Superalloys and components formed thereof

US9518310B2 · kind B2 · utility

Assignee

• General Electric Company · US

Inventors

• David Paul Mourer · Danvers, US
• Richard DiDomizio · Scotia, US
• Timothy Hanlon · Glenmont, US
• Daniel Yeuching Wei · Reading, US
• Andrew Ezekiel Wessman · Walton, US
• Kenneth Rees Bain · Loveland, US
• Andrew Martin Powell · Cincinnati, US

Key dates

• Filing date: Jul 23, 2013
• Grant date: Dec 13, 2016
• Expiry date: Sep 19, 2034

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B22F2998/00
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A gamma prime nickel-base superalloy and components formed therefrom that exhibit improved high-temperature dwell capabilities, including creep and hold time fatigue crack growth behavior. A particular example of a component is a powder metallurgy turbine disk of a gas turbine engine. The gamma-prime nickel-base superalloy contains, by weight: 16.0 to 30.0% cobalt; 9.5 to 12.5% chromium; 4.0 to 6.0% tantalum; 2.0 to 4.0% aluminum; 2.0 to 3.4% titanium; 3.0 to 6.0% tungsten; 1.0 to 4.0% molybdenum; 1.5 to 3.5% niobium; up to 1.0% hafnium; 0.02 to 0.20% carbon; 0.01 to 0.05% boron; 0.02 to 0.10% zirconium; the balance essentially nickel and impurities. The superalloy has a W+Nb−Cr value of at least −6, is free of observable amounts of sigma and eta phases, and exhibits a time to 0.2% creep at 1300° F. and 100 ksi of at least 1000 hours.