Effect of A-EMS above Liquidus Temperature on Structure Refinement of Al-11%Zn-3%Mg-1%Cu-0.13%Zr Alloy

Abstract

The application of Annular Electromagnetic Stirring (A-EMS) for production of high-quality slurry has been examined. Al-11%Zn-3%Mg-1%Cu-0.13%Zr alloy was used to investigate the effect of A-EMS at various temperatures above liquidus on structure refinement. The results indicate that the grain size was reduced greatly and the homogeneous structure was achieved. Instead of the case in tradition, the nucleation particles gradually formed and the enhanced grain refining efficiency can be mainly attributed to an instantaneous nucleation of numerous heterogeneous nucleation of Al3Zr in the superheating melt under A-EMS.

The Influence of Inter-Cooling and Electromagnetic Stirring above Liquidus on the Formation of Primary Al3Zr and Grain Refinement in an Al-0.2%Zr Alloy

“…Eskin et al studied ultrasonic treatment of the Al-Ti master alloy over different temperature ranges and observed primary Al 3 Ti particles at a quenching temperature above the liquidus temperature after UST [19]. Guan et al studied the effect of inter-cooling annular electromagnetic stirring (IC-AEMS for short) above the liquidus on the Al-Zn-Mg-Cu alloy with a high elements content, and the solidification structure was greatly refined [20].…”