MECHANICAL PROPERTIES OF POLYCRYSTALLINE SODIUM CHLORIDE,

Abstract

The tensile behavior of fully dense polycrystalline sodium chloride has been correlated with deformation mode at different temperatures. At low temperatures (i.e. < 150 C) there is little plasticity. Slip bands are straight and the strain discontinuity cannot be accommodated at the grain boundaries. Under these conditions brittle cleavage fracture originates from an intergranular source. Above 150 C the onset of wavy slip permits adjacent grains to conform and there is a marked increase in plasticity. Above 200 C deformation is accompanied by grain boundary sliding, polygonization and recrystallization and the specimens elongate for a truly ductile fracture. These observations are compared with recent observations on polycrystalline magnesium oxide. (Author)

Document Details

Document Type
Technical Report
Publication Date
Mar 01, 1965
Accession Number
AD0614054

Entities

People

  • R. J. Stokes

Organizations

  • Honeywell International, Inc.

Tags

DTIC Thesaurus Topics

  • Boundaries
  • Chlorides
  • Grain Boundaries
  • Low Temperature
  • Magnesium
  • Magnesium Compounds
  • Mechanical Properties
  • Observation
  • Plastic Properties
  • Polycrystals
  • Sodium
  • Sodium Compounds
  • Transition Temperature

Readers

  • Materials Science (Mechanical Engineering).
  • Powder metallurgy of Titanium alloys.