Patent ID: 9365908
Filing Date: 2016-06-14
CPC Classification: C21D

Claim Text:
1. A method of cavitation peening a target material, the method comprising: providing a volume of a first liquid; pressurizing a second liquid to a pressure greater than 15,000 pounds per square inch (PSI); submerging a target surface of the target material in the first liquid; forming a high velocity liquid jet from the pressurized second liquid; and directing the high velocity liquid jet through the first liquid over and near the target surface of the target material in a direction substantially parallel to the target surface without the pressurized second liquid striking the target surface to increase beneficial residual stresses in the target material, the high velocity liquid jet emanating a cavitation layer directly contacting and treating an area of the target surface, the cavitation layer having a length at least as long as a portion of the high velocity liquid jet travelling over and substantially parallel to the target surface.