Process Control Techniques for Laser Peening of Metals

  1. Prof. Dr.-Ing Lothar Wagner Chairman of ICSP8
  1. Rob Specht1,
  2. Fritz Harris1,
  3. Laurie Lane1,
  4. Dean Jones2,
  5. Lloyd Hackel3,
  6. Tania Zaleski3,
  7. John Halpin3,
  8. Mike Hill4 and
  9. Wilfried Wübbenhorst5

Published Online: 7 FEB 2006

DOI: 10.1002/3527606580.ch61

Shot Peening

Shot Peening

How to Cite

Specht, R., Harris, F., Lane, L., Jones, D., Hackel, L., Zaleski, T., Halpin, J., Hill, M. and Wübbenhorst, W. (2003) Process Control Techniques for Laser Peening of Metals, in Shot Peening (ed L. Wagner), Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim, FRG. doi: 10.1002/3527606580.ch61

Editor Information

  1. TU Clausthal, Institut für Werkstoffkunde und Werkstofftechnik, Agricolastr. 6, D-38678 Clausthal-Zellerfeld, Germany

Author Information

  1. 1

    Metal Improvement Co., Paramus, NJ, USA

  2. 2

    Rolls-Royce plc, Bristol, UK

  3. 3

    Lawrence Livermore National Laboratory (LLNL), Livermore, CA, USA

  4. 4

    UC Davis, CA, USA

  5. 5

    Metal Improvement Co., Haan-Gruiten, Germany

Publication History

  1. Published Online: 7 FEB 2006
  2. Published Print: 12 MAY 2003

ISBN Information

Print ISBN: 9783527305377

Online ISBN: 9783527606580

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Keywords:

  • laser peening of metals;
  • process control techniques

Summary

Laser Peening also known as LasershotSM and Laser ShockTM Peening, is a surface treatment which can induce compressive stresses in metals at depths exceeding 1 mm. This produces a more damage tolerant component, which resists fatigue and Stress Corrosion Cracking (SCC) failures better than components treated with conventional shot peening.

A new Laser Peening facility was brought on line in early 2002 by MIC in Livermore, CA. This facility utilizes a Lawrence Livermore National Laboratory (LLNL) designed solid state laser employing Neodymium doped laser glass slabs and phase conjugation technology to enable high energy & high laser repetition rate combined with excellent beam quality. Laser Peening process parameters have been identified which will impact on the final depth of compressive stresses in a metal component. Process control techniques widely utilized in conventional shot peening have been adapted for use in Laser Peening with good success. As a result, Suppliers and Users of Laser Peening have a reliable method of monitoring the critical process parameters in a manner that will lead to consistency of production operation and repeatability of end results.