Freeform Fabrication of Titanium Aluminide via Electron Beam Melting Using Prealloyed and Blended Powders

Cormier, Denis; Harrysson, Ola; Mahale, Tushar; West, Harvey

doi:https://doi.org/10.1155/2007/34737

Advances in Materials Science and Engineering

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Research Letter | Open Access

Volume 2007 | Article ID 034737 | https://doi.org/10.1155/2007/34737

Freeform Fabrication of Titanium Aluminide via Electron Beam Melting Using Prealloyed and Blended Powders

Denis Cormier,¹Ola Harrysson,¹Tushar Mahale,¹and Harvey West¹

Academic Editor: Rui Vilar

Received28 Oct 2007

Accepted27 Dec 2007

Published31 Jan 2008

Abstract

Titanium aluminide (TiAl) is an intermetallic compound possessing excellent high-temperature performance while having significantly lower density than nickel-based superalloys. This paper presents preliminary results of experiments aimed at processing TiAl via the electron beam melting (EBM) process. Two processing routes are explored. The first uses prealloyed powder, whereas the second explores controlled reaction synthesis. Issues such as processing parameters, vaporization of alloying elements, microstructure, and properties are discussed.

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Copyright

Copyright © 2007 Denis Cormier et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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