Understanding the roles of the strategic element cobalt in nickel base superalloys

Technical Report · Sun Apr 01 04:00:00 EST 1984

OSTI ID:6070849

Stephens, J B; Dreshfield, R L

Research progress in understanding the effects of cobalt and some possible substitute on microstructure, mechanical properties, and environmental resistance of turbine alloys is discussed. The United States imports over 90 percent of its cobalt, chromium, tantalum and columbium, all key elements in high temperature nickel base superalloys for aircraft gas turbine disks and airfoils. NASA, through joint government/industry/university teams, undertook a long range research program aimed at reducing or eliminating these strategic elements by examining their basic roles in superalloys and identifying viable substitutes.

• Research Organization: National Aeronautics and Space Administration, Cleveland, OH (USA). Lewis Research Center
• OSTI ID: 6070849
• Report Number(s): N-84-33471
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330103* -- Internal Combustion Engines-- Turbine
36 MATERIALS SCIENCE
360100 -- Metals & Alloys
AIRFOILS
ALLOYS
CHROMIUM ALLOYS
COBALT ALLOYS
CRYSTAL STRUCTURE
ENGINES
GAS TURBINE ENGINES
HEAT ENGINES
HEAT RESISTANT MATERIALS
HEAT RESISTING ALLOYS
INTERNAL COMBUSTION ENGINES
MATERIALS
MECHANICAL PROPERTIES
MICROSTRUCTURE
NICKEL ALLOYS
NICKEL BASE ALLOYS
RESEARCH PROGRAMS