Publication date : 10 nov. 2015 – Publication description : Engineer’s technic
Ultrasonic determination of residual stress is based on the dependence of the propagation velocity of the ultrasonic wave with the stress state in the material. When a material is subjected to stress, there is a variation of the propagation velocity of the ultrasonic wave. Residual stress is generally defined as the internal forces that remain in the mechanical parts when they are not subject to any external force.
In this article, different steps of the ultrasonic method are presented namely the principal of the stress measurement, application examples realized on the mechanical parts and an overview on futures developments of the ultrasonic method.