Effect of energy arrangement on temperature field and stress field in dual-beam laser welding process with filler wire

The heat source model of double-cylinder heat source + surface heat source is established in dual-beam laser welding process. Based on the finite element software Marc, the temperature field and stress-strain field of dual-beam laser welding with filler wire are simulated when the distance between two beams is 0.6 mm. And the effect of energy arrangement on the temperature characteristics and residual stress distribution are analyzed. The simulated results show that the heat melting efficiency decreases gradually with the decrease of the angle between the beam and the weld center. The residual stress mainly concentrate on longitudinal tensile stress in weld zone. At the same time, it can be found that the energy arrangement mainly affect the residual stress distribution and the angular deformation of the weld, while the effect on the maximum residual stress is not obvious.