Fatigue Behavior of Silicon Carbide Whisker/Aluminum Composite

Abstract

Specimens of an extruded 19.8 vol % SiCw/2124 aluminum alloy composite were subjected to constant amplitude loading of stress ratio 0.1 at room temperature in a laboratory atmosphere. The fatigue crack growth path is tortuous and much of it is nearly parallel to the extrusion direction of the specimen. This is attributable to the SiCw aligned in the extrusion direction. The logarithm of fatigue fracture life, NF, increases linearly with decreasing stress range, within the limits of the applied stress range. The observed fractographic features are facets and steps in the initial stage, striations in the subsequent stage, and dimples in the final stage of fatigue. (JES)

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Document Details

Document Type
Technical Report
Publication Date
Oct 01, 1988
Accession Number
ADA213094

Entities

People

  • Eun E. Lee

Organizations

  • Naval Air Warfare Center Warminster

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Air Force
  • Aircrafts
  • Aluminum
  • Aluminum Alloys
  • Ceramic Materials
  • Composite Material Fabrication
  • Composite Materials
  • Compound Semiconductors
  • Electron Microscopes
  • Extrusion
  • Failure Mode And Effect Analysis
  • Fatigue Tests (Mechanics)
  • Materials
  • Naval Air Stations
  • Silicon Carbide
  • Tensile Strength
  • Vehicles

Fields of Study

  • Materials science

Readers

  • Mechanical Engineering/Mechanics of Materials.
  • Metallurgy
  • Reinforced Composite Materials