MCROSTRUCTURES AND PROPERTIES OF PURE COPPER PROCESSESD BY EQUAL CHANNEL ANGULAR ROLLING PROCESS

Equal channel angular rolling, based on the equal channel angular pressing, is a severe plastic deformation process which can develop the grains below lum in diameter. Effect of pass number and routes of process on microstructure, mechanical properties and electrical conductivity of commercial pure copper strips processed by equal channel angular rolling were investigated. Scanning electron and atomic force microscopic micrographs of the strips produced by ten passes of equal channel angular rolling process showed nano-grains r 40-200 nm in size. Also yield and tensile strengths of samples increased with increasing the number of passes, whereas their ductility significantly decreased. The electrical conductivity varied slightly. So, equal channel angular rolling process causes high strength and high conductivity copper byproducing nanostructured pure copper. Comparing between two routes properties showed non-uniform behavior in route A.

کلیدواژه ها:

Sever Plastic Deformation ، Equal Channel Angular Rolling ، Nanostructured Copper