Nickel-based superalloys and articles

US8226886B2 · kind B2 · utility

Assignee

• General Electric Company · US

Inventors

• Timothy Hanlon · Glenmont, US
• Richard DiDomizio · Scotia, US
• Michael F. Henry · Niskayuna, US
• Akane Suzuki · Ballston Spa, US
• Arthur Samuel Peck · Greenville, US
• Stephen Joseph Balsone · Simpsonville, US

Key dates

• Filing date: Aug 31, 2009
• Grant date: Jul 24, 2012
• Expiry date: May 29, 2030

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C22F1/10
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

Nickel based alloys are provided comprising from about 7.0 weight percent (wt %) to about 12.0 wt % chromium, from about 0.1 wt % to about 5 wt % molybdenum, from about 0.2 wt % to about 4.5 wt % titanium, from about 4 wt % to about 6 wt % aluminum, from about 3 wt % to about 4.9 wt % cobalt, from about 6.0 wt % to about 9.0 wt % tungsten, from about 4.0 wt % to about 6.5 wt % tantalum, from about 0.05 wt % to about 0.6 wt % hafnium, up to about 1.0 wt % niobium, up to about 0.02 wt % boron, and up to about 0.1 wt % carbon, with the remainder being nickel and incidental impurities. The alloys may be cast, directionally solidified and heat treated to provide articles having a gamma prime fraction of greater than about 50%.