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Pitting and Incubation Period

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Advanced Experimental and Numerical Techniques for Cavitation Erosion Prediction

Part of the book series: Fluid Mechanics and Its Applications ((FMIA,volume 106))

Abstract

This chapter is devoted to the initial stage of cavitation erosion known as the incubation period. During this period, failure and material removal are negligible and the damage consists in isolated pits that result from plastic deformation for metallic samples. Typical distributions of pits with respect to their diameter are presented and the effects of various parameters such as flow velocity and material properties are discussed. The characteristic time of the erosion process is defined as the time needed for the pits to fully cover the eroded area without any overlap, and the characteristic pit size is defined as the size of those pits whose contribution to the covered surface is the largest. A new technique for estimating impulsive pressures from pitting tests is suggested. It is based on the similarity between a cavitation erosion pit and a conventional spherical nanoindentation imprint. This technique allows for the determination of the load spectrum in a wide range of pressure amplitudes by combining pitting tests on different materials of various cavitation resistances. The impulsive load associated with a pit can be deduced and correlated with pit volume.

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Author information

Authors and Affiliations

  1. LEGI, Grenoble, France

    Jean-Pierre Franc

  2. DYNAFLOW, INC., 10621-J Iron Bridge Road, Jessup, MD, USA

    Georges L. Chahine

  3. EPFL, Lausanne, Switzerland

    Ayat Karimi

Authors
  1. Jean-Pierre Franc
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  2. Georges L. Chahine
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  3. Ayat Karimi
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Corresponding authors

Correspondence to Jean-Pierre Franc , Georges L. Chahine or Ayat Karimi .

Editor information

Editors and Affiliations

  1. Office of Naval Research, Arlington, Virginia, USA

    Ki-Han Kim

  2. DYNAFLOW, Inc., Jessup, Maryland, USA

    Georges Chahine

  3. Laboratoire des Ecoulements Géophysiques et Industriels (LEGI), Grenoble, France

    Jean-Pierre Franc

  4. Swiss Federal Institute of Technology (EPFL), Lausanne, Switzerland

    Ayat Karimi

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Franc, JP., Chahine, G.L., Karimi, A. (2014). Pitting and Incubation Period . In: Kim, KH., Chahine, G., Franc, JP., Karimi, A. (eds) Advanced Experimental and Numerical Techniques for Cavitation Erosion Prediction. Fluid Mechanics and Its Applications, vol 106. Springer, Dordrecht. https://doi.org/10.1007/978-94-017-8539-6_3

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  • DOI: https://doi.org/10.1007/978-94-017-8539-6_3

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  • Publisher Name: Springer, Dordrecht

  • Print ISBN: 978-94-017-8538-9

  • Online ISBN: 978-94-017-8539-6

  • eBook Packages: Physics and AstronomyPhysics and Astronomy (R0)

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