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What is Shot Peening | Shot Peening is a Surface Treatment Process
- 1. Content What is Shot Peening? History and Development How It Works Key Objectives Materials Used for Shots Shot Peening Equipment Process Parameters Measurement of Peening Intensity Types of Shot Peening Applications Advantages Limitations & Considerations Advancements & Future Outlook Conclusion & Q&A
- 2. What is Shot Peening? Shot peening is a surface treatment process using small spherical media • Each shot acts like a micro hammer, inducing plastic deformation • Creates compressive stress that strengthens the material
- 3. History and Development Originated in the 1940s during WWII to reduce metal fatigue • Used in aircraft component strengthening • Expanded into automotive, nuclear, and medical fields
- 4. How It Works Shots are accelerated via air blast or wheels • Impacts deform the surface layer plastically • Results in compressive stresses that prevent crack formation
- 5. Key Objectives Improve fatigue resistance by offsetting tensile stress • Prevent cracking from stress corrosion and embrittlement • Boost durability and dimensional integrity
- 6. Materials Used for Shots Steel Shots: economical and effective • Glass Beads: used for aluminum and softer metals • Ceramic Shots: high durability for advanced needs • Cut Wire Shots: precision and consistency
- 7. Shot Peening Equipment Air Blast Systems: precision control • Centrifugal Wheel Systems: high-volume throughput • Robotic Systems: programmable for complex shapes
- 8. Process Parameters Shot Size: deeper vs. finer finishes • Velocity: higher speed means higher intensity • Coverage: ensure full surface treatment • Angle & Distance: maintain uniform stress distribution
- 9. Measurement of Peening Intensity Almen Strip Test: measures deformation caused by shots • Saturation Curve: determines ideal exposure time
- 10. Types of Shot Peening Conventional: standard media-based peening • Laser Shot Peening: media-free using lasers • Ultrasonic Peening: precise, tool-based impacts • Flapper Peening: portable and field-ready
- 11. Applications Aerospace: wings, fuselage, turbine blades • Automotive: gearboxes, crankshafts, springs • Medical: orthopedic implants and bone integration
- 12. Advantages Durability: longer-lasting components • Cost-Effective: lower maintenance and repair costs • Customization: adaptable to material and geometry
- 13. Limitations & Considerations Over-Peening: risk of surface damage • Material Limits: not ideal for soft/brittle materials • Cost: high-precision systems are expensive
- 14. Advancements & Future Outlook AI & CNC Integration: smart automated systems • Laser Peening in Composites: new material applications • Digital Twin Simulation: virtual testing before production
- 15. Conclusion & Q&A Shot peening enhances mechanical performance • Review of benefits, technologies, and applications • Invite questions and open discussion