Nickel-base superalloy systems

Patent · Tue Jan 01 04:00:00 EST 1991

OSTI ID:5198224

Chang, K M

This patent describes a substantially iron-free nickel-base alloy. It comprises (in weight percent): about 12% to 24% chromium, about 5% to 20% cobalt; and 1% to 8.5% of at least one member of the group consisting of molybdenum, tungsten and rhenium; about 2% to 23% tantalum; about 0.003% to 0.05% boron; less than about 1% iron; and the balance essentially nickel the alloy having a rupture life of at least 100 hours at a stress of 90 ksi at 1300{degrees}F. and a substantial volume fraction of gamma double prime phase.

• Assignee: General Electric Co., Schenectady, NY (USA)
• Patent Number(s): US 4981644; A
• Application Number: PPN: US 7-242741
• OSTI ID: 5198224
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360101* -- Metals & Alloys-- Preparation & Fabrication
360104 -- Metals & Alloys-- Physical Properties
ALLOYS
CHEMICAL COMPOSITION
CHROMIUM ALLOYS
COBALT ALLOYS
ELEMENTS
HEAT RESISTANT MATERIALS
HEAT RESISTING ALLOYS
MATERIALS
METALS
MOLYBDENUM
NICKEL ALLOYS
NICKEL BASE ALLOYS
PHYSICAL PROPERTIES
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENTS
TUNGSTEN