Ruag Munition

Gian-Carlo Gullo

Peter J Uggowitzer

Markus Speidel

Kurt Steinhoff

A process for the production of a material made of a metal alloy for subsequent forming of the material in the semi-solid state, provides that the metal alloy (X) is brought to a starting temperature that is above the liquidus. An additive is added which is capable of reducing an interfacial surface energy between the solid phase and the liquid phase after the metal alloy has been mixed with the additive and transformed into the semi-solid state. The volume fraction of the additive (Z) is selected in such a way that, in the semi-solid material at a liquid phase fraction (f ) of 15% to 75%, the grain size (D) and the degree of skeletization (f C ) during a holding time (t) of more than 15 minutes remain essentially constant in order to retain the formability of a suspension.

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Zurich, Switzerland

Gian-Carlo Gullo