Synergistic enhancement of Al-Si7Mg alloy: Strengthening mechanical properties through combined electromagnetic agitation and AL-10%Ti refinement
G. Shaikshavali, Din Bandhu, Rashi Tyagi, E. Venugopal Goud, Daniel Amoako Darko

TL;DR
A new method combining electromagnetic agitation and a chemical refiner improves the strength and durability of an aluminum alloy used in cars and planes.
Contribution
The synergistic effect of electromagnetic agitation and Al-10%Ti refinement on Al-Si7Mg alloy microstructure and mechanical properties is experimentally demonstrated.
Findings
Combined treatment transformed coarse silicon phases into a fine, closed-grain structure.
Maximum tensile strength increased by 15% with 180 V EMF and Al-10%Ti treatment.
Hardness improved by 21% and elongation increased by 60% in treated samples.
Abstract
Al-Si7Mg alloy is widely used in automotive and aerospace applications due to its favorable strength-to-weight ratio and corrosion resistance. However, further enhancement of its mechanical properties remains a key challenge. While grain refinement through chemical additives is common, the synergistic effect of combining a chemical grain refiner with external electromagnetic agitation during solidification has not been fully explored. This study investigates the simultaneous application of Al-10%Ti grain refiner and electromagnetic agitation, via a custom electromagnetic force (EMF) coil, on the microstructure and mechanical properties of Al-Si7Mg alloy. The EMF voltage was varied from 0 to 220 V. Microstructural analysis revealed that the combined treatment effectively transformed coarse, acicular silicon phases into a fine, closed-grain structure. This refinement is attributed to the…
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Taxonomy
TopicsAluminum Alloy Microstructure Properties · Electromagnetic Effects on Materials · Microstructure and mechanical properties
