Practical Failure Analysis

, Volume 3, Issue 1, pp 55–59 | Cite as

Quench crack behavior of nickel-base disk superalloys

  • John Gayda
  • Pete Kantzos
  • Jason Miller
Peer Reviewed Articles


There is a need to increase the temperature capability of superalloy turbine disks to allow higher operating temperatures in advanced aircraft engines. When modifying processing and chemistry of disk alloys to achieve this capability, it is important to preserve the ability to use rapid cooling during supersolvus heat treatments to achieve coarse grain, fineγ′ microstructures. An important step in this effort is an understanding of the key variables controlling the cracking tendencies of nickel-base disk alloys during quenching from supersolvus heat treatments. The objective of this study was to investigate the quench cracking tendencies of several advanced disk superalloys during simulated heat treatments. Miniature disk specimens were rapidly quenched after solution heat treatments. The responses and failure modes were compared and related to the quench cracking tendencies of actual disk forgings. Cracking along grain boundaries was generally observed to be operative. For the alloys examined in this study, the solution temperature, not alloy chemistry, was found to be the primary factor controlling quench cracking. Alloys with high solvus temperatures show greater tendency for quench cracking.


nickel-base superalloys quench cracking turbine disk 


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    T.P. Gabb et al.: “The Tensile Properties of Advanced Nickel-Base Disk Superalloy During Quenching Heat Treatments,” NASA/TM—2001-211218, NASA-Glenn Research Center, Cleveland, Ohio, Oct. 2001.Google Scholar
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    T.P. Gabb, J. Telesman, P. Kantzos, and K. O’Connor: “Characterization of the Temperature Capabilities of Advanced Disk Alloy ME3,” NASA/TM—2002-211796, NASA-Glenn Research Center, Cleveland, Ohio, Aug 2002.Google Scholar
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    S.K. Jain: “High OPR Core Material (Aol 4.2.4), Regional Engine Disk Development,” AST Regional Disk Program Final Report, NAS3-27720, Nov 1999.Google Scholar

Copyright information

© ASM International - The Materials Information Society 2003

Authors and Affiliations

  • John Gayda
    • 1
  • Pete Kantzos
    • 2
  • Jason Miller
    • 3
  1. 1.Glenn Research CenterNational Aeronautics and Space AdministrationCleveland
  2. 2.Ohio Aerospace InstituteBrook Park
  3. 3.University of AkronAkron

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