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Materials

Nanocrystallization

Surface Nanocrystallization of Metals by Ultrasonic Peening

Computerized Complex for Ultrasonic Peening of Materials, Parts & Welded ElementsApplication of Ultrasonic Peening

A number of research projects were completed to optimize the UP process and to find the efficiency of UP for different applications such as the:
  • Increasing of the Fatigue Life of parts & welded elements
  • Eliminating of distortions caused by welding & other technological processes
  • Residual Stress-Relieving
  • Improving of the Dimension Stability
  • Surface Nanocrystallization
Welded Specimens after Fatigue testing
Fatigue Curves of Non-Load Carying Fillet Welded Joint


1. In as-Weld Condition

2 & 3. After application of the UP by using technology #1 & #2

Surface Nanocrystallization by UP
Microstructure of Subsurface Layer
Variation of hardness with distance from treated surface in stainless steel after UP Variation of the grain size with the depth of the treated surface

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