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dc.contributor.authorSunde, Jonas Kristoffer
dc.contributor.authorMarioara, Calin Daniel
dc.contributor.authorHolmestad, Randi
dc.identifier.citationMaterials Characterization. 2020, 160 .nb_NO
dc.description.abstractThis study concerns the effect of low Cu additions (<0.1 at.%) on the precipitate crystal structure evolution in three Al-Mg-Si(-Cu) alloys during overageing. The evolution was assessed through a combination of atomic resolution scanning transmission electron microscopy, scanning electron diffraction, and differential scanning calorimetry. It was found that relatively small changes in the Cu level and the Si:Mg ratio had significant effects on the resulting distribution of precipitate phases, their structural evolution, and their thermal stability. Two Si-rich alloys formed hybrid β′ phase and Q′ phase precipitates on overageing. A third Mg-rich alloy primarily formed L phase precipitates, which exhibited superior thermal stability. Three distinct Cu-containing sub-units that form the basis for all Al-Mg-Si-Cu precipitate phases were identified: the three-fold symmetric Q′/C and the β_Cu′ sub-units, in addition to a newly discovered C sub-unit. The formation of each sub-unit was discussed, and the atomic structures and connections to other precipitate phases in the Al-Mg-Si(-Cu) system were elaborated. The work presented provides new insights into the complex precipitation of Cu-added Al-Mg-Si alloys, with implications for material properties. The results obtained will be of importance in future alloy and process development, and are thought to be of high value in modelling work on the quaternary Al-Mg-Si-Cu system.nb_NO
dc.rightsNavngivelse 4.0 Internasjonal*
dc.titleThe effect of low Cu additions on precipitate crystal structures in overaged Al-Mg-Si(-Cu) alloysnb_NO
dc.typeJournal articlenb_NO
dc.typePeer reviewednb_NO
dc.source.journalMaterials Characterizationnb_NO
dc.relation.projectNorges forskningsråd: 249698nb_NO
dc.relation.projectNorges forskningsråd: 197405nb_NO
dc.relation.projectNorges forskningsråd: 247783nb_NO
dc.description.localcodeThis is an open access article distributed under the terms of the Creative Commons CC-BY license, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.nb_NO
cristin.unitnameInstitutt for fysikk

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Navngivelse 4.0 Internasjonal
Except where otherwise noted, this item's license is described as Navngivelse 4.0 Internasjonal