STRENGTH PREDICTION BY ULTRASONIC DEFECT CHARACTERIZATION.

The possibility of detecting defects, such as voids, in metals and alloys by ultrasonic methods has been investigated on titanium alloy specimens. The ultrasonic data show dramatic differences in the intensity of the scattered wave and its frequency dependence for the various defect geometries. Comparisons with the results of computer calculations demonstrate the importance of taking into account mode conversion. The results of the tensile tests allow the conclusion that of the three parameters, yield stress, ultimate tensile stress, and ductility, the latter exhibited a sufficiently significant variation to become a meaningful variable for correlations with ultrasonic scattering data.