Abstract
An approach to amorphization and/or nanostructurization of a metal surface layer is proposed utilizing a skin effect induced by a high power electric pulse. Modeling electric and magnetic fields and heat transfer in a metallic cylinder predicts that melting followed by rapid quenching can occur in a thin skin layer if the amplitude of a passing electric pulse is high enough. The quenching rates can reach 108–109K∕s, giving rise to an opportunity of surface amorphization and spectacular surface structure modification in a wide range of metallic systems. Justifying the approach, a glassylike structure has been found experimentally in ordinary stainless steel subjected to the treatment proposed. Furthermore, specific ultradispersed structures containing nanocrystalline particles embedded into amorphous matrix or twin lamellar structures with nanodimensions can be produced in the subsurface layer.
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