20th International Forgemasters Meeting - IFM 2017

Identifying exact location to be repair for flaw rejected by radiography examination of large casting is important step to optimize production process, since repeated repair process consequent in longer production time and increased cost. Accuracy of flaw location measured by conventional ultrasonic technique is very dependent on inspector’s skill, consequently has considerable human error. Applying phased array ultrasonic technique definitely has possibility to enhance measurement accuracy, however complex shape of casting product limits proper contact of phased array probe which is essential for valid ultrasonic coupling. In this study, application process of flexible phased array for measuring flaw location was optimized. The result shows considerable possibility to enhance the accuracy of defect location measurement, and to reduce repeating repair process.