Abstract: A titanium alloy matrix fiber reinforced composite made from titanium alloy sheet processed to have ductility up to about 35%. Of particular usefulness is the composite having a Ti.sub.3 Al titanium aluminide having this level of ductility. The composites have good resistance to thermal cyclic fatigue.
Type:
Grant
Filed:
April 1, 1993
Date of Patent:
April 16, 1996
Assignee:
United Technologies Corporation
Inventors:
Gary D. Linsey, Otis X. Chen, Martin J. Blackburn
Abstract: A solution is described for the chemical processing of beta phase-containing titanium alloys. The solution contains HNO.sub.3 and HF, along with a small but effective amount of copper, ruthenium, rhodium, palladium, osmium, iridium, platinum or gold to reduce hydrogen absorption, ammonium formate and citric acid to increase the milling rate, and a surfactant to ensure a satisfactory milled surface.
Type:
Grant
Filed:
December 31, 1991
Date of Patent:
June 8, 1993
Assignee:
United Technologies Corporation
Inventors:
Henry M. Hodgens, II, Kenneth C. Long, Robert E. Fishter
Abstract: A solution is described for the chemical milling of niobium and niobium-base alloys. The solution contains about 25% HNO.sub.3, about 19% HF, balance H.sub.2 O, with additions of citric acid and ammonium formate to control the reaction rate and provide a smooth surface finish without intergranular attack, and a small amount of a noble metal to control hydrogen absorption. A process for using the solution to mill niobium alloys is also described.
Type:
Grant
Filed:
December 31, 1991
Date of Patent:
April 13, 1993
Assignee:
United Technologies Corporation
Inventors:
Robert E. Fishter, Kenneth C. Long, Henry M. Hodgens, II
Abstract: A procedure is described for the repair of gas turbine engine turbine components which involves the repair of cracks and other defects and the replacement of worn or eroded material followed by the laser melting of a thin layer of metal on the surface of the component in those areas requiring reconfiguration to return to the original dimensions. The reconfiguration by laser melting is also useful for new articles which are out of tolerance, and generally for shaping objects from metal sheet or plate.
Type:
Grant
Filed:
March 13, 1991
Date of Patent:
September 1, 1992
Assignee:
United Technologies Corporation
Inventors:
John J. Smolinski, Peter J. Draghi, John R. Danielsen
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