Macrosegmentation and strain hardening stages in copper single crystals under compression /D. V. Lychagin, S. Y. Tarasov, A. V. Chumaevskii, E.A. Alfyorova

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Другой Автор
Lychagin, Dmitry V.
Chumaevskii, A. V.
Alfyorova, Ekaterina A.
Tarasov, S. Yu.
Источник
International journal of plasticity 2015 Vol. 69. P. 36-53
Аннотация
The surface deformation-induced pattern (relief) of copper single crystals with the orientation of the compression axis along [111] has been investigated by means of optical, scanning electron and atomic force microscopy. The misorientations between both macroscopic and mesoscopic areas in [111]-single crystals have been determined using the electron back scattering diffraction (EBSD) technique. The macroscopic reorientation has been revealed to rotate the crystalline lattice around the [110] axis. The single crystal has been divided into five macrosegments with their misorientations distributed along the compression axis in a manner that the deformation axis sequentially coincided with the crystallographic directions in the order [111]-[221]-[773]-[110]. Shear by unloaded plane (111) has been observed. The macrolevel deformation up to 25% has been developing as follows: shear by octahedral planes e development of macrobands e reorientation of the central zones e shear by unloaded octahedral plane in the reoriented zones. The steps of this sequence corresponded to the stages of the stress-strain curves.
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$a The surface deformation-induced pattern (relief) of copper single crystals with the orientation of the compression axis along [111] has been investigated by means of optical, scanning electron and atomic force microscopy. The misorientations between both macroscopic and mesoscopic areas in [111]-single crystals have been determined using the electron back scattering diffraction (EBSD) technique. The macroscopic reorientation has been revealed to rotate the crystalline lattice around the [110] axis. The single crystal has been divided into five macrosegments with their misorientations distributed along the compression axis in a manner that the deformation axis sequentially coincided with the crystallographic directions in the order [111]-[221]-[773]-[110]. Shear by unloaded plane (111) has been observed. The macrolevel deformation up to 25% has been developing as follows: shear by octahedral planes e development of macrobands e reorientation of the central zones e shear by unloaded octahedral plane in the reoriented zones. The steps of this sequence corresponded to the stages of the stress-strain curves.
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Резюме
The surface deformation-induced pattern (relief) of copper single crystals with the orientation of the compression axis along [111] has been investigated by means of optical, scanning electron and atomic force microscopy. The misorientations between both macroscopic and mesoscopic areas in [111]-single crystals have been determined using the electron back scattering diffraction (EBSD) technique. The macroscopic reorientation has been revealed to rotate the crystalline lattice around the [110] axis. The single crystal has been divided into five macrosegments with their misorientations distributed along the compression axis in a manner that the deformation axis sequentially coincided with the crystallographic directions in the order [111]-[221]-[773]-[110]. Shear by unloaded plane (111) has been observed. The macrolevel deformation up to 25% has been developing as follows: shear by octahedral planes e development of macrobands e reorientation of the central zones e shear by unloaded octahedral plane in the reoriented zones. The steps of this sequence corresponded to the stages of the stress-strain curves.