Fig. 1. Gaussian heat source model

Fig. 2. Finite-element model

Fig. 3. Cloud map of temperature distribution of selective laser melting of aluminum alloy

Fig. 4. Temperature field distributions at the midpoint of the scan line. (a) Thermal cycle curve; (b) temperature gradient curve

Fig. 5. Molten pool at the midpoint of the scan line. (a) Molten pool surface; (b) cross section of molten pool

Fig. 6. Molten pool surface at different scanning speeds. (a) 100 mm/s; (b) 500 mm/s

Fig. 7. Temperature evolution under different process parameters. (a) Different scanning speeds; (b) different laser powers

Fig. 8. Length, width, and depth of the molten pool under the different parameters. (a) Different scanning speeds; (b) different laser powers

Fig. 9. Block print test piece

Fig. 10. Cross section of molten pool at scaning speed of 100 mm/s

Fig. 11. Melt width comparison at different scanning speeds