United Technologies Corporation

Raytheon Technologies Corporation

Carl E Kelly

Gabriel L Suciu

John Joseph Marcin

Dilip M Shah

Herbert A Chin

Paul D Genereux

Paul L Reynolds

Robert P Schaefer

David R Malley

High modulus turbine shafts and high modulus cylindrical articles are described as are the process parameters for producing these shafts and cylindrical articles. The shafts/articles have a high Young's modulus as a result of having high modulus &#x3c;111&#x3e; crystal texture along the longitudinal axis of the shaft/article. The shafts are produced from directionally solidified seeded &#x3c;111&#x3e; single crystal cylinders that are axisymmetrically hot worked before a limited recrystallization process is carried out at a temperature below the recrystallization temperature of the alloy. The disclosed process produces an intense singular &#x3c;111&#x3e; texture and results in shaft or cylindrical article with a Young's modulus that is at least 40% greater than that of conventional nickel or iron alloys or conventional steels.

High elastic modulus shafts and method of manufacture

Systems and methods for repairing Thermo-Span&#xae; gas turbine engine components are described herein. Embodiments of these methods minimize post-weld residual stresses in a weld repaired Thermo-Span&#xae; component by solution heat treating the component by heating the component to about 2000&#xb0; F.&#xb1;25&#xb0; F., holding the component at about 2000&#xb0; F.&#xb1;25&#xb0; F. for about one hour; and cooling the component to below about 700&#xb0; F. at a rate equivalent to cooling in air; and precipitation heat treating the component by heating the component to about 1325&#xb0; F.&#xb1;25&#xb0; F., holding the component at about 1325&#xb0; F.&#xb1;25&#xb0; F. for about 8 hours, cooling the component to about 1150&#xb0; F.&#xb1;25&#xb0; F. at a maximum rate of about 100&#xb0; F./hour, holding the component at about 1150&#xb0; F.&#xb1;25&#xb0; F. for about 8 hours, and cooling the component at a predetermined cooling rate. Dimensions of the fully-machined and weld repaired component are maintained during solution heat treating and precipitation heat treating via custom designed furnace tools.

Methods for repairing gas turbine engine components

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Plantsville, CT, United States of America

Carl E Kelly