Profile: LETS Global USA specializes in providing engineering and consulting services. Ultrasonic peening treatment is a fatigue life improvement technique which is used in the application of ultrasonic and mechanical-impulses to the high stressed locations in the weld. As a result of these ultrasonic and mechanical impulses, the welded metal is modified at the atomic and/or metallurgical-level. The stress concentrations as well as the residual stress, both caused by the welding process are relieved, and the general fatigue strength of the structure is increased. We design and manufacture custom-built manual & robotic ultrasonic equipment.