SPS synthesis and consolidation of TiAl alloys from elemental powders: Microstructure evolution

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URI: https://hdl.handle.net/11556/4484
ISSN: 0966-9795
DOI: 10.1016/j.intermet.2013.01.006
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2013
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Abstract
Some works have studied the sintering of TiAl by means of Spark Plasma Sintering (SPS) and it is believed that it is possible to obtain very fine microstructures and very interesting mechanical properties. As raw materials, normally pre-alloyed powders have been used, obtained by atomization or mechanical alloying. However, few works have studied the consolidation of elemental powders. This work presents the synthesis and densification of TiAl-based alloys by means of Spark Plasma Sintering (SPS) using elemental powders as raw materials. The selected composition was Ti-48Al-2Cr-2Nb. The densification process, the evolution of the microstructure with the temperature and the diffusion of the elements (including heavy metals Cr and Nb) are presented. In addition, SPS products are compared with TiAl alloys from elemental powders obtained by conventional methods.
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A. Intermetallics , A. Titanium aluminides , C. Powder metallurgy , C. Reaction synthesis , G. Aerospace constructional uses , General Chemistry , Mechanics of Materials , Mechanical Engineering , Metals and Alloys , Materials Chemistry
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Lagos , M A & Agote , I 2013 , ' SPS synthesis and consolidation of TiAl alloys from elemental powders : Microstructure evolution ' , Intermetallics , vol. 36 , pp. 51-56 . https://doi.org/10.1016/j.intermet.2013.01.006