Accession Number:

AD0257672

Title:

FORMATION AND MOTION OF DISLOCATIONS IN NICKEL AND IN NI-CR ALLOY

Descriptive Note:

Corporate Author:

FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO

Personal Author(s):

Report Date:

1960-11-01

Pagination or Media Count:

1.0

Abstract:

The results of experimental research into the process of formation and the motion of dislocations in Ni-Cr alloy are presented. The research was conducted by a method which permits direct study of the motion of dislocations by utilizing the effects caused by them. This method is based upon the assumption that during the elimination and formation of each dislocation, the lattice undergoes a shear strain equal in magnitude to the Burgers vector, and with a change in dislocation densities it is equal to the magnitude of the total of the Burgers vectors of the eliminated or formed dislocations. The secondary plastic effect during the hardening was also considered for Ni mark Ni000 and Ni-Cr alloy with the chemical composition 85.35 Ni, 14.43 Cr, 0.020 Si, 0.020 C, and Mn-traces. Samples of a corresponding form prepared from these metals were first annealed in a vacuum to relieve residual stresses. Author

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Distribution Statement:

APPROVED FOR PUBLIC RELEASE