Accession Number:

AD0610434

Title:

RESEARCH IN THE GENERAL FIELD OF SUBSTRUCTURE AND DISLOCATION NETWORKS IN METALLIC CRYSTALS.

Descriptive Note:

Final rept. for 1 Apr 60-30 Apr 62,

Corporate Author:

FRANKLIN INST PHILADELPHIA PA LABS FOR RESEARCH AND DEVELOPMENT

Personal Author(s):

• Damiano,V. V.
• Tint,G. S.
• Herman,M.

Report Date:

1962-04-30

Pagination or Media Count:

48.0

Abstract:

The three dimensional aspects of dislocation substructures were studied in cadmium doped zinc crystals grown from the melt. Precipitates delineating the dis locations were revealed by etching a surface closely parallel to the slip plane. Using a technique of continuous etching and cinephotomicrography, the course of the dislocations was followed through the crystal. Tangles of dislocations were observed in deformed crystals. After annealing a rearrangement of dislocations into low-angle and hexagonal networks was evidenced. Closed loops and spiral dislocations were found to be associated with large inclusions. A mechanism for the multiplication of dislocations at inclusions was proposed. Dislocation reactions accounting for the observed substructures have been proposed. Author

Descriptors:

• (*METAL CRYSTALS
• CRYSTAL STRUCTURE)
• (*CRYSTAL STRUCTURE
• METAL CRYSTALS)
• CRYSTAL SUBSTRUCTURE
• CRYSTAL DEFECTS
• CRYSTALS
• ZINC
• IMPURITIES
• CADMIUM
• CHEMICAL MILLING
• PHOTOMICROGRAPHY
• CRYSTALLOGRAPHY

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE