dc.contributor.author | Ehlers, Flemming J H | |
dc.contributor.author | Wenner, Sigurd | |
dc.contributor.author | Andersen, Sigmund Jarle | |
dc.contributor.author | Marioara, Calin Daniel | |
dc.contributor.author | Lefebvre, Williams | |
dc.contributor.author | Boothroyd, Chris | |
dc.contributor.author | Holmestad, Randi | |
dc.date.accessioned | 2017-11-06T13:28:38Z | |
dc.date.available | 2017-11-06T13:28:38Z | |
dc.date.created | 2014-07-07T22:49:00Z | |
dc.date.issued | 2014 | |
dc.identifier.citation | Journal of Materials Science. 2014, 49 (18), 6413-6426. | nb_NO |
dc.identifier.issn | 0022-2461 | |
dc.identifier.uri | http://hdl.handle.net/11250/2464295 | |
dc.description.abstract | In this work, we seek to elucidate a common stabilization principle for the metastable and equilibrium phases of the Al–Mg–Si–Cu alloy system, through combined experimental and theoretical studies. We examine the structurally known well-ordered Al–Mg–Si–Cu alloy metastable precipitates along with experimentally observed disordered phases, using high angle annular dark field scanning transmission electron microscopy. A small set of local geometries is found to fully explain all structures. Density functional theory based calculations have been carried out on a larger set of structures, all fully constructed by the same local geometries. The results reveal that experimentally reported and hypothetical Cu-free phases from the set are practically indistinguishable with regard to formation enthalpy and composition. This strongly supports a connection of the geometries with a bulk phase stabilization principle. We relate our findings to the Si network substructure commonly observed in all Mg–Al–Si(–Cu) metastable precipitates, showing how this structure can be regarded as a direct consequence of the local geometries. Further, our proposed phase stabilization principle clearly rests on the importance of metal-Si interactions. Close links to the Al–Mg–Si precipitation sequence are proposed. | nb_NO |
dc.language.iso | eng | nb_NO |
dc.publisher | Springer Verlag | nb_NO |
dc.title | Phase stabilization principle and precipitate-host lattice influences for Al-Mg-Si-Cu alloy precipitates | nb_NO |
dc.type | Journal article | nb_NO |
dc.description.version | submittedVersion | nb_NO |
dc.source.pagenumber | 6413-6426 | nb_NO |
dc.source.volume | 49 | nb_NO |
dc.source.journal | Journal of Materials Science | nb_NO |
dc.source.issue | 18 | nb_NO |
dc.identifier.doi | 10.1007/s10853-014-8371-4 | |
dc.identifier.cristin | 1142641 | |
dc.relation.project | Notur/NorStore: NN8068K | nb_NO |
dc.relation.project | Norges forskningsråd: 205353 | nb_NO |
dc.description.localcode | This is a submitted manuscript of an article published by Springer Verlag in Journal of Materials Science, 17 June 2014 | nb_NO |
cristin.unitcode | 194,66,20,0 | |
cristin.unitname | Institutt for fysikk | |
cristin.ispublished | true | |
cristin.fulltext | preprint | |
cristin.qualitycode | 1 | |