Ultrasonic Testing of Heavy Steel Forgings : 1st Report, Reflection from Simulated Discontinuity in Water

抄録

As a fundamental experiment of ultrasonic techniques to be applied to the nondestructive testing of heavy steel forgings, ultrasonic reflection from simulated discontinuities and bottom surfaces were studied in water. Equivalent reflection surfaces of three each simulated discontinuities and bottoms were investigated and the nomograms for the size of discontinuities were established from the ratio of flaw-to-bottom indications and the distances from the transducer to them. The results obtained will not be applied immediately for heavy steel forgings but will be of future value and aid for analysis of reflection phenomena in steel and for the compilation of inspection data.