Prediction of mechanical properties of hot rolled steel by ultrasonic method

The ultrasonic attenuation and the velocity in hot rolled steel have been evaluated by ultrasonic contact measurement. The measured attenuation is calibrated by diffraction correction integral suggested by Lommel. The attenuation is also calculated by the model suggested by Mason. The agreement between the experimentally determined attenuation and the calculated one was good. As the results, the mechanical properties of the ferrite plus pearlite steels could be assessed by the ultrasonic attenuation. The mechanical properties of the martensite plus bainite steels could be assessed by the ultrasonic velocity.