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Microstructural Effects in Wear of Metals

  • N. P. Suh
Part of the Battelle Institute Materials Science Colloquia book series (volume 31)

Abstract

Various metallurgical factors which affect the wear of metals are considered in terms of the delamination theory of wear. In particular, those factors which control the surface traction, the deformation of the subsurface, and the subsequent crack nucleation and propagation process are discussed. The evidence for the existence of a “soft, nonworkhardening” layer due to the dislocation instability at the surface and the presence of a flow-stress gradient is reviewed. The microstructure is shown to have significant effects on the subsurface crack nucleation and propagation process, thus on the wear rate. The role of second phase particles in crack nucleation is the same both in wear and in bulk deformation. However, the effect of the particle morphology in wear differs from that on the fracture behavior under uniaxial and torsional loading conditions. The depth of the subsurface crack, thus the wear-sheet thickness, is a strong function of the frictional coefficient and the applied load. The condition for crack propagation is discussed in terms of the state of stress existing in the subsurface over which an asperity has just moved.

Keywords

Wear Rate Wear Particle Crack Nucleation Wear Process Erosive Wear 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Plenum Press, New York 1977

Authors and Affiliations

  • N. P. Suh
    • 1
  1. 1.Department of Mechanical EngineeringMassachusetts Institute of TechnologyCambridgeUSA

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