Abstract
The microstructure and texture evolution of an accumulative roll bonding (ARB) processed 4N-Cu with and without lubrication were compared in addition to the mechanical properties, in order to understand the effect of additional shear strain caused by the friction between the rolls and a sheet. Furthermore, subsequent annealing at 423 K, 448 K and 473 K was applied for 4N-Cu ARB processed with and without lubrication, and, softening was observed for all temperatures. The texture change due to the ARB process and subsequent annealing were discussed using {111} pole figures and ODF maps. As a result, a 45° rotated Cube texture around ND was formed by additional shear strain, whereas the typical fcc rolling texture was formed by ARB with lubrication. At higher ARB cycles of 4N-Cu, discontinuous recrystallization occurs due to its medium stacking fault energy. Cube orientation appeared in annealed-ARB processed 4N-Cu with lubrication, whereas no specific texture appeared in annealed-ARB processed 4N-Cu without lubrication
Fig. 6 {111} pole figures of ARB processed 4N-Cu: (a)–(d) are ARB 2c, (e)–(h) are ARB 4c, (i)–(l) are ARB 6c, and (m)–(p) are ARB 8c, respectively. The first column from the left is the results at quarter of ARB with lubrication. The second, third, and the fourth columns from the left are at centre, quarter, and surface of ARB without lubrication, respectively. (q) {111} pole figure of annealed (ARB 0c) 4N-Cu, and (r) ideal orientations of the rolling texture along β fibre, Cube and rotated Cube orientations.
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