Accession Number:

AD0779885

Title:

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

Descriptive Note:

Interim rept. 1 Oct 1972-30 Sep 1974

Corporate Author:

CALIFORNIA INST OF TECH PASADENA W M KECK LAB OF ENGINEERING MATERIALS

Personal Author(s):

Report Date:

1974-04-01

Pagination or Media Count:

9.0

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 cmsec. 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.

Subject Categories:

  • Metallurgy and Metallography
  • Solid State Physics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE