About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
|
Aluminum Alloys, Characterization and Processing
|
Presentation Title |
Phase Equilibria in Al-Fe Alloys |
Author(s) |
Jozef Medved, Maja Voncina, Joze Arbeiter |
On-Site Speaker (Planned) |
Jozef Medved |
Abstract Scope |
Solidification of aluminium alloys is a complex process in which inhomogeneities form. Aluminium and iron form the equilibrium phase Al13Fe4 and various metastable intermetallic phases: Al6Fe, AlmFe, AlxFe. Four alloys were prepared and analysed in the laboratory: AlFe1, AlFe1Si0.1, and AlFe1Si0.5. Thermodynamic calculations, differential scanning calorimetry, electrical resistivity measurements, optical and scanning electron microscopy were used to analyse the alloys.
The results show that the addition of silicon to the AlFe1 alloy has a great influence on the distribution, amount and morphology of the phases formed during the solidification process. The addition of 0.1 wt.% Si reduces the amount of metastable Al6Fe phase. The transformation sequence was defined, starting with the dissolution of the metastable phase and the nucleation of the stable phase Al13Fe4. Due to the increased diffusion lengths of the iron atoms, the transformation takes place in the eutectic range after 4 hours of homogenization at 600 °C. |
Proceedings Inclusion? |
Planned: Light Metals |
Keywords |
Aluminum, Solidification, Characterization |