Review of Fatigue of Coatings/Substrates

Abstract

A review of fatigue of coatings/substrates is presented. Fatigue damage is either local or general, depending on the range of cyclic loads. Local fatigue damage includes rolling contact fatigue (RCF), fretting fatigue, fatigue-wear and general wear. Applied loads are localized consisting of rolling contacts or sliding contacts, and the resulting damage is mostly surface related. Crack initiation, surface pitting, delamination, spalling, buckling and enhanced wear can result from local fatigue damage of coatings. General fatigue damage results when the loads are of longer range such as cyclic bending, torsion or uniaxial or biaxial tension/compression etc. The mechanics of fatigue, role of microstructure, micromechanics in terms of crack nucleation, growth and fracture are reviewed. Defects produced during processing form precursors for crack nucleation. It is shown that optimization of the processing conditions to minimize defect density is essential to enhance fatigue resistance of coatings/substrates.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 2000
Accession Number
ADP011823

Entities

People

  • K. Sadananda
  • R. L. Holtz

Organizations

  • United States Naval Research Laboratory

Tags

Communities of Interest

  • Weapons Technologies

DTIC Thesaurus Topics

  • Coatings
  • Composite Materials
  • Corrosion Resistance
  • Delamination
  • Elastic Properties
  • Failure Mode And Effect Analysis
  • Fretting
  • Grain Size
  • Materials
  • Materials Science
  • Mechanics
  • Microstructure
  • Modulus Of Elasticity
  • Nucleation
  • Residual Stress
  • Resistance
  • Wear Resistance

Fields of Study

  • Materials science

Readers

  • Structural Health Monitoring of Composite Structures.
  • Tribology (the study of the boundary interaction between sliding surfaces, lubrication, wear and friction).