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Microstructure and room temperature mechanical properties of Hf and Sn-doped Nb-20Ti-5Cr-3Al-18Si alloy

  • J. T. Guo , Y. X. Tian , L. Y. Sheng , L. Z. Zhou and H. Q. Ye
Published/Copyright: June 11, 2013
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International Journal of Materials Research
From the journal International Journal of Materials Research Volume 99 Issue 11

Abstract

In this paper, the effects of Sn and Hf additions on microstructures and room temperature mechanical properties of Nb-20Ti-5Cr-3Al-18Si alloy were investigated. The Sn addition has no significant effect on the microstructure of the alloy. Sn is preferentially partitioned in (Nb, Ti)ss rather than (Nb, Ti)5Si3. The addition of Sn decreases the solubility of Cr in (Nb, Ti)ss. The addition of Hf causes coarsening of the eutectic structure of (Nb, Ti)ss and (Nb, Ti)5Si3 and the formation of the Hf-rich γ(Nb, Ti)5Si3 along phase boundaries. With the addition of Sn the strength of the alloy decreases, while its ductility increases slightly. The Hf addition simultaneously improves strength and ductility of the alloy. The relationships between composition, microstructure and properties are discussed.

Keywords: Intermetallics; Microstructure; Mechanical properties
* Correspondence address, Prof. Jianting Guo, Superalloy Division, Institute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang 110016, China, Tel.: +86 24 2397 1917, Fax: +86 24 8397 8045, E-mail:

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Received: 2007-11-6
Accepted: 2008-7-11
Published Online: 2013-06-11
Published in Print: 2008-11-01

© 2008, Carl Hanser Verlag, München

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https://doi.org/10.3139/146.101763
Keywords for this article
Intermetallics; Microstructure; Mechanical properties

Articles in the same Issue

  1. Contents
  2. Contents
  3. Basic
  4. A model to calculate the viscosity of silicate melts
  5. A model to calculate the viscosity of silicate melts
  6. A note on the application of the phase rule
  7. Thermodynamic properties of liquid silver–indium–tin alloys determined from emf measurements
  8. Unconstrained solidification and characterisation of near-eutectic Al–Cu–Ag alloys
  9. Tensile properties of L12 intermetallic foils fabricated by cold rolling
  10. Microstructural control of FeB-inoculated mottled low-alloy white iron by a design of experiments approach
  11. Applied
  12. Dislocation structure and crystallite size distribution in lath martensite determined by X-ray diffraction peak profile analysis
  13. Effect of minor addition of Pb upon interfacial reactions and mechanical properties at Sn-3.0Ag-0.5Cu/Cu and Sn-58Bi/Cu solder joints
  14. Elastic properties of braided ceramic matrix composites
  15. The influence of microstructural characteristics and contaminants on the mechanical properties and fracture topography of low cost Ti6Al4V alloy
  16. Microstructure and room temperature mechanical properties of Hf and Sn-doped Nb-20Ti-5Cr-3Al-18Si alloy
  17. The effect of alloying elements on constrained carbon equilibrium due to a quench and partition process
  18. Hardfacing behavior of Cr–Ni stainless steel with Co-based super alloys
  19. Development of SMD 32.768 kHz tuning fork-type crystals
  20. Notification
  21. DGM News
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