同步辐射成像技术在金属材料凝固研究中的应用进展（特邀）

The metal solidification process directly determines the microstructure and properties of materials.However, the opaque nature of metallic materials and the high -temperature environment of melt have long constrained real -time observation and in -depth research on this process.The emergence of synchrotron radiation imaging technique has provided an innovative research method to address this challenge.Here, we systematically review the research progress of this technique in the field of metallic material solidification, highlighting its typical applications on nucleation behavior, dendrites, eutectics, intermetallic compounds, liquid phase separation behavior, defect formation mechanisms, and microstructural evolution under external fields.Furthermore, we also prospect the future development trends in the in situ characterization of metal solidification.