The generation of new high-angle boundaries in aluminium during hot torsion
Data(s) |
01/01/2002
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Resumo |
The crystallographic rotation field for deformation in torsion is such that it is possible for orientations close to stable orientations to rotate away from the stable orientation. A Taylor type model was used to demonstrate that this phenomenon has the potential to transform randomly generated low-angle boundaries into high-angle boundaries. After imposing an equivalent strain of 1.2, up to 40% of the simulated boundaries displayed a disorientation in excess of 15°. These high-angle boundaries were characterised by a disorientation axis close to parallel with the sample radial direction. A series of hot torsion tests was carried out on 1050 aluminium to seek evidence for boundaries formed by this mechanism. A number of deformation-induced high-angle boundaries were identified. Many of these boundaries showed disorientation axes and rotation senses similar to those seen in the simulations. Between 10% and 25% of all the high-angle boundary present in samples twisted to equivalent strains between 2 and 7 could be attributed to the present mechanism. |
Identificador | |
Idioma(s) |
eng |
Publicador |
Elsevier Science |
Relação |
http://dro.deakin.edu.au/eserv/DU:30001776/barnett-thegeneration-2002.pdf http://www.sciencedirect.com/science?_ob=MImg http://www.sciencedirect.com/science?_ob=MImg |
Direitos |
2002, Elsevier Science |
Palavras-Chave | #aluminium #hot working #torsion #microstructure #deformation structure |
Tipo |
Journal Article |