caa a22 4500 463231228 CHVBK 20180405153242.0 cr unu---uuuuu 170326e20070301xx s 000 0 eng 10.1007/s10853-006-1283-1 doi (NATIONALLICENCE)springer-10.1007/s10853-006-1283-1 Recent progress on the study of the microstructure and mechanical properties of ECAE copper [Elektronische Daten] [Florian Dalla Torre, Azdiar Gazder, Elena Pereloma, Christopher Davies] Results on the microstructure and the tensile properties of equal channel angular extruded (ECAE) copper processed for one to 16 passes are presented and compared with the available literature data. With increasing number of passes (N), the microstructure changes from a strongly elongated shear band structure after N=1 and 2, towards a more equiaxed subgrain and grain structure. This is accompanied by a decrease in the cell wall or subgrain-boundary widths and an increase in recovered or even recrystallised grain structures with low dislocation densities. Electron backscatter diffraction measurements have indicated that for lower N, the location of Σ3 boundaries is restricted to shear bands, while at greater N, Σ3 boundaries were found to be more widely distributed. Texture measurements indicate close similarity with simple shear texture components and a spread of the orientation components with greater N. Upon comparing the tensile behaviour of as-ECAE Cu with the surveyed literature, broad agreement on the strength of the material is achieved. However, a strong variation in the percentage elongation to failure is also noted. Strain hardening and deformation kinetic analysis via strain rate jump tests indicate an evolution from stage III to V hardening during post-ECAE compression and a saturation in the strain rate sensitivity after N=4 resulting in maximum values of ∼0.02. Our results suggest that rather than a change in deformation mechanism, the increase in ductility with increasing N is associated with an increase in the mean free path of dislocations—with the grain boundaries remaining actively involved as the transmitter of plastic strain and their interaction with dislocations being the rate controlling deformation mechanism. Springer Science+Business Media, LLC, 2007 Dalla Torre Florian Laboratory of Metal Physics and Technology, Department of Materials, ETH Zurich, Wolfgang-Pauli-Str. 10, 8093, Zurich, Switzerland aut Gazder Azdiar Department of Materials Engineering, Monash University, 3800, Clayton, Victoria, Australia aut Pereloma Elena Department of Materials Engineering, Monash University, 3800, Clayton, Victoria, Australia aut Davies Christopher Department of Materials Engineering, Monash University, 3800, Clayton, Victoria, Australia aut Journal of Materials Science Springer US; http://www.springer-ny.com 42/5(2007-03-01), 1622-1637 0022-2461 42:5<1622 2007 42 10853 https://doi.org/10.1007/s10853-006-1283-1 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10853-006-1283-1 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Dalla Torre Florian Laboratory of Metal Physics and Technology, Department of Materials, ETH Zurich, Wolfgang-Pauli-Str. 10, 8093, Zurich, Switzerland aut NATIONALLICENCE 700 1- Gazder Azdiar Department of Materials Engineering, Monash University, 3800, Clayton, Victoria, Australia aut NATIONALLICENCE 700 1- Pereloma Elena Department of Materials Engineering, Monash University, 3800, Clayton, Victoria, Australia aut NATIONALLICENCE 700 1- Davies Christopher Department of Materials Engineering, Monash University, 3800, Clayton, Victoria, Australia aut NATIONALLICENCE 773 0- Journal of Materials Science Springer US; http://www.springer-ny.com 42/5(2007-03-01), 1622-1637 0022-2461 42:5<1622 2007 42 10853 Metadata rights reserved Springer special CC-BY-NC licence nationallicence SWISSBIB 458127167 BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer