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A comparative study of microstructure, compressive, and fracture properties of Ti3Al-based intermetallics produced via powder metallurgy, and melting and casting processes

  • Biljana Dimcic , Jelena Stasic , Olivera Radic and Dusan Bozic
Published/Copyright: May 15, 2013
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International Journal of Materials Research
From the journal International Journal of Materials Research Volume 103 Issue 11

Abstract

A comparative study of the microstructure, compressive properties, and fractography of Ti3Al and Ti3Al–Nb intermetallics produced via powder metallurgy and standard vacuum melting and casting processes has been carried out. Non-porous compacts were obtained via vacuum hot pressing of powders produced by mechanical alloying. Prior to compression tests, all samples were homogenized by a solution treatment at 1050°C (α + β region), followed by water quenching. The compression tests were performed from room temperature to 500°C in vacuum at a strain rate of 2.4 × 10–3s–1. Detailed microstructural characterization was conducted using scanning electron microscopy, followed by energy dispersive X-ray spectroscopy and X-ray diffraction analysis. Values of compressive mechanical properties of compacts were higher than those of castings. Fracture topography was examined by scanning electron microscopy. A correlation between ductility and the fracture mode exists for all materials.

Keywords: Titanium aluminides; Alloying; Powder metallurgy; Casting; Mechanical properties
∗ Correspondence address Dr Dusan Bozic, Institute of Nuclear Sciences “Vinca” Belgrade University, Mike Petrovica Alasa 12–1411000 BelgradeSerbia, Tel./Fax: +381112439454, E-mail:

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Received: 2011-4-20
Accepted: 2012-4-12
Published Online: 2013-05-15
Published in Print: 2012-11-01

© 2012, Carl Hanser Verlag, München

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https://doi.org/10.3139/146.110790
Keywords for this article
Titanium aluminides; Alloying; Powder metallurgy; Casting; Mechanical properties

Articles in the same Issue

  1. Contents
  2. Contents
  3. Award/Preisverleihung
  4. The Werner-Köster-Preis 2011
  5. Original Contributions
  6. Ostwald ripening in Al–Li alloys: A test of theory
  7. The Mg–C phase equilibria and their thermodynamic basis
  8. Experimental and thermodynamic study of nickel (30 wt.%Cr) – based alloys containing between 2.5 and 5.0 wt.% carbon
  9. Thermodynamic description of the system Cu–Sn–P experimental and numerical investigation
  10. Severe tempering of bainite generated at low transformation temperatures
  11. A comparative study of microstructure, compressive, and fracture properties of Ti3Al-based intermetallics produced via powder metallurgy, and melting and casting processes
  12. Rod-like structure and microhardness during directional solidification of Sn-1wt.%Cu eutectic alloy
  13. Properties of Si3N4/SiC composites produced via spark plasma sintering
  14. Formation of Al67Cu23Fe10 quasicrystals by microwave heating
  15. Magnetoelectric characteristics of cobalt-iron alloy–lead zirconate titanate bilayer planar structures
  16. On the texture and grain growth in hot-deformed and annealed WE54 alloy
  17. Numerical study of equal-channel angular pressing based on the element-free Galerkin method
  18. Dynamic behavior of staggered triangular honeycomb cores under in-plane crushing loadings
  19. Preparation and characterization of polyaniline/Fe3O4–polyacrylonitrile composite nanofibers
  20. Controlled release of ofloxacin from gelatin blended with cloisite 30B
  21. Short Communications
  22. Effect of sol concentration on the microstructures of barium hafnate titanate nanopowders
  23. People
  24. Horst Vehoff 65 years
  25. DGM News
  26. DGM News
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