Accession Number:

AD0261379

Title:

FAST MOVING EDGE DISLOCATIONS ON THE (110) PLANE IN ANISOTROPIC BODY-CENTERED-CUBIC CRYSTALS

Descriptive Note:

Corporate Author:

NORTHWESTERN UNIV EVANSTON ILL TECHNOLOGICAL INST

Personal Author(s):

Report Date:

1961-06-01

Pagination or Media Count:

1.0

Abstract:

The elastic displacement field around a uniformly moving edge dislocation has been obtained for the case where the dislocation glides on a 110 plane in a 111 direction in an anisotropic bodycentered-c bic crystal. A general solution is found which involves elastic displacements in all three coordinate directions. The situation where the degree of anisotropy is small is analysed in detail. An 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 velocity attract rather than repel each other. It is concluded that when anisotropy 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 an isotropic crystal and therefore the extent of the velocity region where dislocations exhibit an anomalous behavior is decreased. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE