Accession Number : AD0733768

Title :   Screening of a Metal Surface by Fracture Products Generated by Low Density Laser Radiation (Ekranirovanie Poverkhnosti Metalla Produktami Razrusheniya ee Potokami Izlucheniya okg Maloi Plotnosti),

Corporate Author : ARMY FOREIGN SCIENCE AND TECHNOLOGY CENTER CHARLOTTESVILLE VA

Personal Author(s) : Romanov,G. S. ; Stepanov,K. L.

Report Date : 20 OCT 1971

Pagination or Media Count : 18

Abstract : The article covers a number of questions related to the phenomenon of damage to metals by laser radiation, in particular the attentuation of radiation incident to the surface being damaged due to its absorption by the damage products, the influence of unevenness of ionization and the population of atomic levels on the absorption of radiation, as well as the conditions under which the expansion of the material from the surface is adiabatic. The entire analysis was performed with a constant radiation flux density between 1 million T. 1 billion w/sq.cm, for which the stable thermal mechanism of damage is correct, while the body surface temperature T(0) reaches 1,000-10,000 degree K. The material is assumed to fly away from the surface evenly, and counterpressure of the external medium is not considered. (Author)

Descriptors :   (*RADIATION DAMAGE, THERMAL RADIATION), COHERENT RADIATION, METALS, SURFACE PROPERTIES, ABSORPTION, USSR

Subject Categories : Metallurgy and Metallography

Distribution Statement : APPROVED FOR PUBLIC RELEASE