Mobility of Fast-Moving Second-Order Pyramidal Dislocations in Zinc at 77 deg K and 296 deg K

Abstract

Slip bands were produced by compression stress pulses at 77 deg K and 296 deg K and observed by X-ray reflection topography. Viscous behavior of edge, screw, and mixed dislocations was observed at velocities in the range 1000 cm/ sec to about 80,000 cm/sec. The drag coefficient for second-order pyramidal dislocations was calculated from the measurements. The results indicate that phonon drag limits the dislocation velocity in these experiments.

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Document Details

Document Type
Technical Report
Publication Date
Apr 01, 1974
Accession Number
AD0779885

Entities

People

  • Kenneth M. Jassby
  • Thad

Organizations

  • California Institute of Technology

Tags

DTIC Thesaurus Topics

  • Coefficients
  • Compression
  • Crystal Defects
  • Crystal Growth
  • Crystal Lattice Vibrations
  • Crystal Lattices
  • Crystals
  • Dislocations
  • Engineering
  • Geography
  • Military Research
  • Mobility
  • Phonons
  • Reflection
  • Shear Stresses
  • Stresses
  • X Rays

Fields of Study

  • Physics

Readers

  • Fluid Dynamics.
  • Materials Science and Engineering.
  • Thermal Physics or Thermal Science.