About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
|
Aluminum Alloys, Characterization and Processing
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Presentation Title |
A New Recycled Al-Si-Mg Alloy for Sustainable Structural Die Casting Applications |
Author(s) |
Michael P. Moodispaw, Emre Cinkilic, Jianyue Zhang, Jiashi Miao, Alan A. Luo |
On-Site Speaker (Planned) |
Michael P. Moodispaw |
Abstract Scope |
Using secondary aluminum for structural components in the automotive industry is limited by high Fe contents which forms β-Al5FeSi phase significantly reducing ductility. A new secondary Al-Si-Mg alloy with high Fe content (0.44 wt.%) was developed for die casting. A designed Fe-to-Mn ratio of 2 successfully suppressed formation of β-Al5FeSi, by forming α-Al15(Fe,Mn)3Si2 phase with rounded or hexagonal morphology. A fine needle-like π-Al8FeMg3Si2 phase also formed within the eutectic regions. The new recycled alloy showed comparable mechanical properties in as-cast, T5, and T6 conditions to three major primary die cast alloys (≤ 0.2 wt.% Fe) with similar composition. High ductility from tensile elongation was achieved in as-cast condition. Tensile elongation improved after T6 treatment resulting from dissolution of π-Al8FeMg3Si2 phase, fragmentation of α-Al15(Fe,Mn)3Si2 and the spheroidization of Si. This new alloy provides a promising path for increasing usage of recycled aluminum with high Fe content in structural die castings. |
Proceedings Inclusion? |
Planned: Light Metals |
Keywords |
Aluminum, Mechanical Properties, Recycling and Secondary Recovery |