Preparation of AlSi9Mg Alloy Semi-Solid Slurry by Electromagnetic Stirring Combined with Mechanical Vibration

Abstract

The electromagnetic stirring combined with mechanical stirring (EMSCMV) method was developed for preparing the AlSi9Mg alloy semi-solid slurry. The experimental results demonstrate that, the preparation of semi-solid slurry by EMSCMV is sufficient to obtain fine microstructure of billet. The primary -Al particles are small, spherical and uniform throughout the microstructure. When increasing the stirring power and the vibrating power, the size of primary -Al particles decreases while the shape factor increases, and its distribution is more uniform. The fine microstructure of billet prepared by EMSCMV was obtained at the stirring power of 2.0~2.4 kW and vibrating power of 0.8 kW.

Aluminiums for thixoforging and preparatory conditions and parameters necessary before forming: A review

“…The overheated molten alloy is brought to a semi-solid temperature via the liquid route via mechanical stirring, electromagnetic stirring, ultrasonic stirring methods, chemical grain refining, spray casting [ 3 ], shearing-cooling roll [ 37 ], swirled enthalpy equilibration device process [ 38 ], gas-induced semi-solid process [ 39 ], electromagnetic stirring combined with mechanical vibration as mentioned Dao et al [ 40 ], cooling slope casting [ 41 ], low superheat casting [ 42 ] and several more and can then be thixoformed.…”