Assessment of the influence of temperature and magnetic field on the measurement of the stress-strain state in the elements of metal structures

The integrity of metal structures can be greatly influenced by residual stresses, the appearance of which is facilitated by heating and cooling of the material, causing phase and structural transformations, as well as thermal stresses in an inhomogeneous temperature field and structural transformations. For stress estimation, the most promising is the acoustoelastic method based on the measurement of elastic wave velocities. Therefore, the velocities of ultrasonic waves must be evaluated with high accuracy. This paper presents the results of a study of the influence of the temperature of the object of control and the magnetic field on the velocity of a wave polarized in mutually perpendicular directions when assessing the stress-strain state in the elements of metal structures by the method of acoustoelasticity. When the standard sample CO-2 is heated, the velocity of the transverse wave decreases and does not change when exposed to the applied and residual magnetic field.