The temperature field and material flow behavior of the welding process were investigated by the combination of experiment and numerical simulation The influence of resistance assisted heating on the

The temperature field during the welding process was affected by the welding current, welding speed, and resistance assisted heating. The maximum temperature was found at the center of the weld pool.
The material flow behavior during the welding process was influenced by the welding speed and resistance assisted heating, and the formation of the joint was affected by the deformation of the base metal and the weld pool.
Resistance assisted heating could improve the formability of the joint, and the optimal temperature range was 100-150 °C.
When the auxiliary heating temperature exceeded 100 °C, the tunnel defects in the joint could be eliminated due to the thermal expansion of the material, which could reduce the residual stress and improve the mechanical properties of the joint.
The numerical simulation results were consistent with the experimental results, which indicated that the simulation method could effectively predict the temperature field and material flow behavior of the welding process.
The research results provide a theoretical basis for the optimization of the welding process and the improvement of the joint quality.