THE OPERATION OF BRITTLE FRACTURE MECHANISMS IN DUCTILE METAL COMPOSITES.

Abstract

Experiments with W-Fe-Ni and Fe-Ag composites are described. The former consists of continuously bonded rounded tungsten grains in a FCC solid solution matrix of W-Fe-Ni, while the latter consists of a regular grain structure with silver dispersed in the grain boundaries and through the grains. Griffith cracks, concentrated slip, and the effects of twin intersection in these composites are described. It is concluded that the softer matrix phase provides a chechanism whereby the stress concentrations in the harder phase are relieved, thus leading to ductile behavior of the composite. (Author)

Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1965
Accession Number
AD0638621

Entities

People

  • John P. Kershaw
  • Lawrence A. Shepard

Organizations

  • Massachusetts Institute of Technology

Tags

DTIC Thesaurus Topics

  • Boundaries
  • Composite Materials
  • Crystal Structure
  • Grain Boundaries
  • Metal Matrix Composites
  • Metals
  • Solid Solutions
  • Stress Concentration
  • Stresses
  • Tungsten

Readers

  • Fire Suppression Systems Design.
  • Materials Science (Mechanical Engineering).
  • Reinforced Composite Materials