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Journal of Materials Science

, Volume 14, Issue 10, pp 2500–2508 | Cite as

Observations of cellular transformation products in nickel-base superalloys

  • Claire Y. Barlow
  • Brian Ralph
Papers

Abstract

Transmission electron microscopy has been used to identify the products in cellularly transformed regions of alloys based on the Nimonic 80 A composition. The commercial alloy is shown to undergo a small degree of cellular transformation even after conventional heat treatments, while recrystallization is found to increase the incidence of this reaction type. Low carbon versions of this alloy demonstrate cellular precipitation over a wider range of heat treatments.

It is shown that the cellular reaction may take place in these alloys under a variety of different conditions and with a range of driving forces. Reasons for this unexpected behaviour are offered, as is a suggestion as to why the cellular reaction occurs on a local scale.

Keywords

Carbide Carbide Particle Boundary Migration Chromium Carbide Cellular Reaction 

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Copyright information

© Chapman and Hall Ltd. 1979

Authors and Affiliations

  • Claire Y. Barlow
    • 1
  • Brian Ralph
    • 1
  1. 1.Department of Metallurgy and Materials ScienceUniversity of CambridgeUK

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