Fig. 1. Simulation model and boundary conditions

Fig. 2. Transient temperature field distribution diagrams of non magnetic field weldment. (a) Temperature field distribution on the surface (X-Y plane) of the molten pool; (b) temperature field distribution in the longitudinal section (X-Z plane) of the molten pool

Fig. 3. Transient temperature field distribution diagrams of 120 mT magnetic field weldment. (a) Temperature field distribution on the surface (X-Y plane) of the molten pool; (b) temperature field distribution in the longitudinal section (X-Z plane) of the molten pool

Fig. 4. Structural diagrams of the molten pool without additional magnetic field and with an additional 120 mT intensity magnetic field when the welding time node is 280 ms. (a) Width of the molten pool; (b) depth of the molten pool

Fig. 5. Schematic diagram of temperature analysis at different positions in the depth direction of Z-X section molten pool

Fig. 6. Temperature distribution curves of different position points in the molten pool of the weldment. (a) Without additional magnetic field; (b) with additional magnetic field

Fig. 7. Transient velocity vector and contour diagrams of weldment without additional magnetic field

Fig. 8. Transient velocity vector and contour diagrams of weldment with additional magnetic field

Fig. 9. Contours of transient velocity in molten pool of weldment with or without additional magnetic field. (a) Without additional magnetic field; (b) with an 120 mT intensity magnetic field

Fig. 10. Comparison of molten pool test results and simulation results of T2 red copper weldment with and without additional magnetic field. (a) Without additional magnetic field; (b) with additional magnetic field