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Microstructure and corrosion evolution of additively manufactured aluminium alloy AA7075 as a function of ageing

Gharbi, Oumaima; Kairy, Shravan K; De Lima, Paula Roberta; Jiang, Derui; Nicklaus, Juan; Birbilis, Nick

Description

Additively manufactured high strength aluminium (Al) alloy AA7075 was prepared using selective laser melting (SLM). High strength Al-alloys prepared by SLM have not been widely studied to date. The evolution of microstructure and hardness, with the attendant corrosion, were investigated. Additively manufactured AA7075 was investigated both in the “as-produced” condition and as a function of artificial ageing. The microstructure of specimens prepared was studied using electron microscopy....[Show more]

dc.contributor.authorGharbi, Oumaima
dc.contributor.authorKairy, Shravan K
dc.contributor.authorDe Lima, Paula Roberta
dc.contributor.authorJiang, Derui
dc.contributor.authorNicklaus, Juan
dc.contributor.authorBirbilis, Nick
dc.date.accessioned2023-08-28T00:15:31Z
dc.date.available2023-08-28T00:15:31Z
dc.identifier.issn2397-2106
dc.identifier.urihttp://hdl.handle.net/1885/296888
dc.description.abstractAdditively manufactured high strength aluminium (Al) alloy AA7075 was prepared using selective laser melting (SLM). High strength Al-alloys prepared by SLM have not been widely studied to date. The evolution of microstructure and hardness, with the attendant corrosion, were investigated. Additively manufactured AA7075 was investigated both in the “as-produced” condition and as a function of artificial ageing. The microstructure of specimens prepared was studied using electron microscopy. Production of AA7075 by SLM generated a unique microstructure, which was altered by solutionising and further altered by artificial ageing—resulting in microstructures distinctive to that of wrought AA7075-T6. The electrochemical response of additively manufactured AA7075 was dependent on processing history, and unique to wrought AA7075-T6, whereby dissolution rates were generally lower for additively manufactured AA7075. Furthermore, immersion exposure testing followed by microscopy, indicated different corrosion morphology for additively manufactured AA7075, whereby resultant pit size was notably smaller, in contrast to wrought AA7075-T6.
dc.description.sponsorshipThe authors gratefully acknowledge support from Woodside Energy. All SEM and TEM images were collected at the Monash Centre for Electron Microscopy.
dc.format.mimetypeapplication/pdf
dc.language.isoen_AU
dc.publisherNature Publishing Group
dc.rights© 2019 The Author(s)
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.sourcenpj Materials Degradation
dc.titleMicrostructure and corrosion evolution of additively manufactured aluminium alloy AA7075 as a function of ageing
dc.typeJournal article
local.description.notesImported from ARIES
local.identifier.citationvolume3
dc.date.issued2019
local.identifier.absfor401600 - Materials engineering
local.identifier.ariespublicationa383154xPUB28967
local.publisher.urlhttps://www.nature.com/
local.type.statusPublished Version
local.contributor.affiliationGharbi, Oumaima, Sorbonne Universite
local.contributor.affiliationKairy, Shravan K, Monash University
local.contributor.affiliationDe Lima, Paula Roberta, Monash University
local.contributor.affiliationJiang, Derui, Monash University
local.contributor.affiliationNicklaus, Juan, Monash University
local.contributor.affiliationBirbilis, Nick, College of Engineering and Computer Science, ANU
local.bibliographicCitation.issue1
local.bibliographicCitation.startpage1
local.bibliographicCitation.lastpage11
local.identifier.doi10.1038/s41529-019-0101-6
dc.date.updated2022-07-24T08:20:13Z
local.identifier.scopusID2-s2.0-85084226099
dcterms.accessRightsOpen Access
dc.provenanceThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons. org/licenses/by/4.0/.
dc.rights.licenseCreative Commons Attribution License
CollectionsANU Research Publications

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