode of detection of surface waves expanded the capabilities of the laser-acoustic method in detecting surface cracks with a width of less than 30 microns. Constructing three-dimensional images of defects allows for determining not only geometrical parameters but also the shape of the defect, improving the assessment of their criticality. The method's efficiency can be enhanced by reducing the quantization step, suggesting the use of a continuous movement system for the laser beam-detector.
研究不足
The method's sensitivity to small inhomogeneities is limited by the threshold value for time change, which may overlook small defects. Reducing the threshold value is possible but requires careful consideration to avoid false positives. The method's efficiency can be further improved by reducing the quantization step through continuous movement of the laser beam-detector system.
