Fig. 1. Schematic. (a) Laser welding; (b) welded joint

Fig. 2. Size dimension of tensile shear sample

Fig. 3. Cross-sectional morphologies of welded joints. (a) Sample 1; (b) sample 2

Fig. 4. Element distributions of DP980 side welded joints. (a) Horizontal element distribution of sample 1; (b) longitudinal element distribution of sample 1; (c) horizontal element distribution of sample 2; (d) longitudinal element distribution of sample 2

Fig. 5. Microstructures. (a) Ws of sample 1; (b) FL of sample 1; (c) WS of sample 2; (d) FL of sample 2

Fig. 6. Microstructure at welded joint interface: (a) Sample 1; (b) sample 2

Fig. 7. Longitudinal hardness distribution of welded joint

Fig. 8. Macroscopic morphology and stress-strain curve of sample after tensile shear. (a) Macroscopic morphology after fracture; (b) stress-strain curve

Fig. 9. Microscopic fracture and EDS analysis of tensile shear sample. (a) Fracture morphology of sample 1; (b) EDS analysis of sample 1; (c) fracture morphology of sample 2; (d) EDS analysis of sample 2