Cavitation Water Jet Peening

An innovative processing technology that improves the fatigue strength and life of metal parts by utilizing water.
Cavitation water jet peening used on a metal part

High pressure water is jetted into the water at high speed from a special cavitation-promoting (air bubble) nozzle to cause cavitation, and GPa (gigapascal) class impact force when bubbles collapse near the workpiece produces a peening effect. 


Watch to learn about what happens under the surface inside the CWJP system. 

illustration of cavitation water jet peening

Increased fatigue strength:
Applying compressive stress to a depth of about 1mm from the surface.

Longer life:
Improves fatigue strength and life.

Clean processing method:
Shotless processing method using only water, no cleaning process required.


Strength and long life:
Increased fatigue strength of steel and aluminum alloys

Prevention of stress corrosion cracking:
Welded parts of structures

Removal of undissolved surface, surface finish:
Post processing for additive manufacturing part

Cavity Bubble: Birth → Growth → Collapse
Illustration of shotless water peening

Improved Fatigue Strength

Compressive stress can be applied to a depth of nearly 1 mm from the surface layer.
Chart that shows improved fatigue strength

Long Life

Fatigue life and fatigue strength can be improved.
Chart that shows fatigue life increase

A clean processing method

  Shotless processing method
  Uses only water
  No cleaning process required

Process Comparison

Sugino Harnesses the Power of Water

We have a long history of utilizing water to cut, to deburr, to clean, to atomize, and now to peen metals. We started working with water nearly 60 years ago - and have become masters at using renewable natural resources and incorporating sustainability - to affect industry and manufacturing.

Testing gets you the answers you need about our technology.

Testing is available at our Technology Center to help you learn if Cavitation Water Jet Peening fits your needs.