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Numerical modelling of the tilt casting process for γ-TiAl alloys

Numerical modelling of the tilt casting process for γ-TiAl alloys

Wang, H., Djambazov, G. ORCID: 0000-0001-8812-1269, Pericleous, K.A. ORCID: 0000-0002-7426-9999, Harding, R.A. and Wickins, M. (2013) Numerical modelling of the tilt casting process for γ-TiAl alloys. Foundry Trade Journal International, 187 (3705). pp. 150-157. ISSN 1758-9789

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The tilt casting method is used to achieve tranquil filling of γ-TiAl turbine blades up to 400mm long. The reactive titanium alloy is induction melted in a cold crucible, and the crucible with the attached mould then rotated through 180° to transfer the metal into the mould. In the cold crucible, heat losses to the water-cooled copper walls and base limit the superheat available,increasing the risk of premature freezing during mould filling. A compromise is required between fast and low rotations to minimise the casting defects,such as misruns or gas entrainment. Simulations are presented using the authors' computational fluid dynamics code with several novel developments in front tracking, heat transfer algorithms and turbulence model adaptation which accounts for an advancing solid front. The computational results are validated against prototype castings produced at the University of Birmingham, and the model then used to optimise the tilt-casting process.

Item Type: Article
Additional Information: [1] Technical paper.
Uncontrolled Keywords: titanium turbine blades, tilt casting, aerospace materials, process modelling
Subjects: Q Science > QA Mathematics > QA76 Computer software
T Technology > TP Chemical technology
Pre-2014 Departments: School of Computing & Mathematical Sciences
School of Computing & Mathematical Sciences > Centre for Numerical Modelling & Process Analysis > Computational Science & Engineering Group
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Last Modified: 02 Mar 2019 15:53

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