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X-ray structural and spectral analyses, X-ray diffraction topography andmetallography were used to study dendrite structure of Al-4 wt % Cu singlecrystals grown by the Bridgman technique at a rate of 1 mm/min and on seedswith <001> orientation. The single crystals were obtained upon thecrystallization of the melt under the action of a pressure and thegravitational-field component directed along the surface of the crystallizationfront. Non-uniform distribution of copper in the solid solution and theeutectic content has been found in transverse section of single crystals andstrong increase in their concentration was observed at the lateral side of thesamples in the direction of the gravitational-field component action.Distribution of copper and the eutectic phase depend on pressure.

Features of formation of the Al-Cu single crystals structure under the action of pressure and gravitational field on the crystallization process