The generation of new high angle boundaries during the hot torsional deformation of aluminium

Barnett, M.R and Montheillet, F. 2001, The generation of new high angle boundaries during the hot torsional deformation of aluminium, in Recrystallization and Grain Growth. Proceedings of the 1st Joint International Conference., Springer-Verlag, Aachen, Germany, pp. 869-874.

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Title The generation of new high angle boundaries during the hot torsional deformation of aluminium
Author(s) Barnett, M.R
Montheillet, F.
Conference name Joint International Conference on Recrystallization and Grain Growth (1st : 2001 : RWTH Aachen, Germany)
Conference location RWTH Aachen, Germany
Conference dates 27-31 Aug. 2001
Title of proceedings Recrystallization and Grain Growth. Proceedings of the 1st Joint International Conference.
Editor(s) Gottstein, Gunter
Molodov, Dmitri
Publication date 2001
Start page 869
End page 874
Publisher Springer-Verlag
Place of publication Aachen, Germany
Keyword(s) Aluminium
Hot working
Torsion
Microstructure
Deformation structure
Summary 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.
Notes Also published in : Acta materialia, 2002, vol. 50, no. 9, pp.2285-2296.
ISBN 3540418377
Language eng
Field of Research 091207 Metals and Alloy Materials
Socio Economic Objective 970109 Expanding Knowledge in Engineering
HERDC Research category E2 Full written paper - non-refereed / Abstract reviewed
Copyright notice ©2001, Springer-Verlag
Persistent URL http://hdl.handle.net/10536/DRO/DU:30013718

Document type: Conference Paper
Collection: School of Engineering and Technology
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