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Beyond Ni-based superalloys: Development of CoRe-based alloys for gas turbine applications at very high temperatures

Dedicated to Prof. Dr.-Ing. Heinrich Wollenberger on the occasion of his 80th birthday
  • Debashis Mukherji , Joachim Rösler , Pavel Strunz , Ralph Gilles , Gerhard Schumacher and Sebastian Piegert
Published/Copyright: May 18, 2013
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International Journal of Materials Research
From the journal International Journal of Materials Research Volume 102 Issue 9

Abstract

High temperature material development is mainly driven by gas turbine needs. Today, Ni-based superalloys are the dominant material class in the hot section of turbines. Material development will continue to push the maximum service temperature of Ni-superalloys upwards. However, this approach has a fundamental limit and cannot be sustained indefinitely, as the Ni-superalloys are already used very close to their melting point. Within the framework of a DFG Forschergruppe program (FOR 727) – “Beyond Ni-base Superalloys” – CoRe based alloys are being developed at the Technische Universität Braunschweig as a new generation of high temperature materials that can be used at + 100 °C above single crystal Ni-superalloys. Two main strengthening concepts, namely precipitation hardening by MC carbides and composite hardening by Co2Re3-type σ phase are being explored in CoRe alloy development. Selected results of microstructural characterizations, including in-situ measurements by synchrotron and neutron scattering are presented.

Keywords: Co-base alloy; Rhenium; Electron microscopy; Synchrotron scattering; Neutron scattering
∗ Correspondence address, Dr. Debashis Mukherji, Technical University Braunschweig, If W, Langer Kamp 8, D-38106 Braunschweig, Germany, Tel.: +49 531 3913 062, Fax: +49 531 3913 058, E-mail:

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Received: 2010-11-29
Accepted: 2011-7-12
Published Online: 2013-05-18
Published in Print: 2011-09-01

© 2011, Carl Hanser Verlag, München

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  2. Contents
  3. Editorial
  4. Prof. Dr.-Ing. Heinrich Wollenberger — 80 years
  5. Original Contributions
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  7. Accumulation of radiation damage and disordering in MgAl2O4 under swift heavy ion irradiation
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  10. Materials issues of the SINQ high-power spallation target
  11. The origin and development of the P{011}<111> orientation during recrystallization of particle-containing alloys
  12. Coarsening kinetics of Cu-rich precipitates in a concentrated multicomponent Fe–Cu based steel
  13. Beyond Ni-based superalloys: Development of CoRe-based alloys for gas turbine applications at very high temperatures
  14. The effect of heat treatments on the microstructure, texture and mechanical properties of the extruded magnesium alloy ME21
  15. Analysing SANS data to determine magnetisation reversal processes in composite perpendicular magnetic recording media using TEM images
  16. Dislocationless sliding in a polycluster glass
  17. Evolution of transformation plasticity during bainitic transformation
  18. Surface tension and viscosity of NiAl catalytic precursor alloys from microgravity experiments
  19. Synthesis of carbon nanotubes by fine Ni particles in Ni3Al foam
  20. Fabrication of dielectric thin films by sputtering deposition at different pressures with (Ba0.3Sr0.7)(Zn1/3Nb2/3)O3 ceramic as target
  21. DGM News
  22. DGM News
https://doi.org/10.3139/146.110563
Keywords for this article
Co-base alloy; Rhenium; Electron microscopy; Synchrotron scattering; Neutron scattering

Articles in the same Issue

  1. Contents
  2. Contents
  3. Editorial
  4. Prof. Dr.-Ing. Heinrich Wollenberger — 80 years
  5. Original Contributions
  6. Atom probe tomography: from physical metallurgy towards microelectronics
  7. Accumulation of radiation damage and disordering in MgAl2O4 under swift heavy ion irradiation
  8. TEM study of irradiation induced copper precipitation in boron alloyed EUROFER97 steel
  9. Order – disorder transformation in Ni – V alloys under electron irradiation
  10. Materials issues of the SINQ high-power spallation target
  11. The origin and development of the P{011}<111> orientation during recrystallization of particle-containing alloys
  12. Coarsening kinetics of Cu-rich precipitates in a concentrated multicomponent Fe–Cu based steel
  13. Beyond Ni-based superalloys: Development of CoRe-based alloys for gas turbine applications at very high temperatures
  14. The effect of heat treatments on the microstructure, texture and mechanical properties of the extruded magnesium alloy ME21
  15. Analysing SANS data to determine magnetisation reversal processes in composite perpendicular magnetic recording media using TEM images
  16. Dislocationless sliding in a polycluster glass
  17. Evolution of transformation plasticity during bainitic transformation
  18. Surface tension and viscosity of NiAl catalytic precursor alloys from microgravity experiments
  19. Synthesis of carbon nanotubes by fine Ni particles in Ni3Al foam
  20. Fabrication of dielectric thin films by sputtering deposition at different pressures with (Ba0.3Sr0.7)(Zn1/3Nb2/3)O3 ceramic as target
  21. DGM News
  22. DGM News
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