Grain interaction effects in polycrystalline Cu

The Effect of a Grain Boundary on Deformation in an Aluminum Bicrystal with a Common Tensile Axis of [100]

“…The former rotation is caused by GB. The CRA map developed by Wert et al, which was originally applied to single-crystal deformation 18) and recently to polycrystal deformation, 8) is found to be an effective way for the identification of the affected zones formed as a result of the effect of GB in the orientation-controlled bicrystal specimen. In addition, the width and shape of the affected zones were not symmetrical with respect to GB.…”

“…For example, slip systems activated near GBs were examined using bicrystals through the stress transmission mechanism 1) and the slip transfer mechanism. 2,3) The electron backscatter diffraction (EBSD) technique has been employed in determining orientation distribution in, not only polycrystals, [4][5][6][7][8] but also single crystals. [9][10][11][12][13][14][15][16][17][18][19][20] The EBSD technique has the advantage that it enables precise and automatic measurement of many crystal orientations over a large area.…”

“…8) Crystal orientation maps, which provide the crystal rotation axes relative to the initial crystal orientations, revealed predominant coarse domains and special domains with different features. The interactions between the grain and the neighboring grains were remarkable in the special domains, which included layer-shaped patterns in orientation along boundary segments, lobe-shaped patterns in the vicinity of triple grain junctions and a plate-shaped pattern extending from near a triple grain junction.…”

The Relationship between Crystal Rotation Axis Orientation and Active Slip System in Pure Aluminum Tricrystal Deformed in Compression

“…[1][2][3][4][5] The crystal rotation axis (CRA) orientation at an EBSP data point is obtained by the comparison of crystal orientations before and after deformation. Since the CRA orientation changes depending on not only the kind of active slip system but also the ratio of their operations, the development of deformation structure by the slip operations can be understood in detail.…”

“…This prediction method has been applied to cold-rolled aluminum single crystals with various initial orientations, 1) aluminum single crystal deformed in tension 2,4) and polycrystalline copper deformed in tension. 5) Simplifying this method, Kashihara and Wert examined slip systems activated near a grain boundary in an aluminum bicrystal. 6) Active slip systems were estimated by comparing the CRA orientation and the h112i lattice rotation axis (LRA) orientations.…”