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The influence of quench sensitivity on residual stresses in the aluminium alloys 7010 and 7075

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dc.contributor.author Robinson, J.S.
dc.contributor.author Tanner, David A.
dc.contributor.author Truman, C.E.
dc.contributor.author Paradowska, A.M
dc.contributor.author Wimpory, R.C.
dc.date.accessioned 2014-04-15T13:33:43Z
dc.date.available 2014-04-15T13:33:43Z
dc.date.issued 2012
dc.identifier.citation Robinson, JS,Tanne, DA,Truman, CE,Paradowska, AM,Wimpory, RC (2012) 'The influence of quench sensitivity on residual stresses in the aluminium alloys 7010 and 7075'. Materials Characterization, 65 :73-85. en_US
dc.identifier.uri http://hdl.handle.net/10344/3780
dc.description peer-reviewed en_US
dc.description.abstract The most critical stage in the heat treatment of high strength aluminium alloys is the rapid cooling necessary to form a supersaturated solid solution. A disadvantage of quenching is that the thermal gradients can be sufficient to cause inhomogeneous plastic deformation which in turn leads to the development of large residual stresses. Two 215 mm thick rectilinear forgings have been made from 7000 series alloys with widely different quench sensitivity to determine if solute loss in the form of precipitation during quenching can significantly affect residual stress magnitudes. The forgings were heat treated and immersion quenched using cold water to produce large magnitude residual stresses. The through thickness residual stresses were measured by neutron diffraction and incremental deep hole drilling. The distribution of residual stresses was found to be similar for both alloys varying from highly triaxial and tensile in the interior, to a state of biaxial compression in the surface. The 7010 forging exhibited larger tensile stresses in the interior. The microstructural variation from surface to centre for both forgings was determined using optical and transmission electron microscopy. These observations were used to confirm the origin of the hardness variation measured through the forging thickness. When the microstructural changes were accounted for in the through thickness lattice parameter, the residual stresses in the two forgings were found to be very similar. Solute loss in the 7075 forging appeared to have no significant effect on the residual stress magnitudes when compared to 7010. (C) 2012 Elsevier Inc. All rights reserved. en_US
dc.language.iso eng en_US
dc.publisher Elsevier en_US
dc.relation.ispartofseries Materials Characterization;65, pp. 73-85
dc.relation.uri http://dx.doi.org/10.1016/j.matchar.2012.01.005
dc.rights This is the author’s version of a work that was accepted for publication in Materials Characterization. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Materials Characterization, 2012, 65, pp. 73-85, http://dx.doi.org/10.1016/j.matchar.2012.01.005 en_US
dc.subject residual stress en_US
dc.subject neutron diffraction en_US
dc.subject incremental deep hole drilling (iDHD) en_US
dc.subject aluminium alloys en_US
dc.subject quench sensitivity en_US
dc.title The influence of quench sensitivity on residual stresses in the aluminium alloys 7010 and 7075 en_US
dc.type info:eu-repo/semantics/article en_US
dc.type.supercollection all_ul_research en_US
dc.type.supercollection ul_published_reviewed en_US
dc.date.updated 2013-11-29T16:45:26Z
dc.description.version Accepted
dc.contributor.sponsor ERC en_US
dc.relation.projectid COMPACT AST4-CT-2005-516078 en_US
dc.rights.accessrights info:eu-repo/semantics/openAccess en_US
dc.internal.rssid 1387782
dc.internal.copyrightchecked Yes
dc.description.status peer-reviewed


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