On the Specific Damaging Effects of Surface and Near-Surface Inclusions

  • Marc-Henri Ambroise
  • Thierry Bretheau
  • André Zaoui


The most significant results of an experimental study on the damaging effects of exogeneous ceramic inclusions in nickel-based superalloys are first reported. Attention is focused on some observations which conflict with a too-simple two-dimensional analysis of the problem. A more realistic theoretical treatment is then developed, which allows the calculation of configurational force and torque acting on a near-surface or surface inhomogeneity: the corresponding interfacial discontinuity of the elastostatic “energy—momentum” tensor is shown to be responsible for specific damaging effects of such inhomogeneities which could not be interpreted otherwise.


Fatigue Crack Tensile Axis Interfacial Cohesion Electron Beam Scanning Moire Pattern 
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Copyright information

© Springer-Verlag New York Inc. 1990

Authors and Affiliations

  • Marc-Henri Ambroise
    • 1
  • Thierry Bretheau
    • 1
  • André Zaoui
    • 1
  1. 1.Laboratoire PMTM, CNRSUniversité Paris-NordVilletaneuseFrance

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