Strain-path effects on the evolution of microstructure and texture during the severe-plastic deformation of aluminum

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dc.contributor.authorSalem, A.A.
dc.contributor.authorLangdon, T.G.
dc.contributor.authorMcNelley, T.R.
dc.contributor.authorKalidindi, S.R.
dc.contributor.authorSemlatin, S.L.
dc.contributor.corporateNaval Postgraduate School (U.S.)
dc.contributor.departmentMechanical Engineeringen_US
dc.date.accessioned2017-08-02T19:10:17Z
dc.date.available2017-08-02T19:10:17Z
dc.date.issued2006
dc.descriptionThe article of record as published may be found at http://dx.doi.org/10.1007/BF02586120en_US
dc.description.abstractMicrostructure and texture evolution during the severe-plastic deformation (SPD) of unalloyed aluminum were investigated to establish the effect of processing route and purity level on grain refinement and subgrain formation. Two lots of aluminum with different purity levels (99.998 pct Al and 99 pct Al) were subjected to large plastic strains at room temperature via four different deformation processes: equal-channel angular extrusion (ECAE), sheet rolling, conventional conical-die extrusion, and uniaxial compression. Following deformation, microstructures and textures were determined using orientation-imaging microscopy. In commercial-purity aluminum, the various deformation routes yielded an ultrafine microstructure with a ;1.5-mm grain size, deduced to have been formed via a dynamic-recovery mechanism. For high-purity aluminum, on the other hand, the minimum grain size produced after the various routes was ;20 mm; the high fraction of high-angle grain boundaries (HAGBs) and the absence of subgrains/deformation bands in the final microstructure suggested the occurrence of discontinuous static recrystallization following the large plastic deformation at room temperature. The microstructure differences were underscored by the mechanical properties following four ECAE passes. The yield strength of commercial-purity aluminum quadrupled, whereas the high-purity aluminum showed only a minor increase relative to the annealed condition.en_US
dc.description.funderContract no. F33615-03-D-5801 (AF)en_US
dc.description.funderGrant no. DMR-02343331 (NSF)en_US
dc.description.funderFA9550-04-1-0018 (AFOSR)en_US
dc.description.sponsorshipAir Forceen_US
dc.description.sponsorshipNational Science Foundationen_US
dc.description.sponsorshipAir Force Office of Scientific Researchen_US
dc.format.extent13 p.en_US
dc.identifier.citationA.A. Salem, T.G. Langdon, T.R. McNelley, S.R. Kalidindi, S.L. Semiatin, "Strain-path effects on the evolution of microstructure and texture during the severe-plastic deformation of aluminum," Metallurgical and Materials Transactions A v.37A, (2006), pp. 2879-2891.en_US
dc.identifier.urihttps://hdl.handle.net/10945/55347
dc.publisherSpringeren_US
dc.rightsThis publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.en_US
dc.titleStrain-path effects on the evolution of microstructure and texture during the severe-plastic deformation of aluminumen_US
dc.typeArticleen_US
dspace.entity.typePublication
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