Accession Number:

AD0614054

Title:

MECHANICAL PROPERTIES OF POLYCRYSTALLINE SODIUM CHLORIDE,

Descriptive Note:

Corporate Author:

HONEYWELL RESEARCH CENTER HOPKINS MINN

Personal Author(s):

Report Date:

1965-03-01

Pagination or Media Count:

42.0

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

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE