Journal of Materials Science

, Volume 19, Issue 10, pp 3121–3139

The role of alloying elements in the design of nickel-base superalloys

Authors

  • A. K. Jena
    • Department of Metallurgical EngineeringIndian Institute of Technology
  • M. C. Chaturvedi
    • Department of Mechanical EngineeringUniversity of Manitoba
Review

DOI: 10.1007/BF00549796

Cite this article as:
Jena, A.K. & Chaturvedi, M.C. J Mater Sci (1984) 19: 3121. doi:10.1007/BF00549796

Abstract

The constituents of nickel-base superalloys have been classified into solid solution formers, precipitate formers, carbide formers and surface stabilizers. The characteristics of solutes which would make them most suitable in each category have been specified and appropriate alloying elements have been identified. Nickel-base superalloys are hardened primarily by the precipitation of Ni3X type compounds. The occurrence and crystallography of precipitation of various kinds of Ni3X type precipitates have been considered. The role of substitution by alloying elements on mismatch and stability of phases has been discussed. The free electron model and the Engel-Brewer model have been applied for evaluating the stabilities of precipitates, and the role of the alloying elements in determining the stabilities of external and internal surfaces such as grain boundaries have been briefly outlined.

Copyright information

© Chapman and Hall Ltd. 1984