Accession Number:

AD0261377

Title:

FAST MOVING EDGE DISLOCATIONS ON THE (111) PLANE IN ANISOTROPIC FACE-CENTERED-CUBIC CRYSTALS

Descriptive Note:

Corporate Author:

NORTHWESTERN UNIV EVANSTON ILL TECHNOLOGICAL INST

Personal Author(s):

Report Date:

1961-07-01

Pagination or Media Count:

1.0

Abstract:

The elastic displacement field around a uniformly moving edg dislocation ha been obtained for the case where the dislocation glides on a 111 plane in a 110 direction in an anisotropic facecentered-cubic crys l N EQUATION IS OBTAINED FOR THE VELOCITY the Rayleigh wave velocity at which the shear stress on the slip plane of a moving dislocation is zero. Dislocations of like sign moving at velocities faster than this v locity attrac r her t a rep l ch o r. it is concluded that when ani otropy is small and the elastic constant c11 is smaller than c122c44 the more commonly occurring relationship between the elastic constants the Rayleigh wave velocity is increased above its value in i o ropic crystal and herefore the extent of the velocity regio here i loc ions ex ibit an anomalous behavior is decreased. For slightly nisotropic crystals the limiting velocity of dislocation motion i the slower of the two s ear velocities in the 110 direction Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE