Force-transmitting surfaces of titanium protected from pretting fatigue by a coating of Co-Ni-Fe
AssigneesUnited Technologies Corporation, The United States of America as represented by the Secretary of the Air Force
InventorsHugh M. Privett, III, Shiro Fujishiro
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Abstract
A method is disclosed for protecting a force-transmitting or force-receiving surface of titanium from fretting fatigue. The method constitutes coating the surface with a coating of an alloy of nickel, cobalt, and iron.
Claims5
A metallic structure subject to fretting, said structure comprising a substrate selected from titanium, titanium alloys, and titanium intermetallics, said substrate having an anti-fretting coating on the surface thereof, wherein the improvement comprises said coating being consisting essentially of, by weight, from about 30 to about 70% cobalt, from about 25 to about 55% nickel, and from about 5 to about 25% iron, said iron being oxidizable to hematite at elevated temperature said coating having a thickness of from 1 to about 1000 microns.
Dependencies are inferred from the claim text.