Metal Surface Nanocrystallization by Ultrasonic Shot Peening
Ultrasonic Shot Peening (Stressonic®) generates, when specific conditions are applied, a severe plastic deformation of the work piece surface. This plastic deformation allows the formation of nanocrystallized grains which change on surface properties. The main advantage of the method is that it's purely mechanical; it doesn't require any chemical or heat treatment.
The objectives of the nanocrystallisation could be:
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