Microstructural and mechanical characterisation of 7075 aluminium alloy consolidated from a premixed powder by cold compaction and hot extrusion

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dc.contributor.author Jabbari Taleghani, M. A.
dc.contributor.author Ruiz Navas, Elisa María
dc.contributor.author Torralba Castello, José Manuel
dc.date.accessioned 2015-04-23T11:04:11Z
dc.date.available 2015-04-23T11:04:11Z
dc.date.issued 2014-03
dc.identifier.bibliographicCitation Materials & Design (2014). 55, 674-682.
dc.identifier.issn 0261-3069
dc.identifier.uri http://hdl.handle.net/10016/20476
dc.description.abstract The present work concerns the processing of 7075 Al alloy by cold compaction and hot extrusion of a pre-mixed powder. To this end, a premixed Al-Zn-Mg-Cu powder, Alumix 431D, was uniaxially cold pressed at 600 MPa into cylindrical compacts 25 mm in diameter and 15 mm thick. Subsequently, selected green compacts were subjected to either a delubrication or presintering heat treatment. Extrusion of the powder compacts was performed at 425 degrees C using an extrusion ratio of 25:1. No porosity was present in the microstructures of the extruded alloys. Heat treatment prior to extrusion had a great effect on the degree of alloy development in powder compacts and, as a direct consequence, remarkably affected the extrusion process and the as-extruded microstructures and mechanical properties of the processed materials. Hot extrusion caused banded structures for the alloys consolidated from the green and delubricated powder compacts. The alloy extruded from the presintered powder compact showed a fine, recrystallized microstructure which resulted in a superior combination of mechanical properties for the consolidated material.
dc.description.sponsorship The authors would like to thank the Comunidad de Madrid for their financial support of this work through the ESTRUMAT Grant #S2009/MAT-1585.
dc.format.extent 9 p.
dc.format.mimetype application/pdf
dc.language.iso eng
dc.publisher Elsevier
dc.relation.ispartof http://hdl.handle.net/10016/20871
dc.rights © 2013 Elsevier Ltd.
dc.subject.other Aluminium alloys
dc.subject.other Premixed powders
dc.subject.other Powder extrusion
dc.subject.other Microstructural characteristics Mechanical properties
dc.title Microstructural and mechanical characterisation of 7075 aluminium alloy consolidated from a premixed powder by cold compaction and hot extrusion
dc.type article
dc.description.status Publicado
dc.relation.publisherversion http://dx.doi.org/10.1016/j.matdes.2013.10.028
dc.subject.eciencia Materiales
dc.identifier.doi 10.1016/j.matdes.2013.10.028
dc.rights.accessRights openAccess
dc.relation.projectID Comunidad de Madrid. S2009/MAT-1585/ESTRUMAT
dc.type.version acceptedVersion
dc.identifier.publicationfirstpage 674
dc.identifier.publicationlastpage 682
dc.identifier.publicationtitle Materials in engineering
dc.identifier.publicationvolume 55
dc.identifier.uxxi AR/0000014497
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