Influence of uniaxial extension of C01Mn2Si1 steel samples after heat treatment on the structural noise

Resumo

In ultrasonic structure analysis, a new approach is proposed to the assessment of metal structure in terms of the amplitude ratio of the mean structural noise and the secondary Rayleigh wave. The change in structural noise in the uniaxial extension of C01Mn2Si1 steel is investigated. The influence of mechanical stress and the structural state of the metal on the structural noise is demonstrated. The parameters of the structural noise are related to the structural state of C01Mn2Si1 steel. Experiments confirm that the sharp drop in structural noise at the yield point offers a sensitive method of detecting structural changes in the metal. Hence, measurement of the structural noise may be recommended for the detection of an early stage of damage accumulation in the metal—the stage of microdefect accumulation.