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Preparation of Ti-5553 Alloy by Different Extrusion Processes from Elemental Powder Mixtures

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Abstract:

Ti-5553 (Ti-5Al-5V-5Mo-3Cr, wt. %) alloy is a recently developed near β titanium alloy and it has a very good hardenability, good ductility and high strength. In this study, we discussed the feasibility of preparing Ti-5553 alloy by different processes from powder mixtures of hydride-dehydride titanium powder, elemental powders and master alloy powders, including (1) direct extrusion of powder compact in argon, (2) extrusion of the vacuum-sintered billet in air and (3) extrusion of the hot-pressed billet in air. XRD, OM and SEM were used to determine the phase constitutions and microstructures of the prepared Ti-5553 alloys, and mechanical test was performed to examine their mechanical properties. The results showed the microstructures and phase constitutions of Ti-5553 alloys were significantly affected by different processes, which resulted in the relevant mechanical properties. The effect of the selected heat treatment on the microstructures and properties of Ti-5553 alloy were investigated as well.

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Periodical:

Key Engineering Materials (Volume 770)

Pages:

31-38

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.770.31

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Online since:

May 2018

Authors:

Fei Yang*, Brian Gabbitas, Stiliana Raynova, Ajit Pal Singh, Leandro Bolzoni

Keywords:

Mechanical Properties, Microstructure, Powder Extrusion, Ti-5553 Alloy

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© 2018 Trans Tech Publications Ltd. All Rights Reserved

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