Understanding the roles of the strategic element cobalt in nickel base superalloysResearch 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.
Document ID
19840025400
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Stephens, J. B. (NASA Lewis Research Center Cleveland, OH, United States)
Dreshfield, R. L. (NASA Lewis Research Center Cleveland, OH, United States)
Date Acquired
August 12, 2013
Publication Date
April 1, 1984
Publication Information
Publication: AGARD Mater. Substitution and Recycling