Accession Number : AD0622893

Title :   STUDY ON THE RELAXATION OF DISLOCATIONS IN F. C. C. METALS,

Descriptive Note : Inaugural Dissertation,

Corporate Author : UPPSALA UNIV (SWEDEN) DEPT OF PHYSICS

Personal Author(s) : Mongy,Mervana

Report Date : 1965

Pagination or Media Count : 8

Abstract : The effect of orientation of single crystals on the shape and position of the internal friction peak was investigated. Single crystals of four face centered cubic metals, aluminum, copper, silver, and gold, were measured in the /100/, /110/, and /111/ directions. Minimum values were obtained in the /111/ direction for aluminum, copper, and gold, and in the /100/ direction for silver. A high degree of anisotropy in the values of the activation energy and the relaxation frequency was observed in all the metals. The values of the activation energy and relaxation frequency in polycrystalline samples represent a mean value of those measured in the three principal directions of the single crystals. (Author)

Descriptors :   (*METALS, CRYSTAL DEFECTS), (*CRYSTAL DEFECTS, RELAXATION TIME), SINGLE CRYSTALS, ALUMINUM, COPPER, SILVER, GOLD, INTERNAL FRICTION, ANISOTROPY, HEAT OF ACTIVATION

Distribution Statement : APPROVED FOR PUBLIC RELEASE