Microstructures and mechanical properties of pure copper deformed severely by equal-channel angular pressing and high pressure torsion
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Pure Cu of 99.98 wt.% purity has been processed at room temperature by diverse techniques of severe plastic deformation, namely equalchannel angular pressing (ECAP), high pressure torsion (HPT) and a combination of both in order to find out the evolution on the microstructural homogeneity for each of the processes and their combination. Starting with a grain size of ∼60 m, severe plastic deformation has been introduced to the material while maintaining the sample dimensions unchanged through the processes of ECAP and HPT. A significant decrease in grain size was observed by transmission electronic microscopy (TEM). Microtensile and microhardness tests were carried out on the deformed material in the three processing conditions. A significant improvement of the tensile strength was promoted with admissible penalization on ductility.
CitacióLugo, N. [et al.]. Microstructures and mechanical properties of pure copper deformed severely by equal-channel angular pressing and high pressure torsion. "Materials science and engineering A. Structural materials properties microstructure and processing", Febrer 2008, vol. 477, p. 366-371.