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METHODS FOR PREPARING SUPERALLOY ARTICLES AND RELATED ARTICLES

United States Patent Application

20180002793
A1
View the Complete Application at the US Patent & Trademark Office
A method for preparing an article including a nickel-based superalloy is presented. The method includes heat-treating a workpiece including a nickel-based superalloy at a temperature above a 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 gamma-prime precipitate phase having an average particle size less than 250 nanometers at a concentration of at least 10 percent by volume, and is substantially free of a gamma-double-prime phase. An article having a minimum dimension greater than 6 inches is also presented. The article includes a material that has a gamma-prime precipitate phase having an average particle size less than 250 nanometers, and is substantially free of a gamma-double-prime phase.
Detor, Andrew Joseph (Albany, NY), DiDomizio, Richard (Charlton, NY), Zhou, Ning (Clifton Park, NY)
15/ 198,514
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.