Effects of Annular Electromagnetic Stirring Melt Treatment on Microstructure and Mechanical Properties of 7050 Rheo-Casting

Abstract

The microstructure and mechanical properties of 7050 alloy rheo-castings after treated by Annular Electromagnetic Stirring (A-EMS) melt treatment were investigated. The results revealed that, under A-EMS, the refinement and homogeneity of the solidification structure could be improved greatly and the slurry was suitable for the following rheo-casting; and also the hot-cracking defects in the casting process were significantly alleviated, meanwhile, the strength and ductility of the alloy casting were found to be comparable to those of conventionally forged 7000 series alloys.

Tensile properties and microstructure of rheo-diecast 7075 alloy prepared by serpentine channel process

“…To meet this demand, a wide spectrum of routes and processes have been developed to prepare semisolid alloy slurries. Conventional preparation processes generally apply mechanical or electromagnetic stirring methods [2][3][4][5][6][7] . However, conventional preparation processes require specialized equipment so that they are complex and consume a substantial amount of energy, and the metal semisolid slurry or billet is more expensive.…”