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MICROSTRUCTURAL EVOLUTION OF COLUMNAR GRAIN Al DURING COLD ROLLING II. Mircoscopic Subdivision |
WU Guilin; LIU Wei; A. Godfrey; LIU Qing |
Department of Materials Science and Engineering; Tsinghua University; Beijing 100084 |
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Cite this article:
WU Guilin; LIU Wei; A. Godfrey; LIU Qing. MICROSTRUCTURAL EVOLUTION OF COLUMNAR GRAIN Al DURING COLD ROLLING II. Mircoscopic Subdivision. Acta Metall Sin, 2004, 40(7): 709-715 .
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Abstract Columnar grain Al samples with 001uv0
orientations were cold rolled to reductions of
10%, 30% and 50%, respectively. The microscopic subdivision of the matrix bands in grains with different orientations was quantitatively characterized in detail
by using EBSP technique. It is found that all the grains are microscopically subdivided into dislocation cell blocks. But the microstructures of differently oriented grains are different after rolling. With
increasing strain, the misorientation angles across the dislocation boundaries increase, following a power relationship with an exponent of 2/3. By the Frank formula, the dislocations in the dislocation boundaries are mainly from the slip systems decided by the Schmid factors.
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Received: 24 July 2003
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