Fig. 1. Schematic of laser beam deflection at welding speed of 15 mm/s

Fig. 2. Sample inspection diagram when welding speed is 5 mm/s

Fig. 3. Macroscopic forming diagrams of sample at different welding speeds. (a) 5 mm/s; (b) 15 mm/s

Fig. 4. Microstructures of heat affected zone at different welding speeds. (a) 5 mm/s; (b) 15 mm/s

Fig. 5. Microstructures of weld zone of specimen at different welding speeds. (a) 5 mm/s; (b) 15 mm/s

Fig. 6. Effect of welding speed change on hardness