Oxidation of OT4 and OT4-1 Alloys during Prolonged Heating in Air at Temperatures of 200-400C,
FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO
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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.
- Metallurgy and Metallography