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Liquid metal model experiments on casting and solidification processes

Cramer, A.; Eckert, S.; Galindo, V.; Gerbeth, G.; Willers, B.; Witke, W.

This paper is concerned with laboratory studies using liquid metals with Tmelt £ 300°C to model realistic processes. Considering three selected examples the main features of such cold models are described. In the first instance we examine an aluminium alloy investment casting process. The request to reduce the high flow velocities was served by the installation of a d.c. magnetic field. Local velocity measurements as well as integrated flow rate determination have been carried out utilizing eutectic InGaSn (Tmelt = 10°C). As a second example, model experiments on the electromagnetic stirring of liquid metals have been performed in a cylindrical cavity. We applied a rotating (RMF) and a travelling magnetic field, and recorded flow maps by means of the ultrasonic Doppler velocimetry. With the goal of an efficient 3D-mixing first measurements with promising results were done for the combination of both field types. Third, we report on systematic studies of the impact exerted by a RMF on the solidification of a PbSn alloy. Directional solidification experiments demonstrate the influence of the electromagnetically driven convection on the resulting microstructure.

  • Journal of Materials Science 39(2004), 7285-7294

Permalink: https://www.hzdr.de/publications/Publ-6133
Publ.-Id: 6133