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Tensile deformation of a ultrafine-grained aluminium alloy: micro shear banding and grain boundary sliding
journal contribution
posted on 2008-06-01, 00:00 authored by Ilchat Sabirov, Y Estrin, Matthew BarnettMatthew Barnett, Ilana Timokhina, Peter HodgsonPeter HodgsonThis work investigates the relationship between the strain rate and the ductility and the underlying deformation mechanisms in an ultrafine-grained Al6082 alloy. At room temperature the uniform elongation of the material exhibits a marked increase with decreasing strain rate. This effect is related to the activation of micro shear banding, which is controlled by grain boundary sliding. The contribution of these mechanisms to uniform elongation is estimated. It is proposed that the grain boundary sliding suppresses the transformation of micro shear bands into macro shear bands. The activity of other deformation mechanisms during plastic deformation of the ultrafine-grained material is also discussed.
History
Journal
Acta MaterialiaVolume
56Issue
10Pagination
2223 - 2230Publisher
PergamonLocation
Oxford, EnglandPublisher DOI
ISSN
1359-6454eISSN
1873-2453Language
engPublication classification
C1 Refereed article in a scholarly journalCopyright notice
2008, ElsevierUsage metrics
Categories
Keywords
aluminium alloyequal channel angular pressinguniform elongationshear bandsgrain boundary slidingScience & TechnologyTechnologyMaterials Science, MultidisciplinaryMetallurgy & Metallurgical EngineeringMaterials ScienceSEVERE PLASTIC-DEFORMATIONHIGH-PRESSURE TORSIONNANOSTRUCTURED METALNANOCRYSTALLINE MATERIALSSTRAIN-RATEIN-SITUDUCTILITYBEHAVIORSIZENICKELMechanical EngineeringCondensed Matter Physics
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