Accession Number : AD0712810

Title :   PHYSICOCHEMICAL THEORY OF HEAT RESISTANCE AND NEW HEAT-RESISTANT TITANIUM ALLOYS,

Corporate Author : FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO

Personal Author(s) : Kornilov,I. I. ; Nartova,T. T.

Report Date : 02 JUL 1970

Pagination or Media Count : 10

Abstract : In accordance with the developed physicochemical theory of heat resistance and the four basic types of equilibrium diagrams, four types of diagrams of phase vs heat resistance of titanium systems were developed. Binary titanium systems are distributed among these four types according to the character of influence of the elements on the heat resistance of titanium. The established principles of change in the heat resistance as a function of the composition and structure of binary titanium systems are valuable for research on multicomponent titanium systems and for establishing the optimal compositions for new heat-resistant titanium alloys. On the basis of these principles, in the multicomponent systems Ti-Ai-Zr-Sn, Ti-Al-Zr-Mo-Fe, Ti-Al-Zr-Sn-Mo, compositions for the new heat-resistant alloys ST-1, ST-3, ST-4, and ST-5 were established. The alloys ST-1 and ST-3 have high short-term strength up to 600 degrees, and alloys ST-4 and ST-5 - up to 800 degrees. The stress-rupture strengths at 600 degrees for 100 hours are: for ST-1 - 25.5 kgf/sq mm, for ST-3 - 16.5 kgf/sq mm, and for ST-4 - 33 kgf/sq mm. The alloy ST-5 has a stress-rupture strength for 100 hours at 700 degrees equal to 20 kgf/sq mm. (Author)

Descriptors :   (*TITANIUM ALLOYS, HEAT RESISTANT ALLOYS), THERMAL PROPERTIES, THEORY, PHASE DIAGRAMS, ALUMINUM ALLOYS, MOLYBDENUM ALLOYS, ZIRCONIUM ALLOYS, TIN ALLOYS, IRON ALLOYS, STRESSES, RUPTURE, USSR, (U)USSR

Subject Categories : Metallurgy and Metallography

Distribution Statement : APPROVED FOR PUBLIC RELEASE