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Journal of Materials Science
Erschienen in: Journal of Materials Science 16/2016

18.05.2016 | Original Paper

Formation mechanisms and evolution of precipitate-free zones at grain boundaries in an Al–Cu–Mg–Mn alloy during homogenisation

verfasst von: Y. Q. Chen, S. P. Pan, S. W. Tang, W. H. Liu, C. P. Tang, F. Y. Xu

Erschienen in: Journal of Materials Science | Ausgabe 16/2016

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Abstract

Solute and vacancy depletion have long been investigated to reveal the formation mechanism of grain boundary precipitate-free zones (GB-PFZ) during ageing, yet there is no conclusive explanation due to the simultaneous appearance of the two in GB-PFZ. In this study, the evolution of GB-PFZs and solute distributions in the vicinity of grain boundaries (GBs) were studied during the homogenisation of an Al–Cu–Mg–Mn alloy using transmission electron microscopy, high-angle annular dark field scanning transmission electron microscopy, and energy-dispersive X-ray spectroscopy. Results indicated that the evolution of GB-PFZ during homogenisation can be divided into the following three stages: Stage I, formation and recession of GB-PFZ; Stage II, absence of GB-PFZ, and Stage III, the reappearance and broadening of GB-PFZ. The results also revealed that the GB-PFZ in Stage I is totally devoid of solute depletion and its formation can be attributed to vacancy depletion alone. The GB-PFZ at Stage III solely caused by solute depletion and excludes vacancy depletion.
Vorheriger Artikel Effect of thermal history on nucleation and crystallization of poly(lactic acid)
Nächster Artikel Design and preparation of easily recycled Ag2WO4@ZnO@Fe3O4 ternary nanocomposites and their highly efficient degradation of antibiotics

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Metadaten
Titel
Formation mechanisms and evolution of precipitate-free zones at grain boundaries in an Al–Cu–Mg–Mn alloy during homogenisation
verfasst von
Y. Q. Chen
S. P. Pan
S. W. Tang
W. H. Liu
C. P. Tang
F. Y. Xu
Publikationsdatum
18.05.2016
Verlag
Springer US
Erschienen in
Journal of Materials Science / Ausgabe 16/2016
Print ISSN: 0022-2461
Elektronische ISSN: 1573-4803
DOI
https://doi.org/10.1007/s10853-016-0062-x

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