Ultrasonic Impact Treatment (UIT)

The principle of UIT
Esonix®UIT harnesses and introduces the energy of ultrasound into metallurgy through surface impulse contact.  This energy is introduced into the metal by converting the resonant / harmonic oscillations of an acoustically tuned body to mechanical impulses on a surface.  This process changes the stress profile and geometric discontinuity at the weld toe.
Click on the link if you wish to read a white paper on the Physics of Esonix UIT.
The effects of UIT
The effect of the Esonix®UIT treatment and changes in the material characteristics include the following:
  • Plastic deformation of the surface, introduction of compressive stress up to 2.5 mm in depth and relaxation of residual tensile stresses up to 15 mm in depth.
  • Formation of a white layer up to 50 microns in depth with exceptional corrosion resistance, abrasion resistance and lubricity.
  • Improved surface finish and elimination of surface defects in the treated area.
  • Fatigue life of the treated components reaches, in some cases exceeds that of the base material.
The zones of effect
Esonix®UIT has the following zones of effects on the area treated by the technology. Each of these effects can be achieved through the correct application of Esonix®UIT. In each application only those effects that are desirable are created. This is achieved through the parameter control on the Esonix Ultrasonic power supply in combination with the specified oscillating system. The control parameters enable us to get any combination of the following effects or in some cases only one of these effects.
“White Layer”
0.02 - 0.5 mm
Increase in resistance to abrasion, corrosion and surface lubricity
Plastic Deformation
1.0 - 2.5 mm
Increase in fatigue life, compensation for weld deformation, decrease in corrosion fatigue
Impulse Relaxation
3.0 - 5.0 mm
Decrease of residual stresses and strain of up to 70% of the initial state
Ultrasonic Relaxation
10 - 15 mm
Decrease of residual stresses and strain of up to 50% of the initial state
The benefits of UIT
The major technical benefits of Esonix®UIT are:
  • Relaxation of residual tensile stresses
  • Enhanced fatigue life
  • Material saving
  • Reducing distortion caused by welding
  • Increase in useful service life
  • Enhanced resistance to corrosion
  • Resistance to SCC
  • Rejuvenation of material properties
  • Elimination of weld deformation
  • Environmentally friendly

Furthermore, it provides the following benefits:

  • Easy to use
  • User friendly and safe
  • Portable applications
  • Automated applications
  • Integrated QA data recording
  • Low maintenance and power consumption