Evolution of Copper Microstructure Subjected to Equal Channel Angular Pressing
Abstract
This paper aims to study bulk severe plastic deformation processes capable to produce ultrafine grain and also nanostructured 3D materials, interesting for processing in current industry. Samples of copper alloy were solution treated and then were subjected to repetitive Equal Channel Angular Pressing at room temperature in 1 to 8 passes, using route C. Severely deformed specimens were studied after each deformation pass. Their microstructural evolution and mechanical properties were investigated. Optical microscopy progression is evaluated on each separate ECAP pass. It is well known that although copper is a deficient resource it is used to the same extent as aluminum, a rich resource on the earth’s crust. This research signs up in the category of new technologies for obtaining bulk metallic nanostructures that allow more judicious use of copper alloys by the substantial improvement of properties of use.
References
[2]. A. Azushima, R. Kopp, A. Korhonen, D.Y. Yang - Severe plastic deformation (SPD) processes for metals, Manufacturing Techology 37, (2008) 716-735.
[3]. H. Gleiter - Nanostructured Materials: Basic Concepts, Microstructure and Properties, Forschungszentrum Karlsruhe, Institut fur Nanotechnologie, Postfach 36 40, D-76021 Karlsruhe.
[4]. M.A. Meyers et al. - Progress in Materials Science 51 (2006) 427–556.
[5]. S. Ramtani et al. - A revisited generalized self-consistent polycrystal model , Int. J. Eng. Sci. (2008).
[6]. Saiyi Li. - A crystal plasticity-based explanation for the dependencies of grain refinement on processing route and die angle in equal channel angular extrusion, Scripta Materialia xxx (2009) xxx–xxx.
[7]. A.R. Eivani, A. Karimi Taheri - A new method for estimating strain in equal channel angular extrusion, Journal of Materials Processing Technology 183 (2007) 148-153.
