Deformation Structure and Crystal Orientation of Copper Single Crystals Deformed by Equal Channel Angular Pressing

2003 ◽  
Vol 426-432 ◽  
pp. 2795-2800 ◽  
Author(s):  
Hiroyuki Miyamoto ◽  
Uwe Erb ◽  
Tetsuo Koyama ◽  
Takura Mimaki ◽  
Alexei Vinogradov ◽  
...  
Keyword(s):  
Single Crystals ◽  
Equal Channel Angular Pressing ◽  
Crystal Orientation ◽  
Deformation Structure ◽  
Angular Pressing ◽  
Copper Single Crystals

Microstructures of Aluminum and Copper Single Crystals Processed by Equal-Channel Angular Pressing

2010 ◽  
Vol 638-642 ◽  
pp. 1946-1951 ◽  
Author(s):  
Minoru Furukawa ◽  
Z. Horita ◽  
Terence G. Langdon
Keyword(s):  
Single Crystals ◽  
Equal Channel Angular Pressing ◽  
Orientation Imaging Microscopy ◽  
Orientation Imaging ◽  
Angular Pressing ◽  
Transmission Electron ◽  
Shear Theory ◽  
High Purity Aluminum ◽  
Copper Single Crystals ◽  
Shear Factors

High purity aluminum (Al) and copper (Cu) single crystals of different crystallographic orientations were processed for one pass by equal-channel angular pressing (ECAP). The deformed structures were examined using orientation imaging microscopy (OIM) and transmission electron microscopy (TEM). This paper examines the experimental results in terms of the values of the shear factors based on simple shear theory.

The Effect of the Initial Orientation on Microstructure Development of Copper Single Crystals Subjected to Equal-Channel Angular Pressing

2006 ◽  
Vol 503-504 ◽  
pp. 799-804 ◽  
Author(s):  
Hiroyuki Miyamoto ◽  
J. Fushimi ◽  
Takura Mimaki ◽  
Alexei Vinogradov ◽  
Satoshi Hashimoto
Keyword(s):  
Single Crystals ◽  
Equal Channel Angular Pressing ◽  
Crystallographic Orientation ◽  
Shear Bands ◽  
Initial Orientation ◽  
Processing Route ◽  
Microstructure Development ◽  
Angular Pressing ◽  
Copper Single Crystals ◽  
Heterogeneous Deformation

Copper single crystals were subjected to equal-channel angular pressing (ECAP) via the so-called route A and Bc, in order to examine the influence of initial crystallographic orientation and processing route on microstructure development and grain fragmentation. Microstructural changes were examined by transmission electron microscopy (TEM). The pressing via the route Bc resulted in finer microstructure for all orientations in terms of grain size, equiaxiality and orientation scattering after four passes. Effect of initial crystallographic orientation on the grain refinement was also recognized, and it might be attributed to heterogeneous deformation such as shear bands, whose formation is strongly orientation dependent. After eight passes, however, the effect of processing route and initial orientation cannot be recognized.

Microstructure and texture development of copper single crystals deformed by equal-channel angular pressing

2004 ◽  
Vol 84 (4) ◽  
pp. 235-243 ◽  
Author(s):  
H. Miyamoto ◽  
U. Erb ◽  
T. Koyama ◽  
T. Mimaki ◽  
A. Vinogradov ◽  
...  
Keyword(s):  
Single Crystals ◽  
Equal Channel Angular Pressing ◽  
Texture Development ◽  
Angular Pressing ◽  
Copper Single Crystals

Application of Equal-Channel Angular Pressing to Aluminum and Copper Single Crystals

2007 ◽  
Vol 539-543 ◽  
pp. 2853-2858 ◽  
Author(s):  
Minoru Furukawa ◽  
Z. Horita ◽  
Terence G. Langdon
Keyword(s):  
Electron Microscopy ◽  
Single Crystals ◽  
Equal Channel Angular Pressing ◽  
Orientation Imaging Microscopy ◽  
Orientation Imaging ◽  
Angular Pressing ◽  
Transmission Electron ◽  
High Purity Aluminum ◽  
Copper Single Crystals ◽  
Crystallographic Orientations

This paper describes experiments in which high purity aluminum (Al) and copper (Cu) single crystals of different crystallographic orientations were processed for one pass by equal-channel angular pressing (ECAP). The deformed structures were examined using optical microscopy (OM), orientation imaging microscopy (OIM) and transmission electron microscopy (TEM). The results for Al single crystals are compared with those for Cu single crystals.

An Investigation of Deformation in Copper Single Crystals Using Equal-Channel Angular Pressing

2006 ◽  
Vol 503-504 ◽  
pp. 113-118 ◽  
Author(s):  
Minoru Furukawa ◽  
Yukihide Fukuda ◽  
Keiichiro Oh-ishi ◽  
Z. Horita ◽  
Terence G. Langdon
Keyword(s):  
Single Crystals ◽  
Equal Channel Angular Pressing ◽  
Slip Plane ◽  
Orientation Imaging Microscopy ◽  
Shear Plane ◽  
Initial Orientation ◽  
Shear Direction ◽  
Slip Direction ◽  
Angular Pressing ◽  
Copper Single Crystals

This paper describes experiments in which high purity copper single crystals of two different orientations were processed for one pass by equal-channel angular pressing (ECAP) and the deformed structures were examined using optical microscopy (OM), orientation imaging microscopy (OIM) and transmission electron microscopy (TEM). The first single crystal (0° specimen) was oriented within the entrance channel of the die so that the {111} slip plane and the <110> slip direction were parallel to the theoretical shear plane and shear direction, respectively. The second crystal (20° specimen) was oriented with the {111} slip plane and the <110> slip direction rotated by 20° in a clockwise sense from the theoretical shear plane and shear direction, respectively. For the 0° specimen, after passing through the shear plane there were two crystallographic orientations representing the initial orientation and an orientation rotated by 60° in a counter-clockwise sense from the initial orientation. For the 20° specimen, there was an orientation rotated by 20° in a counter-clockwise sense from the initial orientation after passing through the shear plane.

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