Influence of sintering parameters on the properties of powder metallurgy Ti–3Al–2.5V alloy

The processing of near net shape Ti–3Al–2.5V components using the conventional pressing and sintering route is addressed in this study. The Ti–3Al–2.5V starting powder was obtained considering both the blending elemental and the master alloy addition methods. The powders were uniaxially pressed and...

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Bibliographic Details
Published in:Materials characterization 2013-10, Vol.84, p.48-57
Main Authors: Bolzoni, L., Ruiz-Navas, E.M., Gordo, E.
Format: Article
Language:English
Subjects:
Applied sciences
Cross-disciplinary physics: materials science
rheology
Electrical resistivity
Exact sciences and technology
Flexural properties
Materials science
Metals. Metallurgy
Phase diagrams and microstructures developed by solidification and solid-solid phase transformations
Physics
Powder metallurgy (PM)
Powder metallurgy. Composite materials
Production techniques
Sintered metals and alloys. Pseudo alloys. Cermets
Solidification
Thermal conductivity
Titanium alloys
Ti–3Al–2.5V
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Summary:The processing of near net shape Ti–3Al–2.5V components using the conventional pressing and sintering route is addressed in this study. The Ti–3Al–2.5V starting powder was obtained considering both the blending elemental and the master alloy addition methods. The powders were uniaxially pressed and sintered in a high-vacuum furnace under various temperature–time combinations. The influence of the processing parameters on the relative density, microstructural features, amount of interstitials, mechanical behaviour, thermal conductivity and electrical resistivity of the sintered materials was evaluated. It was found that the relative density of the samples increases with processing temperature and time, and almost fully dense materials were obtained. The mechanical performance of the Ti–3Al–2.5V improves due to the reduction of the residual porosity and are, generally, of the same order of magnitude of those required for titanium biomedical products. Furthermore, the temperatures–times selected permit to obtain thermal and electrical properties similar to the wrought alloy. •Ti-3Al-2.5V is fabricated by blending elemental and master alloy addition powders•The effect of sintering parameters on the final properties is evaluated•Flexural properties of powder metallurgy Ti-3Al-2.5V alloy are asserted•Thermal conductivity and electrical resistivity of Ti-3Al-2.5V is determined
ISSN:1044-5803
1873-4189
DOI:10.1016/j.matchar.2013.07.009