Abstract
The ultrasonic laser method and an instrument for the measurement of residual stresses with an inclined acousto-optical transducer (UDL-2M laser ultrasonic flaw detector) are presented. The results of experimental investigations of variations in the rate of propagation of an ultrasonic wave in samples made of steel in compression testing are presented. The results demonstrate that the method is sufficiently sensitive for the purpose of determining the stresses in a subsurface layer of the sample. External factors that tend to vary the rate of propagation of ultrasonic waves are considered.
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