Sonats was founded in 1 992 by Patrick Cheppe and Jean-Michel Duchazeaubeneix in Nantes on the west cost of France. The company presently employs 25 people. It was launched in the field of Stresses Characterization to optimize the process manufacturing and parts behavior by taking into account the residual stresses levels. Sonats proposed solution is to increase components' fatigue life with shot peening. In order to offer an innovative process, the company developed the ultrasonic process we named Stressonic~R The Stressonic~R process is a surface treatment by impacts-throwing balls on a mechanical part. Balls are put in movement by metallic elements forming an acoustic block and vibrating with an ultrasonic frequency. This technology avoids losing balls during the treatment and allows the use of high quality bearing balls instead of conventional medias.
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