The Time Dependent Mechanical Behavior of Metal Matrix Composites.

Abstract

The tensile, fatigue, and creep bending behavior of unidirectional and cross-plied composites of 60 volume percent boron filaments in a matrix of 6061 aluminum was investigated. The tensile strength properties of the composites fabricated as a part of this program show that the fabrication technique of diffusion bonding foil-filament arrays produces high strength, high quality material. The major part of this report deals with measurement and analyses of fatigue properties. Fatigue behavior was investigated under both axial and flexural loading conditions, with variables of filament orientation, test temperature and A-ratio. Notch sensitivity was also investigated; fatigue of the composite was found to be insensitive to notch radius. Fatigue damage was analyzed by residual strength measurement, filament extraction, scanning electron microscopy, metallography, radiography, and other techniques. The theory that the fatigue properties are controlled by the fatigue behavior of the matrix was confirmed and reinforced by the current investigation. (Author)

Document Details

Document Type
Technical Report
Publication Date
Sep 01, 1971
Accession Number
AD0732268

Entities

People

  • George D. Menke
  • Istvan J. Toth

Tags

DTIC Thesaurus Topics

  • Advanced Materials
  • Composite Materials
  • Diffusion Bonding
  • Electron Microscopy
  • Fabrication
  • Filaments
  • Material Forming Processes
  • Materials
  • Materials Processing
  • Materials Science
  • Measurement
  • Metal Matrix Composites
  • Microscopy
  • Notch Sensitivity
  • Scanning Electron Microscopy
  • Tensile Strength

Fields of Study

  • Materials science

Readers

  • Mechanical Engineering/Mechanics of Materials.
  • Structural Health Monitoring of Composite Structures.
  • Thin Film Deposition Science.

Technology Areas

  • Microelectronics