Nickel-base superalloy

US11085103B2 · kind B2 · utility

Assignee

• ROLLS-ROYCE plc

Inventors

• Mark C. HARDY · Derby, GB
• Katerina CHRISTOFIDOU · Cambridge, GB
• Paul M Mignanelli · Biggenden, AU
• Howard James STONE · Cambridge, GB
• Nicholas G. JONES · Cambridge, GB
• Christos Argyrakis · Derby, GB

Key dates

• Filing date: May 21, 2019
• Grant date: Aug 10, 2021
• Expiry date: Oct 4, 2039

Classification

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

Abstract

A nickel-base superalloy includes essentially, by weight: 14.75 to 26.5 percent cobalt, 4.1 to 4.65 percent aluminium, 1.1 to 1.9 percent titanium, 3.85 to 6.3 percent tantalum, 1.2 to 2.55 percent niobium, up to 0.07 percent boron, up to 0.06 percent carbon, up to 14.0 percent chromium, up to 1.0 percent iron, up to 1.0 percent manganese, up to 4.2 percent molybdenum, up to 0.5 percent silicon, up to 4.9 percent tungsten, and up to 0.1 percent zirconium, the balance being nickel and incidental impurities; wherein the overall concentration in the alloy of aluminium, titanium, tantalum, and niobium is from 13 to 14 atomic percent and the atomic ratio of aluminium to titanium is from 4.625:1 to 6.333:1.