ECAE Methods of Structure Modification of Materials

Equal-channel angular ext rusion (ЕСАЕ) is one of the most efficient methods of severe plastic deformation of materials. The possibilities of structure modification of materials of different nature (metals, poly mers) by new variet ies of ECA E, equal-channel angular hydroextrusion (ECAH) and equal-channel mu ltip le-angular ext rusion (ECMA E) are investigated. Devices and technique of ECA H and ECMAE are described. The use of this methods ensured strength σт = 686 M Pa, elongation to failure δ = 2% and electrical conductivity at the level of 86.4% IACS fo r a copper wire of 0.5-mm in diameter, up to two times increase in critical current density and slightly influences the temperature of the transition to the superconducting state of NbTi alloy, up to several times increase in microhardness, rigid ity and strength of polymers with conserved high level of p lasticity.

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