Micromechanisms of Fatigue Crack Growth and Fracture Toughness in Metal Matrix Composites

Abstract

Fatigue crack rate data for large cracks in 12 variations of particulate silicon carbide SiC reinforced alloy composites have been measured. Composites with seven different matrix alloys were tested, four of which were of precipitation hardening compositions, and these were tested in both as-extruded and peak aged conditions. Five of the materials were made by casting, ingot metallurgical methods and two of the alloys by mechanical alloying, powder metallurgical methods. For both manufacturing methods, primary fabrication was followed by hot extrusion. Keywords: Metal matrix composites; Silicon carbide reinforcement; Fatigue crack growth; Fracture toughness; Particulate strengthening; Crack growth micromechanisms.

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Document Details

Document Type
Technical Report
Publication Date
Aug 01, 1988
Accession Number
ADA198694

Entities

People

  • D. L. Davidson

Organizations

  • Southwest Research Institute

Tags

Communities of Interest

  • Advanced Electronics

DTIC Thesaurus Topics

  • Aluminum Alloys
  • Ceramic Materials
  • Composite Materials
  • Dispersion Hardening
  • Fabrication
  • Manufacturing
  • Materials
  • Mechanical Properties
  • Mechanics
  • Metal Matrix Composites
  • Metals
  • Particle Size
  • Particles
  • Powders
  • Silicon Carbide
  • Stress Intensity Factors
  • United States

Fields of Study

  • Materials science

Readers

  • Materials Science (Mechanical Engineering).
  • Metallurgy
  • Reinforced Composite Materials