| CPC B24C 1/10 (2013.01) [B08B 3/12 (2013.01); B08B 9/0321 (2013.01); B24C 3/04 (2013.01); B24C 3/325 (2013.01); B24C 5/04 (2013.01); B24C 7/0038 (2013.01); B24C 9/00 (2013.01); B33Y 40/20 (2020.01); C21D 7/06 (2013.01); B29C 2071/0045 (2013.01)] | 20 Claims |

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1. A method of surface treating an internal surface of a part, the method comprising:
directing a stream of cavitated fluid, by a nozzle, in a first direction away from the internal surface of the part and into contact with a deflection surface of a deflection tool, wherein the deflection tool is fixed, relative to the internal surface of the part, and the nozzle is movable, relative to the deflection tool;
deflecting the stream of cavitated fluid off of the deflection surface in a second direction toward the internal surface of the part; and
impacting the internal surface of the part with the stream of cavitated fluid deflected off of the deflection surface.
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