A Study of Stress Distribution in Layered and Gradient Tribological Coatings (Preprint)

Abstract

A numerical model was used to determine the stress distribution in layered and gradient coatings. A parametric study was performed to investigate the effect of various critical parameters such as thickness, composition, applied load, material properties, and interfacial friction on the stress distribution in the layered and gradient coatings and the 440C steel substrate. Layered and gradient Ti/TiC coatings consisted of a titanium bond layer and titanium carbide (TiC) gradient layers. The Ti sub (1-x) C sub x gradient coatings (0< or =x< or =1) were assumed as a series of perfectly bonded layers with unique material properties and layer thickness. The importance of the material, geometrical and mechanical effects on the magnitude and location of peak stresses were investigated. The results of this study can be used to optimize layered and gradient coating composition and thickness for the best tribological performance at specified contact loading conditions.

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Document Details

Document Type
Technical Report
Publication Date
Nov 01, 2006
Accession Number
ADA465564

Entities

People

  • Andrey A. Voevodin
  • Jeffrey H. Sanders
  • Shashi K. Sharma
  • Young Sup Kang

Organizations

  • Universal Technology Corporation (United States)

Tags

DTIC Thesaurus Topics

  • Air Force
  • Air Force Research Laboratories
  • Coatings
  • Elastic Properties
  • Elements
  • Failure Mode And Effect Analysis
  • Films
  • Finite Element Analysis
  • Friction
  • Materials
  • Mechanical Properties
  • Modulus Of Elasticity
  • Plastic Properties
  • Pressure Distribution
  • Stress Strain Relations
  • Stresses
  • Substrates

Fields of Study

  • Materials science

Readers

  • Mechanical Engineering/Mechanics of Materials.
  • Powder metallurgy of Titanium alloys.
  • Surface Coatings Technology.