Title: Microstructural evolution of semisolid 2A50 alloy prepared by electromagnetic stirring
Abstract: The effects of stirring current and stirring frequency on the microstructural evolution of semisolid 2A50 alloy prepared by electromagnetic stirring(EMS) were analyzed, and microstructure evolution of semisolid 2A50 alloy prepared by different technological parameters after partial remelting were investigated. The results show that with increasing the stirring current and frequency, the microstructures of semisolid 2A50 alloy evolve from coarse dendrites to fine and quasi-globular solid particles. Moreover, after partial remelting, these microstructures become more spherical with increasing the stirring current and stirring frequency. As the stirring parameters are 30 A and 30 Hz, the average particle size is about 80 μm and the shape factor is about 0.76. Further increasing the stirring current and frequency makes no obvious improvements of microstructure. Besides, average particle size constantly increases with prolonging the holding time because that Ostwald ripening can improve the degree of spheroidization. The current coarsening rate constant of semisolid 2A50 alloy is 547 μm3·s–1 at 590 ℃.
Publication Year: 2015
Publication Date: 2015-01-01
Language: en
Type: article
Access and Citation
AI Researcher Chatbot
Get quick answers to your questions about the article from our AI researcher chatbot