Identification of monoclinic [theta]-phase dispersoids in a 6061 aluminium alloy

Intermetallic dispersoids play an important role in controlling the 6xxx alloy series' grain distribution and increasing the alloy's toughness. The dispersoid distribution in a 6061 aluminium alloy (Al-Mg-Si) was analysed by transmission electron microscopy, selected area diffraction and e...

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Bibliographic Details
Published in:Philosophical magazine letters 2016-04, Vol.96 (4), p.121-131
Main Authors: Buchanan, Karl, Ribis, Joël, Garnier, Jérôme, Colas, Kimberly
Format: Article
Language:English
Subjects:
Alloys
Aluminum base alloys
Crystal structure
Diffraction
Dispersions
Spectroscopy
Transmission electron microscopy
X-rays
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Summary:Intermetallic dispersoids play an important role in controlling the 6xxx alloy series' grain distribution and increasing the alloy's toughness. The dispersoid distribution in a 6061 aluminium alloy (Al-Mg-Si) was analysed by transmission electron microscopy, selected area diffraction and energy-dispersive X-ray spectroscopy. The dispersoids had three unique crystal structures: simple cubic [Formula omitted.] , body-centred cubic [Formula omitted.] and monoclinic (C2/m). While the SC and BCC dispersoids have been well characterized in the literature, a detailed analysis of monoclinic dispersoids has not been presented. Therefore, the current work discusses the chemical composition, crystal structure and morphology of the monoclinic dispersoids.
ISSN:0950-0839
1362-3036
DOI:10.1080/09500839.2016.1162911