Journal of Materials Science

, Volume 42, Issue 16, pp 6866–6877 | Cite as

Influence of thermal and mechanical surface modifications induced by laser shock processing on the initiation of corrosion pits in 316L stainless steel

  • Patrice PeyreEmail author
  • C. Carboni
  • P. Forget
  • G. Beranger
  • C. Lemaitre
  • D. Stuart


Pure mechanical and thermo-mechanical laser shock processing treatments have been carried out on an AISI 316L stainless steel. Surface properties, mostly mechanical and metallurgical modifications, were analysed at different scales: a local scale using the nano-indentation technique and AFM analysis, and a more macroscopic scale, using microhardness, optical microscopy and residual stress determinations. After a pure mechanical laser-peening treatment, a significant improvement in the pitting corrosion resistance (+0.1 V) was observed in 0.05 M NaCl. This improvement was attributed to the combined effects of compressive residual stresses and work-hardening, and, in turn, to a mechano-electrochemical phenomenon by which a modification of cathodic reactions occurs during electrochemical tests. For the surface treated by thermo-mechanical laser peening (combination of a surface ablation and shock waves), a tendency for decreasing resistance against pitting corrosion was shown, and attributed to the processing-specific surface texture (ablation craters), which made the material susceptible for the creation of occluded cells.


Residual Stress Compressive Residual Stress 316L Stainless Steel Tensile Residual Stress Ablation Crater 
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Copyright information

© Springer Science+Business Media, LLC 2007

Authors and Affiliations

  • Patrice Peyre
    • 1
    Email author
  • C. Carboni
    • 1
  • P. Forget
    • 2
  • G. Beranger
    • 3
  • C. Lemaitre
    • 3
  • D. Stuart
    • 1
  1. 1.GERAILP-LALP, UPR 1578 CNRSArcueilFrance
  2. 2.Cea-SaclayGif Sur YvetteFrance
  3. 3.Laboratoire ROBERVAL, UTCCompiegne CedexFrance

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