How Magnetic Stirring Affects the Structure of Al-18 wt.% Si Alloy
Author Information
Author(s): Zakaraia Dimah, András Roósz, Arnold Rónaföldi, Zsolt Veres, Yong-Cheng Lin
Primary Institution: University of Miskolc
Hypothesis
The study investigates how a rotating magnetic field and eutectic front velocity influence the microstructure of hypereutectic Al-18 wt.% Si alloy.
Conclusion
The application of a rotating magnetic field and increased front velocity during solidification significantly refines the eutectic structure of hypereutectic Al-Si alloys.
Supporting Evidence
- The study found that increasing front velocity leads to a finer eutectic structure.
- RMF application during solidification resulted in a significant reduction in interlamellar distances.
- Measurements indicated that the percentage of fine eutectic Si lamellas increased with higher front velocities.
- RMF induced a spiral flow that modified heat and mass transfer conditions within the melt.
Takeaway
This study shows that using a magnetic stir while cooling aluminum-silicon alloys makes them stronger and better by changing their tiny structures.
Methodology
The study used unidirectional solidification with varying front velocities and a rotating magnetic field to analyze the microstructure of Al-18 wt.% Si alloy.
Digital Object Identifier (DOI)
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