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ECAP with back pressure for optimum strength and ductility in aluminium alloy 6016. Part 2: mechanical properties and texture
journal contribution
posted on 2010-05-01, 00:00 authored by P W J Mckenzie, Rimma LapovokRimma LapovokThe simultaneous increase in strength and ductility of aluminium alloy 6016 processed by equal channel angular pressing (ECAP) was investigated. A complete study of microstructure, texture and mechanical properties after ECAP processing with and without back pressure was carried out for the O temper. The simultaneous increase in strength and ductility of AA6016-O with number of ECAP passes was explained by the use of back pressure during ECAP. A maximum ductility of ∼100% was obtained at the temperature of 200 °C and strain rate of 10−4 s−1, which is a significant improvement on the ductility exhibited by AA6016 (∼89%) after a conventional thermomechanical treatment at a much higher temperature of 500 °C. The mechanical behaviour was interpreted in the context of the textures developed in the material. A significant amount of texture rotation due to applied back pressure was found.
History
Journal
Acta materialiaVolume
58Issue
9Pagination
3212 - 3222Publisher
ElsevierLocation
Amsterdam, The NetherlandsPublisher DOI
ISSN
1359-6454eISSN
1873-2453Language
engPublication classification
C1.1 Refereed article in a scholarly journalCopyright notice
2010, Acta MaterialiaUsage metrics
Categories
Keywords
equal channel angular pressing (ECAP)ultrafine grained (UFG)aluminium alloy 6016tensile teststrain hardeningScience & TechnologyTechnologyMaterials Science, MultidisciplinaryMetallurgy & Metallurgical EngineeringMaterials ScienceCHANNEL ANGULAR EXTRUSIONSEVERE PLASTIC-DEFORMATIONMG-SI ALLOYSGRAIN-REFINEMENTPRECIPITATIONFORMABILITYSTABILITYEVOLUTIONMETALSSHEARMechanical EngineeringCondensed Matter Physics
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