Evaluation of Texture and Grain Size of Nanograined Copper Produced by the Accumulative Roll Bonding Process

Abstract

Pure copper was intensely deformed by accumulative roll bonding (ARB) for up to eight cycles at ambient temperature. X-ray diffraction (XRD) was used to evaluate the grain size and texture during the ARB process. The Williamson-Hall method was used to calculate the grain size from the XRD patterns, which was about 30 nm after eight cycles of the ARB process. Texture analysis revealed cube texture in the initial copper. The intensity of cube texture decreased after one cycle of the ARB process. The texture of two-cycle ARB-processed sample was a transition texture, from cube to shear texture (rotated cube) that appeared after two cycles of ARB process in the subsurface regions. This shear texture developed due to shear deformation induced by the high level of friction between the rolls and the sheet. Moreover, shear texture was replaced by recrystallization texture (cube component) by annealing the ARB-processed samples. This result was caused by preferential growth of cube grains.

Texture development in Al/Al2O3 MMCs produced by anodizing and ARB processes

“…The first parameter is the location of thickness. In agreement with previous researches [11][12][13][16][17][18], the texture measurements of near the surface caused the shear texture such as Rotated Cube component to develop. In the present work, the texture was measured in an area of 0.1 mm under the surface of the strips.…”

“…In other words, the distribution of texture through the thickness may be complex. The ARB-processed materials have quite complicated combinations of plane strain deformation and shear deformation, depending on two parameters [18]. The first parameter is the location of thickness.…”

Hardness and microstructure homogeneity of pure copper processed by accumulative back extrusion

“…This was the lowest average grain size achieved in one pass ABEed pure copper. It has been reported that a single pass of accumulative roll-bonding (ARB) or equal channel angular pressing (ECAP) results in grain sizes comparable to the present results [22,23]. However a more significant grain refinement down to nanometer scale has been obtained after HPT processing of pure copper [24].…”

Microstructure and Texture Development in Al–3%Brass Composite Produced through ARB

“…The number pass of texture transition during ARB process depends on different parameters such as stacking fault energy and particles in the matrix. For example, the 2nd, 4th, 3rd, and 1st passes reported for transition during ARB process for copper, AA1100 aluminum, conventional IF steel and nano‐composite IF steel, respectively . It was mentioned that presence of particles accelerate the recrystallization during ARB process, as a result, transition took place more rapidly in composite samples.…”