The mechanism study of high-speed machining of Ti alloy assisted by low-temperature magnetic field coupling

Ti alloy are primary materials used in the aerospace field, yet the outcomes of their high-speed machining are still not entirely satisfactory. This study introduces low temperature and magnetic fields into the high-speed machining of titanium alloys to address current challenges. The study investigated the effects of introducing low temperature and magnetic fields on the cutting performance, tool wear, and the changes in the workpiece material from macroscopic morphology to microstructural characteristics during high-speed machining of titanium alloys. The results indicate that the low-temperature magnetic field technology effectively combines the advantages of low temperature and magnetic fields, enhancing the material's machinability. This approach achieves surface roughness of 0.075 μm and extends tool life to 125 min. The cutting force and cutting temperature are reduced by 18.6 % and 83.9 % respectively. The cryogenic-magnetic field coupling effect addresses the issue of tool stress concentration and reduces tool edge chipping. Overall, compared with standalone cryogenic or dry cutting processes, the cryogenic-magnetic field technology demonstrates improved surface quality, smoothed chip morphology, and reduced metamorphic layer on workpiece surfaces.