, Volume 56, Issue 9, pp 44–48 | Cite as

The segregation of elements in high-refractory-content single-crystal nickel-based superalloys

  • E. C. Caldwell
  • F. J. Fela
  • G. E. Fuchs
Research Summary Solidification In Ni-Based Superalloys


Nickel-based superalloys are complex alloys that contain ten to 15 elements that are widely used in industries where high-temperature strength and corrosion resistance are required. Alloy additions commonly include Cr, Co, W, Ta, Al, Ti, Re, Mo, and, in some alloys, Ru. Each of these additions can affect the as-cast microstructure due to differences in elemental segregation. A better understanding of the effects of typical additions to nickel-based superalloys on the segregation of the elements in the alloy can help identify potential improvements in the processing of current alloys and the development of new alloys. Therefore, the effects of several common alloying additions on solidification segregation and defects were evaluated. In general, an increase in the degree of elemental segregation was observed with increases in each of the elements listed except cobalt and molybdenum. Increased levels of cobalt and molybdenum resulted in reductions in the segregation of most of the elements in the alloy.


Ruthenium Rhenium Chromium Content Interdendritic Region Segregation Behavior 
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Copyright information

© TMS 2004

Authors and Affiliations

  • E. C. Caldwell
    • 1
  • F. J. Fela
    • 1
  • G. E. Fuchs
    • 1
  1. 1.the Department of Materials Science and Engineering at the University of FloridaGainesville

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