Accession Number : AD0622477

Title :   EFFECT OF ALLOYING ON PHYSICO-MECHANICAL PROPERTIES OF NIOBIUM,

Corporate Author : FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO

Personal Author(s) : Tarasov,N. D. ; Ulyanov,R. A. ; Mikhailov,Ya. D.

Report Date : 30 SEP 1965

Pagination or Media Count : 15

Abstract : Conclusions: Alloying of niobium in the area of solid solutions causes a rise in strength and reduction in plasticity of the alloys at room temperature in conformity with the general rules governing the strengthening of solid solutions; the most effective strengthening effect on niobium is produced by Cr, Re, Zr and Ir, considerably differing from niobium in atomic diameters. In proportion to the increase in concentration of solid niobium solutions with tantalum, tungsten, rhenium, molybdenum and iridium, there is an increase in elasticity modulus at room and high temperatures, there is an increase in characteristic temperature and in high temperature strength, thermal expansion coefficient decreases, which is evident by the increase in forces of interatomic reaction. In niobium alloys with heterogeneous structure of physico-mechanical properties are determined by the strengthening of the solid solutions and the characteristics of the second phase. In alloys with boron, lathanum and silicon maximum strengthening is caused by boron. (Author)

Descriptors :   (*NIOBIUM ALLOYS, HIGH TEMPERATURE), SOLID SOLUTIONS, THERMAL EXPANSION, PHYSICAL PROPERTIES, MECHANICAL PROPERTIES, ELASTIC PROPERTIES, TENSILE PROPERTIES, CHROMIUM ALLOYS, RHENIUM ALLOYS, ZIRCONIUM ALLOYS, IRIDIUM ALLOYS, BORON ALLOYS, SILICON ALLOYS, TANTALUM ALLOYS, TUNGSTEN ALLOYS, MOLYBDENUM ALLOYS, LANTHANUM COMPOUNDS, USSR

Distribution Statement : APPROVED FOR PUBLIC RELEASE