MECHANICAL PROPERTIES OF EVAPORATED GOLD FILMS,

Abstract

Tensile tests were performed on gold films, of thickness in the range 2,000 Angstroms - 50,000 Angstroms, deposited on rock salt substrates at temperatures from 40 C to 200 C, having grain sizes varying from about 200 Angstrom to 'single' crystal. The grain size was found to have little influence on the early stages of the stressstrain curve, which is characterized by a very high work hardening rate and small uniform strain before fracture. The extent of plastic deformation is greater in single crystal films than in those with a small crystal size. The results are discussed in terms of dislocation. It is shown that surface defects in the film may exert an important influence on the strength of the films, which is less than would be expected for the grain films, and may account for the large amount of scatter in the results. (Author)

Document Details

Document Type
Technical Report
Publication Date
Sep 20, 1963
Accession Number
AD0426075

Entities

People

  • J. M. Blakely

Organizations

  • Harvard University

Tags

DTIC Thesaurus Topics

  • Crystals
  • Dislocations
  • Grain Size
  • Hardening
  • Mechanical Properties
  • Physical Properties
  • Plastic Deformation
  • Single Crystals
  • Substrates
  • Thickness

Readers

  • Materials Science and Engineering.
  • Structural Health Monitoring of Composite Structures.
  • Surface Engineering/Surface Coating Technology.