Abstract
The effect of processing an Al – 8 wt-% Si – 0.7 wt-% Fe melt by a unipolar pulsed electric current on the mechanical properties of castings obtained from it has been investigated. It has been established that the complex of properties has a maximum at j = 7 A cm−2, ν = 700 Hz. The study of the microstructure of castings obtained from the melt processed in this way, compared with the structure of castings from an untreated melt, showed that treatment with current leads to a partial replacement of large β-phase into the α-phase, and reduction in the size of the remaining β-phase. It is assumed that this effect is associated with a change in the structure of the melt, increasing supercooling.
Acknowledgements
This work was supported by the National Academy of Sciences of Ukraine under Grants # III-21-18-685 and # III-36-21-708.
Disclosure statement
No potential conflict of interest was reported by the author(s).