Accession Number : AD0662211

Title :   DISTORTION OF THE CRYSTALLINE STRUCTURE AND DENSITY OF THE DISLOCATIONS IN MOLYBDENUM IN VARIOUS STAGES OF REFINEMENT AFTER FILING,

Corporate Author : FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO

Personal Author(s) : Savitskii,E. M. ; Babareko,A. A. ; T'ao,Tsu-ts'ung

Report Date : 26 MAY 1967

Pagination or Media Count : 13

Abstract : The results of the computation of n and rho are presented. The mean-statistical number of dislocations n in the accumulation in industrial molybdenum amounts n = 4.7, for the alloy Mo+0.1% La, it is equal to n = 2.7, whereas for the refined molybdenum n = 1. Such an order of change in the value of n in the different specimens of molybdenum fully agrees with the change in its purity and plasticity. The lower the purity and plasticity of the molybdenum, the greater the number of dislocations in the accumulation will be. The density of the dislocations in all the cases lies within the limits 10 to the 11th power - 10 to the 12th power/sq cm, which corresponds with its typical value for metals in the cold-hardened state. The greater density of the dislocations in the refined molybdenum as compared with industrial molybdenum as compared with industrial molybdenum and the alloy Mo+0.1% La is brought about by the greater plastic deformations in the filing. A comparative evaluation of the levels rho sub delta a/a and rho sub D enables one to draw an unambigous conclusion relative to the different character of the interaction and distribution of the dislocations in molybdenum of different purity.

Descriptors :   (*MOLYBDENUM, DISLOCATIONS), (*MOLYBDENUM ALLOYS, DISLOCATIONS), LANTHANUM, METALLURGY, USSR

Subject Categories : Metallurgy and Metallography
      Crystallography

Distribution Statement : APPROVED FOR PUBLIC RELEASE