Abstract
The non-detective testing is usually applied for the inspection of defects of welded structures and casting parts of machines. The Ultrasonic testing (UT) is safer and more inexpensive compared to other non-detective methods such as the X-rays testing.Therefore, UT is gradually expanded the application region. But even now, when applying UT for complicated structure, it is very difficult no only to evaluate the defect size, shape, and location precisely but also to determine the proper probe position for detecting. It is because that we cannot observe how the ultrasonic wave is propagating in specimen and reflecting at defects and specimen boundary.In this study, the numerical simulation software of ultrasonic wave propagation has been developed to obtain the high performance of Ultrasonic Testing, and the Neural Network and Migration techniques have been examined to evaluate the defect properties.
