The generation of new high-angle boundaries in aluminium during hot torsion
作者： M.R. Barnett , F. Montheillet
DOI: 10.1016/S1359-6454(02)00048-4
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摘要: The crystallographic rotation field for deformation in torsion is such that it possible orientations close to stable rotate away from the orientation. A Taylor type model was used demonstrate this phenomenon has potential transform randomly generated low-angle boundaries into high-angle boundaries. After imposing an equivalent strain of 1.2, up 40% simulated displayed a disorientation excess 15°. These were characterised by axis parallel with sample radial direction. series hot tests carried out on 1050 aluminium seek evidence formed mechanism. number deformation-induced identified. Many these showed axes and senses similar those seen simulations. Between 10% 25% all boundary present samples twisted strains between 2 7 could be attributed
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