Author(s)

J. Szajnar

Abstract

Analysis of columnar crystals growth during the solidification in magnetic field J. Szajnar Foundry Institute, Silesian Technical University, 44-10® Gliwice, Towarowa 7, Poland ABSTRACT Interaction of rotational magnetic field on molten metal solidifying in a mould causes an intensive motion of liquid material. In these conditions a crystallization process and primary structure of casting is generated. In this paper the investigations concerning experimental and numerical analysis of Al 99.7 primary structure formation are presented. First of all conditions of columnar crystals formation have been taken into account. The crystals come into existence in molten metal being in rotational constrained motion and the direction of their growth is a result of asymmetrical heat flux distribution on the surface of crystal front. The numerical computations confirmed that a changeable heat transfer coefficient on the crystal front surface causes the aberration of crysta

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