Effects of Composition on Solidification Microstructure of Cast Titanium Alloys

Abstract:

The high cost of processing of Ti alloys is an important limitation to their utilization in a number of applications. An approach to overcome such difficulties would be their processing by precision casting. The purpose of this work is to evaluate the centrifugal casting process of Ti-Cu and Ti-Nb alloys, analysing the influence of alloying element type and content in the obtained microstructure. Samples with different compositions were prepared in arc furnace with non-consumable tungsten electrode and water-cooled copper hearth under high purity argon atmosphere and cast in a copper mould. Microstructures were analysed by SEM, characterized by EDS and X-ray diffraction. Vickers hardness measurements helped the analysis of phases.

• Periodical: Materials Science Forum (Volume 649)
• Pages: 183-188
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.649.183
• Online since: May 2010
• Authors: P.N. Andrade, A.A. Coelho, C.R.M. Afonso, R.J. Contieri, Maria Helena Robert, R. Caram
• Keywords: Casting Process, Phase Transformation, Solidification, Titanium Alloy

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