Research Progress on Interfacial Stability of Directionally Solidified Metal Materials in High Magnetic Field

Author of the article:YUAN Yanding1,2, DONG Shulin1 , LIU Tie1 , YUAN Yi2 , WANG Kai1 , WANG Qiang1

Author's Workplace：1. Key Laboratory of Electromagnetic Processing of Materials (Ministry of Education), Northeastern University, Shenyang 110819, China; 2. School of Metallurgy, Northeastern University, Shenyang 110819, China

Key Words：directional solidification; high magnetic field; solid-liquid interface stability; metal

Abstract：Directional solidification in high magnetic field is a new solidification method, which has unique advantages in the processing and modification of materials. Lorentz force, thermoelectric magnetic force and magnetization force can affect the melt flow, change the solute distribution at the interface, and cause constitutional supercooling, thus affecting the interface stability. The interfacial stability can be affected by changing the interfacial energy through the thermoelectric magnetic force and magnetic dipole interaction. In this paper, the current research status of interfacial stability of directionally solidified metal materials in high magnetic field is reviewed, mainly dealing with the stability of solid-liquid interface. The effects of magnetic field on the solute gradient and interface energy at the interface front are emphatically introduced, and the magnetic field mechanisms such as Lorentz force, magnetization force and magnetic dipole interaction are summarized. At present, two main problems are pointed out: quantitative experiment and coupling of multiple effects, and the prospect of future research is put forward.