The present paper concerns investigation of the stress-state in materials by ultrasonic technique. The velocities of ultrasonic surface waves are measured in different directions on the surface of rolled steel sheets. The signal processing and cross spectra methods are used to study the stress in a steel sample.
We report the results of the stress evaluation of rolled carbon steel cantilever using different non destructive methods. The paper describes the procedure of calibration and measurements using Barkhausen effect and ultrasonic method. Test object is constant stress cantilever submitted to differ ent loads. Both methods complement and provide better reliability of the stress state evaluation.
Abstract. The paper presents an experimental study of deformations of mild steel samples by magnetic Barkhausen, magnetoacoustic and ultrasonic methods. The purpose of the study is to investigate and analyze the dependence between mechanical, magnetic and acoustic properties and to find appropriate parameters for stress state evaluation in the elastic and plastic regions.
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