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- Title
Design Optimisation of the Feeding System of a Novel Counter-Gravity Casting Process.
- Authors
Papanikolaou, Michail; Pagone, Emanuele; Georgarakis, Konstantinos; Rogers, Keith; Jolly, Mark; Salonitis, Konstantinos
- Abstract
The appropriate design of feeders in a rigging system is critical for ensuring efficient compensation for solidification shrinkage, thus eliminating (shrinkage-related) porosity and contributing to the production of superior quality castings. In this study, a multi-objective optimisation framework combined with Computational Fluid Dynamics (CFD) simulations has been introduced to investigate the effect of the feeders' geometry on shrinkage porosity aiming to optimise casting quality and yield for a novel counter-gravity casting process (CRIMSON). The weighted sum technique was employed to convert this multi-objective optimisation problem to a single objective one. Moreover, an evolutionary multi-objective optimisation algorithm (NSGA-II) has been applied to estimate the trade-off between the objective functions and support decision makers on selecting the optimum solution based on the desired properties of the final casting product and the process characteristics. This study is one of the first attempts to combine CFD simulations with multi-objective optimisation techniques in counter-gravity casting. The obtained results indicate the benefits of applying multi-objective optimisation techniques to casting processes.
- Subjects
COMPUTATIONAL fluid dynamics; SOLIDIFICATION; POROSITY; FLUID dynamics; RISERS (Founding)
- Publication
Metals (2075-4701), 2018, Vol 8, Issue 10, p817
- ISSN
2075-4701
- Publication type
Article
- DOI
10.3390/met8100817