Development of Nano-Grains in Deoxidized Low-Phosphorous Copper by Accumulative Roll-Bonding Process

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Abstract:

A deoxidized low-phosphorous copper (DLPC) was processed by accumulative roll-bonding (ARB). The evolution of nano-grains in DLPC with the ARB was investigated by TEM and EBSD analysis. TEM observation revealed that the ultrafine grains equiaxed to ND and elongated to RD developed in the sample after 8-cycle ARB. In addition, it was found that the mean spacing of grain boundaries, which was 45 m in initial material, reduced to 5.2 m after 1 cycle, 650 nm after 3 cycles, 510 nm after 5 cycles, and then surprisingly 190 nm after 8 cycles, respectively. In addition, the fraction of high-angle boundaries in the sample after 1-cycle ARB was 0.22, but it after 8-cycle ARB was surprisingly 0.70. Therefore, it is concluded that the ARB is a very effective process for development of ultrafine grains in case of DLPC as well.
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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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