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Quantitative atom probe analysis of nanostructure containing clusters and precipitates with multiple length scales
journal contribution
posted on 2011-01-06, 00:00 authored by Ross MarceauRoss Marceau, L T Stephenson, C R Hutchinson, S P RingerA model Al-3Cu-(0.05 Sn) (wt%) alloy containing a bimodal distribution of relatively shear-resistant y0 precipitates and shearable GP zones is considered in this study. It has recently been shown that the addition of the GP zones to such microstructures can lead to significant increases in strength without a decrease in the uniform elongation. In this study, atom probe tomography (APT) has been used to quantitatively characterise the evolution of the GP zones and the solute distribution in the bimodal microstructure as a function of applied plastic strain. Recent nuclear magnetic resonance (NMR) analysis has clearly shown strain-induced dissolution of the GP zones, which is supported by the current APT data with additional spatial information. There is significant repartitioning of Cu from the GP zones into the solid solution during deformation. A new approach for cluster finding in APT data has been used to quantitatively characterise the evolution of the sizes and shapes of the Cu containing features in the solid solution solute as a function of applied strain.
History
Journal
UltramicroscopyVolume
111Issue
6Pagination
738 - 742Publisher
ElsevierLocation
Amsterdam, The NetherlandsPublisher DOI
ISSN
0304-3991eISSN
1879-2723Language
engPublication classification
C1.1 Refereed article in a scholarly journalCopyright notice
2010, ElsevierUsage metrics
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