Research Progress of Microsegregation Behavior During Alloy Solidification under Steady Magnetic Field

Author of the article:HE Shengya1 , LI Chuanjun2 , LIU Xiang3 , REN Zhongming3

Key Words：magnetic field; microsegregation; alloy solidification; undercooling; diffusion; dendritic coarsening

Abstract：The magnetic field affects the formation of microsegregation by changing factors such as undercooling, solid-state diffusion, dendrite coarsening, melt convection and dendrite growth during alloy solidification, which leads to changing the mechanical properties of castings. In this paper, the research progress of microsegregation under magnetic field is reviewed, and the modifications of the main factors affecting the formation of microsegregation under the action of magnetic field is analyzed. The changes in nucleation, dendritic growth and solute distribution under the magnetic field are summarized. Formation mechanism of microsegregation during solidification under the magnetic field is discussed. On the basis of the classical microsegregation model, a microsegregation model under magnetic field is constructed to predict the variation trend of microsegregation under magnetic field, which lays a theoretical foundation for the application of magnetic field to control solute segregation.