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2023 | OriginalPaper | Chapter

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

Authors : Ahmed Y. Algendy, Kun Liu, Paul Rometsch, Nick Parson, X.-Grant Chen

Published in: Light Metals 2023

Publisher: Springer Nature Switzerland

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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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previous chapter Efficiency of Sc for Strengthening and Formability Improvement of 5XXX BIW Sheets

next chapter Effect of Cooling Rate on W-Phase Formation in Al-Cu-Sc Alloys

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Title: Effect of Sc and Zr Additions on Dispersoid Microstructure and Mechanical Properties of Hot-Rolled AA5083
Authors: Ahmed Y. Algendy
Kun Liu
Paul Rometsch
Nick Parson
X.-Grant Chen
Publisher: Springer Nature Switzerland
Book: Light Metals 2023
Print ISBN: 978-3-031-22531-4

Electronic ISBN: 978-3-031-22532-1

Copyright Year: 2023
DOI: https://doi.org/10.1007/978-3-031-22532-1_165

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