File(s) under permanent embargo
Composition dependent thermal stability and evolution of solute clusters in Al-Mg-Si analyzed using atom probe tomography
journal contribution
posted on 2018-04-01, 00:00 authored by A Poznak, Ross MarceauRoss Marceau, P G SandersMedium to high strength heat-treatable aluminum alloys of the 6000 series (Al-Mg-Si) have long been used for structural engineering applications. Their use in the automotive industry is growing rapidly, however the detrimental effects of room temperature storage (natural aging) on hardenability (artificial aging) hinders widespread applicability. Although numerous explanations have been proposed, there is no unified description of the mechanisms behind the negative effect. The current work builds on previous studies that identified a compositional (Mg:Si) dependence of the negative effect on hardening behavior, and finds a corresponding difference in the effect of room temperature clusters at artificial aging temperatures. Model alloys with different Mg:Si ratios were subjected to various thermal treatments including natural and artificial aging, and analyzed using atom probe tomography. This work represents the only atom probe tomography evidence to date showing increased thermal stability of naturally aged solute clusters in Mg-rich 6000 series alloys relative to Si-rich counterparts.
History
Journal
Materials science and engineering AVolume
721Pagination
47 - 60Publisher
ElsevierLocation
Amsterdam, The NetherlandsPublisher DOI
ISSN
0921-5093Language
engPublication classification
C1 Refereed article in a scholarly journalCopyright notice
2018, ElsevierUsage metrics
Keywords
Science & TechnologyTechnologyNanoscience & NanotechnologyMaterials Science, MultidisciplinaryMetallurgy & Metallurgical EngineeringScience & Technology - Other TopicsMaterials ScienceAluminum alloysSolute clusteringAge hardeningAtom probe tomography (APT)StrengtheningPRECIPITATION-HARDENING BEHAVIORCRYSTAL-STRUCTUREBETA''-PHASEVACANCY BEHAVIORAGING BEHAVIORCU ADDITIONSMG\/SI RATIOCO-CLUSTERSGP-ZONESALUMINUMMechanical Engineering
Licence
Exports
RefWorks
BibTeX
Ref. manager
Endnote
DataCite
NLM
DC