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The generation of new high angle boundaries during the hot torsional deformation of aluminium
conference contributionposted on 2001-01-01, 00:00 authored by Matthew BarnettMatthew Barnett, F Montheillet
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.
EventJoint International Conference on Recrystallization and Grain Growth (1st : 2001 : RWTH Aachen, Germany)
Pagination869 - 874
LocationRWTH Aachen, Germany
Place of publicationAachen, Germany
NotesAlso published in : Acta materialia, 2002, vol. 50, no. 9, pp.2285-2296.
Publication classificationE2 Full written paper - non-refereed / Abstract reviewed
Copyright notice2001, Springer-Verlag
Editor/Contributor(s)G Gottstein, D Molodov
Title of proceedingsRecrystallization and Grain Growth. Proceedings of the 1st Joint International Conference.
Read the peer-reviewed publication
AluminiumHot workingTorsionMicrostructureDeformation structureScience & TechnologyPhysical SciencesTechnologyThermodynamicsMaterials Science, MultidisciplinaryMetallurgy & Metallurgical EngineeringPhysics, Condensed MatterMaterials SciencePhysicshot deformationcontinuous dynamic recrystallizationRECRYSTALLIZATIONTEXTURES