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Effect of Sc and Zr Additions on Dispersoid Microstructure and Mechanical Properties of Hot-Rolled AA5083

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Light Metals 2023 (TMS 2023)

Part of the book series: The Minerals, Metals & Materials Series ((MMMS))

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Abstract

5xxx aluminum alloys are traditionally considered non-heat-treatable. With the addition of Sc/Zr and multistep heat treatment, two kinds of dispersoids (AlMn and Al3(Sc,Zr)) were formed. The effect of Sc additions (0.08–0.43 wt.%) on dispersoid formation and mechanical properties of hot-rolled sheets was investigated. The results showed that tensile properties initially increased with increasing Sc addition. The yield strength (YS) and ultimate tensile strength (UTS) of the alloy with 0.16 wt.% Sc reached 295 and 411 MPa, respectively, showing improvements of 28% in YS and 8% in UTS compared to the base alloy. However, with a further increase of Sc, the tensile properties declined owing to the formation of a line/fan-shaped microstructure associated with discontinuous Al3(Sc,Zr) precipitation during solidification. The evolution of Al3(Sc,Zr) and AlMn dispersoids during heat treatment and hot rolling was characterized using scanning and transmission electron microscopies. Their influence on the mechanical properties of hot-rolled AA5083 alloys was discussed.

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Acknowledgements

The authors acknowledge the financial support from the Natural Sciences and Engineering Research Council of Canada (NSERC) and Rio Tinto Aluminum under the Grant No. CRDPJ 514651-17, through the Research Chair in Metallurgy of Aluminum Transformation at the University of Quebec at Chicoutimi.

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Authors and Affiliations

  1. Department of Applied Science, University of Quebec at Chicoutimi, Saguenay, QC, G7H 2B1, Canada

    Ahmed Y. Algendy, Kun Liu & X.-Grant Chen

  2. Arvida Research and Development Center, Rio Tinto Aluminium, Saguenay, QC, G7S 4K8, Canada

    Paul Rometsch & Nick Parson

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  1. Ahmed Y. Algendy
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  2. Kun Liu
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  4. Nick Parson
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  5. X.-Grant Chen
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Correspondence to X.-Grant Chen .

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  1. Kensington Technology Inc., Burlington, ON, Canada

    Stephan Broek

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Algendy, A.Y., Liu, K., Rometsch, P., Parson, N., Chen, XG. (2023). Effect of Sc and Zr Additions on Dispersoid Microstructure and Mechanical Properties of Hot-Rolled AA5083. In: Broek, S. (eds) Light Metals 2023. TMS 2023. The Minerals, Metals & Materials Series. Springer, Cham. https://doi.org/10.1007/978-3-031-22532-1_165

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