An ultrasonic measurement method has been developed to determine the crystal growth angle of a unidirectional solidification material by using an ultrasonic array probe. The crystal growth direction of a unidirectional solidified nickel based superalloy are derived within an error of ±5 degrees by evaluating wave height levels of echoes measured with focal laws of each assumed crystal growth angle. Moreover, high precision ultrasonic testing is realized based on the focal laws considering the acoustic anis...
英字タイトル:
Development of Ultrasonic Phased Array Testing Method for Unidirectional Solidification Materials