Accession Number : AD0611011

Title :   EFFECT OF LIQUID SODIUM ON RELAXATION OF STRESSES IN STEEL,

Corporate Author : FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO

Personal Author(s) : Nikitin,V. I.

Report Date : 12 FEB 1965

Pagination or Media Count : 11

Abstract : Relaxation stability of liquid sodium that is used as a heat transfer agent was studied to gain information concerning (1) selection of alloys for electric power installations and (2) the mechanism of action of liquid metals on structural alloys at high temperature. EI-583 steel (0.16% C, 16.30% Cr, 1.78% Nb, 0.88% Mo, 1.78% Si, and 0.44% Mn) was tested in a relaxation chamber following thermal treatment by normalizing from 860 degrees. The tests in sodium were made at 600 degrees with initial stresses of 16, 14, and 9 kg/sq mm. The effect of the liquid sodium on the relaxation of stresses followed this general rule: the difference in the rate of deformation (or rate of reducing stresses during relaxation) in a surface active agent and in air should be maximum at the beginning of creep (relaxation) and gradually decrease in proportion to the reduction in the role of sliding processes.

Descriptors :   (*STEEL, STRESSES), (*STRESSES, STEEL), (*SODIUM, LIQUID METALS), (*LIQUID METALS, COMPATIBILITY), CREEP, STAINLESS STEEL, HEAT OF ACTIVATION, ABSORPTION, DEFORMATION, CRYSTAL DEFECTS, USSR

Distribution Statement : APPROVED FOR PUBLIC RELEASE