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Microstructure and room temperature compressive properties of holmium doped DS NiAl-Cr(Mo)-Hf eutectic alloy

  • Y. C. Liang , J. T. Guo , Y. Xie , Y. X. Tian , L. Z. Zhou and Z. Q. Hu
Published/Copyright: June 11, 2013
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International Journal of Materials Research
From the journal International Journal of Materials Research Volume 100 Issue 2

Abstract

The microstructure and mechanical property of a eutectic Ni-33Al-28Cr-5.94Mo-0.05Hf-0.01Ho (holmium) alloy fabricated by using directional solidification under two withdrawal rates (3 mm min– 1 and 10 mm min– 1) are presented. It is shown that a promising as-cast microstructure is formed under the higher withdrawal rate, which can be characterized by the refinement of eutectic cells as well as eutectic lamellae between the NiAl and Cr(Mo) phases within the cells. As a positive response to this, superior room temperature mechanical properties with yield strength of 1153 MPa and compressive strain of 37 % are obtained. Based on these investigations, the mechanism responsible is discussed.

Keywords: NiAl; Intermetallics; Directional solidification; Microstructure; Mechanical properties
* Correspondence address, Prof. J. T. Guo, Superalloys Division, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110016, P.R. China, Tel.: +86 24 2397 1917, Fax: +86 24 8397 8045, E-mail:

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Received: 2008-4-22
Accepted: 2008-10-21
Published Online: 2013-06-11
Published in Print: 2009-02-01

© 2009, Carl Hanser Verlag, München

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https://doi.org/10.3139/146.110006
Keywords for this article
NiAl; Intermetallics; Directional solidification; Microstructure; Mechanical properties

Articles in the same Issue

  1. Contents
  2. Contents
  3. Feature
  4. Materials constitution and computational thermodynamics in the context of 100 years of IJMR – Zeitschrift für Metallkunde
  5. Upgrading CALPHAD to microstructure simulation: the phase-field method
  6. Prediction, determination and validation of phase diagrams via the global study of energy landscapes
  7. Alloy development using modern tools
  8. Phase equilibria and thermal analysis in the Fe–Mn–Ni system
  9. Integrated approach to thermodynamics, phase relations, liquid densities and solidification microstructures in the Al–Bi–Cu system
  10. Formation of clathrates Ba–M–Ge(M = Mn, Fe, Co)
  11. New paradigm of a metastable phase diagram presenting structural transformations induced by annealing of Si–C–N amorphous ceramics derived from polymer precursors
  12. Basic
  13. Thermodynamic assessment of the Ce–Si, Y–Si, Mg–Ce–Si and Mg–Y–Si systems
  14. Thermodynamic re-assessment of the Ti–Al–Nb system
  15. Effect of varying oxygen partial pressure on the properties of reactively evaporated zinc aluminate thin films
  16. Applied
  17. Matrix induced synthesis of Y3Al5O12: Ce phosphor through the Pechini method
  18. Microstructure and room temperature compressive properties of holmium doped DS NiAl-Cr(Mo)-Hf eutectic alloy
  19. Evaporation mechanism of aluminum during electron beam cold hearth melting of Ti64 alloy
  20. 560°C isothermal section of the Zn–Fe–Ni–Si quaternary system at the zinc-rich corner
  21. DGM News
  22. Personal
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