Accession Number : AD0768468

Title :   Oxidation of OT4 and OT4-1 Alloys during Prolonged Heating in Air at Temperatures of 200-400C,

Corporate Author : FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO

Personal Author(s) : Novikova,E. N. ; Luzhnikov,L. I. ; Kononova,V. F.

Report Date : 10 OCT 1973

Pagination or Media Count : 13

Abstract : It was shown that during the process of prolonged heating in air at 200-400C the surface of OT4-1 and OT4 alloys is saturated with oxygen with the formation of a thin TiO2 oxide film on the surface and on the alfin layer (solid solution of oxygen in an alpha-titanium) under it to thickness of up to 22 micrometers. During prolonged holding (more than 2,000 h) a large portion of the oxygen is released into the diffuser in the solid solution. Diffusion of oxygen in the solid solution leads to an increased alloy microhardness.

Descriptors :   (*TITANIUM ALLOYS, *OXIDATION), HIGH TEMPERATURE, HARDNESS, TITANIUM COMPOUNDS, OXIDES, USSR

Subject Categories : Metallurgy and Metallography

Distribution Statement : APPROVED FOR PUBLIC RELEASE