About this Abstract |
Meeting |
2020 TMS Annual Meeting & Exhibition
|
Symposium
|
Aluminum Alloys, Processing and Characterization
|
Presentation Title |
Effects of Sc and Y on the As-cast Microstructure of AA6086 |
Author(s) |
Sandi Zist, Varuzan Kevorkijan, Matej Steinacher, Franc Zupanic, Irena Paulin, Matjaz Godec |
On-Site Speaker (Planned) |
Matjaz Godec |
Abstract Scope |
AA6086 is a novel Al-Mg-Si alloy that contains 0.15–0.25 wt. % Zr and more Si and Cu than AA 6082. This new alloy is distinguished by its improved tensile strength and hardness and useful ductility. Additions of rare-earth elements can further improve these properties. In order to clarify their influence, we prepared several alloys containing either individual or combined additions of Sc and Y in the range 0.21.0 % Sc, 0.11.0 % Y . The alloys were melted and then cast into a copper mould. The alloys were investigated by optical microscopy, SEM with EDS, and XRD. There are several microstructural constituents in the as-cast state. Larger additions of Sc (1 wt. %) strongly increased the grain size number, up to 7.5 G. In the centre of the crystal grains were Al3(Sc,Zr) particles, which are effective grain refiners. The grain-refinement effects were minor when we used Y. |
Proceedings Inclusion? |
Planned: Light Metals |