Accession Number:

AD0405146

Title:

HIGH VELOCITY DISLOCATIONS

Descriptive Note:

Final rept.

Corporate Author:

NORTHWESTERN UNIV EVANSTON IL TECHNOLOGICAL INST

Personal Author(s):

Report Date:

1962-10-01

Pagination or Media Count:

78.0

Abstract:

The elastic displacement field of moving edge dislocations in anisotropic body-centered-cubic and face-centered-cubic crystals is found. From the elastic displacements the shear stress on the dislocation slip plane is determined. The anomalous velocity range in which edge dislocations of like sign attract one another has been calculated for a number of metals and ionic crystals. It is found that anisotropy does not appreciably expand the anomalous range. The problem of dislocation moving on the interface separating media of different elastic properties has been considered. The anomalous velocity range may or may not exist, depending on the values of the elastic constants in the two media. The dislocation self-energy is infact the slowest sound velocity. Supersonic dislocation behavior is qualitatively described.

Subject Categories:

  • Crystallography

Distribution Statement:

APPROVED FOR PUBLIC RELEASE