A New Approach to the Evaluation of the Effects of Stress State and Interfacial Properties on the Behavior of Advanced Metal Matrix Composites

Abstract

The processing/microstructure/fracture properties relationships in fiber-reinforced Mg-alloy and Al-alloy composites have been characterized using mechanical testing, fractography, and Auger spectroscopy techniques. Fatigue crack growth mechanisms have also been identified, and the crack tip strain field and crack opening displacements measured using a stereoimaging technique. Local conditions for fiber and interface fracture have been determined as a function of fiber orientation. Relevant information of fracture mechanisms and failure criteria have been used to develop a 2D fracture-mechanics-based micromechanical fatigue crack growth model. Fatigue mechanisms, Crack growth modeling, Mg-alloy composite, Ti-alloy composite, Al-alloy composite, Metal-matrix composite, Interfacial strength, Microstructure/fracture relationships.

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Document Details

Document Type
Technical Report
Publication Date
Sep 30, 1988
Accession Number
ADA201246

Entities

People

  • G. R. Leverant
  • K. S. Chan

Organizations

  • Southwest Research Institute

Tags

Communities of Interest

  • Human Systems

DTIC Thesaurus Topics

  • Alloys
  • Composite Materials
  • Crack Tips
  • Cracks
  • Engineering
  • Fiber Reinforced Composites
  • Fracture (Mechanics)
  • Magnesium Alloys
  • Materials
  • Materials Science
  • Mechanics
  • Metal Matrix Composites
  • Metals
  • Microstructure
  • Military Research
  • Scientists
  • Structural Components

Fields of Study

  • Materials science

Readers

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