1
David N Duhl, Alan D Cetel: Advanced high strength single crystal superalloy compositions. United Technologies Corporation, Charles E Sohl, January 12, 1988: US04719080 (85 worldwide citation)

A superalloy composition and single crystal articles of the composition are described. The broad range is 3-12% Cr, 0-3% Mo, 3-10% W, 0-5% Re, 6-12% Ta, 4-7% Al, 0-15% Co, 0-0.045% C, 0-0.02% B, 0-0.1% Zr, 0-0.8% Hf, 0-2% Nb, 0-1% V, 0-0.7% Ti, 0-10% (Ru+Rh+Pd+Os+Ir+Pt), balance essentially Ni. An e ...


2
David N Duhl, Alan D Cetel: Superalloy single crystal articles. United Technologies Corporation, Charles E Sohl, September 6, 1983: US04402772 (20 worldwide citation)

A specific composition range and process sequence are described for the production of single crystal superalloy articles which have an exceptional combination of high temperature mechanical properties and resistance to oxidation and hot corrosion. The nominal composition is 6% Ta, 9% Cr, 5% Co, 1% T ...


3
Alan D Cetel, David N Duhl: Columnar grain superalloy articles. United Technologies Corporation, Charles E Sohl, November 26, 1991: US05068084 (13 worldwide citation)

An article exhibiting superior mechical properties and resistance to oxidation corrosion at elevated temperatures as described. The article has particular utility in gas turbine engines and is comprised of a nickel base superalloy consisting essentially of 3-10% Cr, 12.1-16% Co, 1.0-1.9% Mo, 3-10% W ...


4
Alan D Cetel, David N Duhl: Advanced high strength, highly oxidation resistant single crystal superalloy compositions having low chromium content. United Technologies Corporation, John E Whitman Breed Abbott & Morgan Boyd Esq, December 28, 1999: US06007645 (11 worldwide citation)

A superalloy composition and single crystal articles of the composition are disclosed. The broad range, in weight percent, is 3.0-20.0% Co, 5.0-10.0% W, 5.0-7.0% Al, 0.4-2.9% Cr, 4.0-8.0% Ta, 0-1.0% V, 0-8.5% Re, 0-1.5% Ti, 0-3.0% Hf, 0-4.0% Mo, 0-2.0% Nb, 0-10.0% of one or more elements selected fr ...


5
Kirk C Newton, Alan D Cetel, Mario P Bochiechio, James T Beals, John Joseph Marcin: Casting system for investment casting process. United Technologies Corporation, Carlson Gaskey & Olds, November 3, 2015: US09174271 (10 worldwide citation)

A casting system includes a core and a shell positioned relative to the core. A barrier coating is applied on at least one of the core and the shell, and may be applied to both the core and the shell. The barrier coating limits reaction between the casting system and a casting alloy.


6
David N Duhl, Alan D Cetel: Stable heat treatable nickel superalloy single crystal articles and compositions. United Technologies Corporation, Charles E Sohl, April 25, 2000: US06054096 (10 worldwide citation)

Improved compositions for fabricating nickel superalloy single crystal articles are described. The compositions are characterized by the substantial absence of carbon, boron, zirconium and vanadium and intentional additions of cobalt. The cobalt additions increase the stability of the compositions a ...


7
Dilip M Shah, Alan D Cetel, Alan W Stoner, William P Allen: United Technologies Corporation, Carlson Gaskey & Olds, March 4, 2008: US07338259 (9 worldwide citation)

A high modulus component, such as an aircraft engine turbine blade, is formed from a base metal that has a high modulus crystallographic orientation that is aligned with the primary, i.e. radial, direction of the turbine blade. The base metal is Ni, Fe, Ti, Co, Al, Nb, or Mo based alloy. Alignment o ...


8
Dilip M Shah, Alan D Cetel, Alan W Stoner, William P Allen: United Technologies Corporation, Carlson Gaskey & Olds, January 18, 2011: US07871247 (8 worldwide citation)

A high modulus component, such as an aircraft engine turbine blade, is formed from a base metal that has a high modulus crystallographic orientation that is aligned with the primary, i.e. radial, direction of the turbine blade. The base metal is Ni, Fe, Ti, Co, Al, Nb, or Mo based alloy. Alignment o ...


9
Raymond P Ristau, Sudhangshu Bose, Alan D Cetel: Surface preparation process for deposition of ceramic coating. United Technologies Corporation, October 19, 2004: US06805750 (8 worldwide citation)

A method of surface cleaning and controlled oxidation of superalloys is described. The method provides a thin homogeneous layer of relatively pure alpha alumina which is suited to receive and adhere to a subsequent vapor deposited coating.


10
Sudhangshu Bose, Alan D Cetel, Peter J Draghi, Norman Pietruska: Method for repairing turbine engine components. United Technologies Corporation, Bachman & LaPointe P C, April 27, 2004: US06725540 (7 worldwide citation)

The present invention relates to a method for repairing turbine engine components, such as vanes and blades, which have airfoils. The method broadly comprises removing oxidation debris from portions of the component by blending areas exhibiting thermal barrier coating spall and/or oxidation damage, ...