Effect of Low-Frequency Electromagnetic Vibration on Cast-ability, Microstructure and Segregation of Large-Scale DC Ingots of a High-Alloyed Al

Abstract

Low-Frequency Electromagnetic Vibrating Casting (LFEVC) was developed to cast large-scale highly alloyed Al-Zn-Mg-Cu-Zr ingots for super-high strength and toughness. Compared with conventional Direct Chilling Casting (DC), LFEVC can significantly improve surface quality, decrease hot-tearing tendency, generate finer, more uniform and equiaxed microstructures, and greatly suppress macro segregation and grain boundary segregation with increasing alternate and direct current ampere turns. In the range of alternate and direct current ampere turns employed in the experiments, the optimum condition is that the alternate current ampere turns is 9,000 At and the direct current ampere turns is 14,300 At.

Microstructure and Mechanical Properties of Castings under Vibration Techniques - A Review

“…The different materials such as AZ31, AZ80magnesium alloy, A356 aluminium alloy are maintain with different range of temperature and poured into the mould cavity [9,11], [13]…”

“…Low-Frequency Electromagnetic vibrating high alloyed vibrating aluminium alloy casting develops finer, more uniform and equated microstructures, and highly suppresses macro segregation and grain boundary segregation with increasing alternate and direct current amperes Applied Mechanics and Materials Vol. 550 [13]. Apply with electromagnetic vibrations in the material of A356 aluminium alloy present the advantage of acting uniformly and practically at will without material contact with the melt consequently, without risk of contamination [14].…”

Refinement of Microstructure of JIS A7204 and A6022 Aluminum Alloys Solidified by Electromagnetic Vibration Technique

“…From then on, researchers have improved and modified the technique to apply to various metals 19,20) and alloys. 2123) Cui and co-workers 24) employed the technique to solidify metallic billets at low vibration frequencies. Zhong et al 25) combined the technique with semi-continuous casting to solidify AlSn alloys with a refined structure.…”