About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
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Scandium Extraction and Use in Aluminum Alloys
|
Presentation Title |
Effect of Sc and Zr Additions on Dispersoid Microstructure and Mechanical Properties of Hot-rolled AA5083 Alloys |
Author(s) |
Ahmed Y. Algendy, Kun Liu, Paul Rometsch, Nick Parson, X.-Grant Chen |
On-Site Speaker (Planned) |
X.-Grant Chen |
Abstract Scope |
5xxx aluminum alloys are traditionally considered non-heat-treatable. With the addition of Sc/Zr, two kinds of dispersoids (Mn-dispersoids and Al3(Sc,Zr)) were formed during heat treatment. The effect of Sc additions (0.08–0.43 wt.%) on the dispersoids 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 an alloy with 0.16 wt.% Sc reached 295 and 411 MPa, respectively, showing improvements of 30% in YS and 11.8% 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 Mn-dispersoids during heat treatment and hot rolling was characterized using transmission electron microscopy. Their influence on the mechanical properties of hot-rolled AA5083 alloys was discussed. |
Proceedings Inclusion? |
Planned: Light Metals |
Keywords |
Aluminum, Characterization, Mechanical Properties |