Fretting Fatigue Crack Nucleation Criterion for Ti-6Al-4V

Abstract

Fretting fatigue crack nucleation behavior in titanium alloy Ti-6A1-4V was investigated by using two contact configurations: cylinder or flat with rounded edge pad on flat substrate. Both experiments and finite element analyses were conducted. A muiltiaxial fatigue parameter involving shear stress and normal stress on the critical plane was examined about its capability to predict the number of cycles to fretting fatigue crack initiation, crack initiation location and crack orientation angle along the contact surface. Also, the effects of two factors, crack nucleation process volume and coefficient of friction, on predictions were investigated.

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Document Details

Document Type
Technical Report
Publication Date
May 01, 2003
Accession Number
ADP018921

Entities

People

  • S. Mall

Organizations

  • Air Force Research Laboratory

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Air Force
  • Air Force Research Laboratories
  • Coefficients
  • Cracks
  • Failure Mode And Effect Analysis
  • Fatigue Life
  • Fatigue Tests (Mechanics)
  • Finite Element Analysis
  • Fretting
  • Friction
  • Geometry
  • Grain Size
  • Materials
  • Nucleation
  • Orientation (Direction)
  • Shear Stresses
  • Titanium Alloys

Fields of Study

  • Materials science

Readers

  • Fluid Dynamics.
  • Structural Health Monitoring of Composite Structures.