Accession Number:

ADP011823

Title:

Review of Fatigue of Coatings/Substrates

Descriptive Note:

Conference proceedings

Corporate Author:

NAVAL RESEARCH LAB WASHINGTON DC MATERIAL SCIENCE AND TECHNOLOGY DIV

Personal Author(s):

Report Date:

2000-01-01

Pagination or Media Count:

13.0

Abstract:

A review of fatigue of coatingssubstrates 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 tensioncompression 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 coatingssubstrates.

Subject Categories:

  • Coatings, Colorants and Finishes
  • Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE