ECAE Methods of Structure Modification of Materials

摘要

Equal-channel angular extrusion (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, polymers) by new varieties of ECAE, equal-channel angular hydroextrusion (ECAH) and equal-channel multiple-angular extrusion (ECMAE) are investigated. Devices and technique of ECAH and ECMAE are described. The use of this methods ensured strength σ_т = 686 MPa, elongation to failure δ = 2% and electrical conductivity at the level of 86.4% IACS for 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, rigidity and strength of polymers with conserved high level of plasticity.