title: High pressure die casting of Fe-based metallic glass.
abstract: Soft ferromagnetic Fe-based bulk metallic glass key-shaped specimens with a maximum and minimum width of 25.4 and 5 mm, respectively, were successfully produced using a high pressure die casting (HPDC) method, The influence of die material, alloy temperature and flow rate on the microstructure, thermal stability and soft ferromagnetic properties has been studied. The results suggest that a steel die in which the molten metal flows at low rate and high temperature can be used to produce completely glassy samples. This can be attributed to the laminar filling of the mold and to a lower heat transfer coefficient, which avoids the skin effect in the steel mold. In addition, magnetic measurements reveal that the amorphous structure of the material is maintained throughout the key-shaped samples. Although it is difficult to control the flow and cooling rate of the molten metal in the corners of the key due to different cross sections, this can be overcome by proper tool geometry. The present results confirm that HPDC is a suitable method for the casting of Fe-based bulk glassy alloys even with complex geometries for a broad range of applications.
authors.affiliation: IFW Dresden, Institute for Complex Materials, Helmholtzstr. 20, D-01069 Dresden, Germany.
authors.forename: Parthiban
authors.initials: P
authors.lastname: Ramasamy
authors.affiliation: Breuckmann GmbH &Co KG Heiligenhaus, Germany.|Budapest University of Technology and Economics, Dept. of Auto. and Vehicle Manufacturing, Stoczek str. 6, H-1111 Budapest, Hungary.
authors.forename: Attila
authors.initials: A
authors.lastname: Szabo
authors.affiliation: Breuckmann GmbH &Co KG Heiligenhaus, Germany.
authors.forename: Stefan
authors.initials: S
authors.lastname: Borzel
authors.affiliation: IFW Dresden, Institute for Complex Materials, Helmholtzstr. 20, D-01069 Dresden, Germany.|TU Dresden, Institute of Materials Science, D-01062 Dresden, Germany.
authors.forename: Jürgen
authors.initials: J
authors.lastname: Eckert
authors.affiliation: IFW Dresden, Institute for Complex Materials, Helmholtzstr. 20, D-01069 Dresden, Germany.|Politehnica University Timisoara, P-ta Victoriei 2, RO-300006 Timisoara, Romania.
authors.forename: Mihai
authors.initials: M
authors.lastname: Stoica
authors.affiliation: Breuckmann GmbH &Co KG Heiligenhaus, Germany.
authors.forename: András
authors.initials: A
authors.lastname: Bárdos