Abstract:

The conventional ultrasonic water immersion C-Scan system has disadvantages such as small scanning step distance, low efficiency and inflexibility because the fixed focal depth transducer are adopted. To improve the detection efficiency and applicability of ultrasonic water immersion C-Scan system, the software and hardware of ultrasonic phased array water immersion C-Scan system is developed which based on the electronic linear scanning method and imaging algorithm combined with the three degree-freedom mechanical scanning device. A phased array transducer with 64 elements is used to detect the imperfections of aluminum alloy plate and additive manufactured titanium alloy and evaluate the performance of the detection system. The results show that the developed system has greatly improved the detection efficiency and the detection ability compared to the conventional ultrasonic water immersion C-Scan system.

Key words: detection system, immersion C-Scan, ultrasonic phased array, non-destructive testing(NDT)