Accession Number : AD0694747

Title :   PROBLEMS ARISING FROM THE THEORY OF HEAT-RESISTANCE ALLOYS,

Corporate Author : FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO

Personal Author(s) : Koznilov,I. I.

Report Date : 04 FEB 1969

Pagination or Media Count : 19

Abstract : The article considers the solubility and dispersion mechanisms for strengthening refractory metals. The main aim of the article is a consideration of the possibility of creating new heat resistant alloys based on the refractory metals, in particular the 'big four', columbium, tantalum, molybdenum, and tungsten. A table presents calculated critical temperatures for the above metals. On the basis of the experimental data presented, the following factors must be considered in the application of solution and dispersion effects in the strengthening of alloys: (1) Use should be made of the great tendency of the transition metals, including the 'big four', toward the formation of a wide range of solid solutions. For alloys of this kind, the basic systems are tungsten-tantalum-molybdenum-columbium and tungsten-molybdenum-columbium-vanadium. (2) Using the ability of these metals to combine with light metals and metalloids (aluminum, beryllium, boron, carbon, silicon, nitrogen) to form limited solid solutions and high melting compounds (aluminides, beryllides, borides, carbides, silicides, nitrides), these metals should be used for alloying multicomponent alloys.

Descriptors :   (*REFRACTORY METAL ALLOYS, PHASE STUDIES), NIOBIUM ALLOYS, TANTALUM ALLOYS, MOLYBDENUM ALLOYS, TUNGSTEN ALLOYS, SOLUBILITY, DISPERSION HARDENING, REFRACTORY METALS, SOLID SOLUTIONS

Subject Categories : Properties of Metals and Alloys

Distribution Statement : APPROVED FOR PUBLIC RELEASE