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Meeting Liquid Metal Processing & Casting Conference (LMPC 2019)
Symposium Liquid Metal Processing & Casting
Presentation Title Influence of Gap Formation and Heat Shrinkage Induced Contact Pressure on the Development of Heat Transfer in Gravity Die Casting Processes
Author(s) Thomas Vossel, Björn Pustal, Andreas Bührig-Polaczek
On-Site Speaker (Planned) Thomas Vossel
Abstract Scope Anticipating the processes and parameters involved for accomplishing a sound metal casting requires an in-depth understanding of the underlying behaviors characterizing a liquid melt solidifying inside its mold. With heat balance and thermomechanical effects as two essential aspects of the casting process, numerical simulations can be used as a tool to predict the advancing solidification and the occurring stress-strain formation. A manifold of parameters gets incorporated in such simulations with some parameters being hard to define in advance. The heat transfer serves as a primal example for such an estimated parameter. This paper evaluates different approaches to estimate the heat transfer coefficient for A356 gravity die casting and will discuss the significance of not treating heat transfer as a pure function of temperature or time but as an effect-driven variable that has to be adjusted locally due to the possibility of local gap forming and heat shrinkage induced contact pressure.
Proceedings Inclusion? Definite: At-meeting proceedings

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