Understanding the Roles of the Strategic Element Cobalt in Nickel Base Superalloys,

Abstract

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, has undertaken a long-range research program (COSAM - Conservation of Strategic Aerospace Materials) aimed at reducing or eliminating these strategic elements by examining their basic roles in superalloys and identifying viable substitutes. This paper discusses research progress in understanding the effects of cobalt and some possible substitutes on microstructure, mechanical properties, and environmental resistance of turbine alloys. (Author)

Document Details

Document Type
Technical Report
Publication Date
Apr 01, 1984
Accession Number
ADP004216

Entities

People

  • J. R. Stephens
  • R. L. Dreshfield

Organizations

  • National Aeronautics and Space Administration

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Elements
  • Gas Turbine Rotors
  • Gas Turbines
  • High Temperature
  • Materials
  • Mechanical Properties
  • Microstructure
  • Resistance
  • Superalloys
  • Turbines
  • United States

Readers

  • Aerodynamics.
  • Metallurgy
  • Strategic Security Studies

Technology Areas

  • Space