Fig. 1. Microstructure of EH36 base metal

Fig. 2. Effect of laser power on weld

Fig. 3. Effect of welding speed on weld width

Fig. 4. Effect of welding current on weld width

Fig. 5. Weld morphology under fiber-laser-MAG hybrid welding. (a) Front side; (b) back side; (c) cross section

Fig. 6. Metallographic microstructures of welds under fiber-laser-MAG hybrid welding. (a) Arc action zone; (b) laser action zone; (c) HAZ overheated zone in arc action zone; (d) HAZ overheated zone in laser action zone

Fig. 7. Hardness distribution curves of welded joint

Fig. 8. Tensile fracture specimens

Fig. 9. Transverse bending specimens. (a) Macrography of bending; (b) bending morphology of weld

Fig. 10. Fracture morphology of impact specimen of welded joint