Nanostructurisation of hypoeutectic silumin by electroexplosion alloying and subsequent electron beam processing

Abstract

The structure, phase composition and defect substructure of the surface layers of hypoeutectic silumin after the complex processing including the electroexplosion alloying (EEA) by the yttrium oxide powder and the subsequent electron beam processing have been analysed by the methods of modern physical materials science. The complex processing is accompanied by the dissolution of the silicon inclusions and intermetallides and the formation of the submicro- and nanodimensional structures. The modified layer (70 μm) is multielemental and it has the structure of high velocity cellular crystallisation.