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METHODS FOR PREPARING SUPERALLOY ARTICLES AND RELATED ARTICLES

United States Patent Application

20180002794
A1
View the Complete Application at the US Patent & Trademark Office
A method for preparing an improved article including a nickel-based superalloy is presented. The method includes heat-treating a workpiece including a nickel-based superalloy at a temperature above the gamma-prime solvus temperature of the nickel-based superalloy and cooling the heat-treated workpiece with a cooling rate less than 50 degrees Fahrenheit/minute from the temperature above the gamma-prime solvus temperature of the nickel-based superalloy so as to obtain a cooled workpiece. The cooled workpiece includes a coprecipitate of a gamma-prime phase and a gamma-double-prime phase, wherein the gamma-prime phase of the coprecipitate has an average particle size less than 250 nanometers. An article having a minimum dimension greater than 6 inches is also presented. The article includes a material having a coprecipitate of a gamma-prime phase and a gamma-double-prime phase, wherein the gamma-prime phase of the coprecipitate has an average particle size less than 250 nanometers.
Detor, Andrew Joseph (Albany, NY), DiDomizio, Richard (Charlton, NY), Hanlon, Timothy (Town Glenmont, NY), Shen, Chen (Schenectady, NY), Zhou, Ning (Clifton Park, NY)
15/ 198,658
June 30, 2016
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH AND DEVELOPMENT [0001] This invention was made with Government support under contract number DE-FE0026299 awarded by the U.S. Department of Energy. The Government has certain rights in the invention.