AN ELECTRON MICROSCOPE STUDY OF CRACK SURFACES IN A TUNGSTEN ROCKET NOZZLE INSERT,

Abstract

The electron microscope was used to study the fracture surfaces of cracks in fragments of a sintered tungsten rocket nozzle insert that failed during test firing. A hitherto unreported fracture mode was found; this is termed plastic intergranular decohesion because of evidence that a large amount of plastic deformation preceded grain-boundary separation. (Author)

Document Details

Document Type
Technical Report
Publication Date
Sep 01, 1961
Accession Number
AD0428130

Entities

People

  • E. Philip Dahlberg

Organizations

  • United States Naval Research Laboratory

Tags

Communities of Interest

  • Weapons Technologies

DTIC Thesaurus Topics

  • Boundaries
  • Electron Microscopes
  • Electrons
  • Gas Turbine Nozzles
  • Grain Boundaries
  • Microscopes
  • Nozzles
  • Plastic Deformation
  • Rocket Nozzles
  • Rockets
  • Tungsten

Readers

  • Materials Science (Mechanical Engineering).
  • Rocket Propulsion.

Technology Areas

  • Microelectronics