Ultrasonic phased array length measurement of internal detects in butt weld

Length measurement of internal defects in butt welds is very important for the quantitative assessment of ultrasonic testing. Ultrasonic phased array testing technology has been widely used because of great detection rate and detection efficiency. We analyzed characteristics and causes of ultrasonic phased array length measurement to provide an important basis for ultrasonic phased array testing process optimization and defect assessment of the butt weld, Firstly, CIVA numerical simulation software is used to simulate length measurement of ultrasonic phased array and conventional ultrasonic inspection. Secondly, some experiments are implemented including ultrasonic phased array testing, conventional ultrasonic testing and ray detection in butt weld testing plate and the results are compared and analyzed. Finally, according to simulation and experimental results, length measurement of typical internal defects in the butt weld has its own characteristics, which is closely related to the type of defect, the distance between probe and the weld, amplitude calibration, wedge block size and non deflection direction of acoustic beam diffusion, and other factors.