Fretting Fatigue Behavior of Shot-Peened Titanium Alloy TI-6AL-4V Under Seawater Conditions

Abstract

The fretting fatigue behavior of the shot-peened titanium alloy, Ti-6Al-4V, was investigated under a corrosive environment of synthetic seawater. Fretting fatigue tests were performed over a wide stress range to determine the effect of seawater at high and low cycle fatigue regimes. The results from this study showed: (1) seawater significantly reduces the fretting fatigue life of shot-peened Ti-6Al-4V at both high and low cycle fatigue relative to its counterpart in ambient laboratory conditions, (2) shot peening increases the fretting fatigue life of Ti-6Al-4V when tested under dry and seawater conditions relative to its counterpart of unpeened Ti-6Al-4V, (3) surface debris from samples tested under seawater conditions contained large quantities of oxide and seawater contaminants, (4) cleaning after testing removed most of the oxide and seawater contaminants from the sample.

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Document Details

Document Type
Technical Report
Publication Date
Jun 01, 2004
Accession Number
ADA426654

Entities

Organizations

  • Air Force Institute of Technology

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies
  • Ground and Sea Platforms

DTIC Thesaurus Topics

  • Air Force
  • Aircraft Equipment
  • Aircrafts
  • Alloys
  • Electron Microscopes
  • Environment
  • Fatigue Life
  • Fatigue Tests (Mechanics)
  • Materials
  • Mechanical Properties
  • Mechanical Working
  • Scanning Electron Microscopes
  • Shot Peening
  • Surface Finishing
  • Titanium
  • Titanium Alloys
  • Turbines

Fields of Study

  • Materials science

Readers

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