Accession Number : AD0699119

Title :   EFFECT OF A BEAM OF LIGHT ON THE DISLOCATION STRUCTURE OF CRYSTALS,

Corporate Author : FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO

Personal Author(s) : Averyanova,T. M. ; Mirkin,L. I. ; Pilipetskii,N. F.

Report Date : 15 AUG 1969

Pagination or Media Count : 14

Abstract : This is a sequel to earlier work by the authors where it was shown that a laser beam incident on a metallic surface produces a crater, the hardness around which is several times higher than the hardness that can be obtained in the same material by any of the known mechanical or heat-treatment hardening methods. As hardness is connected with the dislocation structure, the authors have investigated the changes produced by a laser beam in the dislocation structure of high-purity NaCl, on the surface of which the emergence of the dislocations can be readily displayed. Individual experiments were also carried out on single crystals of refractory tantalum metal. A ruby laser operating in the multiple-spike node was used. The laser and the apparatus used to measure its beam intensity are described. (Author)

Descriptors :   (*METAL CRYSTALS, HARDNESS), (*SODIUM CHLORIDE, DISLOCATIONS), (*LASERS, CRATERING), LIGHT PULSES, SURFACE PROPERTIES, TANTALUM, USSR

Subject Categories : Lasers and Masers
      Crystallography

Distribution Statement : APPROVED FOR PUBLIC RELEASE