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Metallurgical and Materials Transactions A

, Volume 37, Issue 2, pp 405–410 | Cite as

Influence of topologically closed packed phase formation on creep rupture life of directionally solidified nickel-base superalloys

  • A. Volek
  • R. F. Singer
  • R. Buergel
  • J. Grossmann
  • Y. Wang
Article

Abstract

Several experimental superalloy compositions based on the alloy IN792 were investigated. Creep rupture properties were measured and microstructures in the as-heat-treated condition and after creep rupture testing were evaluated. Two types of topologically closed packed (TCP) phases have been observed. Type 1 occurs in alloys with increased additions of the γ′-formers Al and Ta and shows detrimental effects on creep rupture life. Type 2 precipitates in Re-containing alloys are much smaller in size and volume fraction than type 1 and are found not to influence the creep rupture properties. The different effect of type 1 and 2 TCP phases can be rationalized in terms of the amount of precipitate and the resulting matrix depletion of solid solution strengtheners.

Keywords

Material Transaction Solid Solution Strengthen Isothermal Aging Creep Rupture Alloy IN792 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© ASM International & TMS-The Minerals, Metals and Materials Society 2006

Authors and Affiliations

  • A. Volek
    • 1
  • R. F. Singer
    • 1
  • R. Buergel
    • 2
  • J. Grossmann
    • 3
  • Y. Wang
    • 4
  1. 1.the Department of Material SciencesWTM InstituteErlangenGermany
  2. 2.the Department of Materials and Chemical EngineeringOsnabrück University of Applied SciencesOsnabrückGermany
  3. 3.Doncasters Precision Castings Bochum GmbHBochumGermany
  4. 4.Department of Materials Science, If W InstituteTechnical University of DarmstadtDarmstadtGermany

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