Journal of Materials Science

, Volume 27, Issue 14, pp 3869–3875 | Cite as

Role of zirconium in the phase formation at the interdendritic zone in nickel-based superalloys

  • E. Gozlan
  • M. Bamberger
  • S. F. Dirnfeld
  • B. Prinz


A commercial Alloy 80A and a modified alloy with lower titanium and zirconium contents, e.g. 1.4% and <0.01%, respectively, were subjected to unidirectional solidification followed by a rapid quench in water to preserve the structure at elevated temperatures. The slow solidification results in a coarse dendritic structure with a high enrichment of sulphur (up to 2%), aluminium (up to 4%), titanium (up to 13%) and zirconium in the interdendritic zones. In the commercial Alloy 80A, the zirconium and sulphur present in the interdendritic zone result in a eutectic containing ZrS and NiCrTi-matrix. Excess zirconium forms an NiZr-intermetallic. No TiS is formed in this case. In the absence of zirconium, the titanium enriched in the interdendritic residual melt forms a eutectic of TiS. In both cases the effective solidus temperature corresponding to the composition of the residual melt is 1170°C, compared to 1330 °C, which is the solidus temperature of the bulk material.


Polymer Titanium Zirconium Elevated Temperature Bulk Material 
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Copyright information

© Chapman & Hall 1992

Authors and Affiliations

  • E. Gozlan
    • 1
  • M. Bamberger
    • 1
  • S. F. Dirnfeld
    • 1
  • B. Prinz
    • 2
  1. 1.Department of Materials EngineeringTechnionHaifaIsrael
  2. 2.Metallgesellschaft AGFrankfurtGermany

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