Acoustic Control of Fatigue Damages in Heat Treated Steels

摘要

The original results of the experiment researches of the velocity changes of ultrasonic volume and surface waves in stels after different thermal and mechanical treatment as well as in the process of using the dtrails are given in the paper. The basic regular trends of the structure factors influence to sound velocity measuring for non-destructive testing of the manufacutred articles including railway object are described. The measuring methods of the sound velocity in metal are considered.