Grain Boundary Contrast in Field Ion Microscope Images.

Abstract

The contrast in field ion microscopy images due to (110) symmetric tilt boundaries in a bcc lattice was systematically investigated for misorientations up to 26 degrees by computer image simulation. In low-angel grain boundaries, there are three contrast effects: dislocation spirals, cusps in plane edges, and zone-line displacement. The way in which those contrast effects develop with increasing tilt angle is discussed and illustrated with image simulations. An important result is that under favorable conditions, contrast due to the boundary dislocations could still be resolved in the simulation of the high-angle 26 degree boundary. (Author)

Document Details

Document Type
Technical Report
Publication Date
Aug 01, 1971
Accession Number
AD0734839

Entities

People

  • George H. Bishop Jr.
  • Robert D. French

Organizations

  • United States Army Research Laboratory

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Boundaries
  • Computers
  • Contrast
  • Crystal Structure
  • Dislocations
  • Displacement
  • Field Ion Microscopy
  • Grain Boundaries
  • High Angles
  • Microscopes
  • Microscopy
  • Simulations
  • Simulators

Fields of Study

  • Physics

Readers

  • Image Processing and Computer Vision.
  • Materials Science and Engineering.