Microstructural and Mechanical Properties of Copper Processed by Equal Channel Angular Extrusion

摘要: The spurt in research activities pertaining to nanotechnology, much interest has arisen processes involving severe plastic deformation. Equal channel angular pressing (ECAP) particular drawn considerable attention due its potential produce ultrafine-grained or some cases nanometer grain size materials bulk form. It is now well known that with such small sizes have extraordinary properties and, as simultaneous ultrahigh strength and high ductility the capability of superplastic forming. They therefore great for technological applications. extrusion (ECAE) was used investigate formation submicron copper deformed ultra-high strains by die angle 90°. mechanical result characterized use tensile tests, microhardness measurement Scanning Electron Microscopy (SEM) Differential Calorimetry (DSC). ECA extrusions at room temperature a significant reduction fragmentation preexisting coarse grains. In TEM, many grains are separated high-angle boundaries. For specimen N = 2, A drop hardness level observed 573 K, indicating fully recrystallized state achieved.