Fig. 1. SEM image of AlSi10Mg powder

Fig. 2. Schematic of LDMD process of single-track sample LDMD

Fig. 3. LDMD equipment and experimental process. (a) LDMD equipment; (b) LDMD experimental process

Fig. 4. Embed point of thermal couple on substrate

Fig. 5. Sampling directions and size of tensile samples. (a) Sampling direction; (b) size

Fig. 6. Temperature curves of substrate with cooling. (a) Overall temperature curve of substrate; (b) interval temperature curve; (c) temperature rise curve during scanning; (d) temperature curve at single temperature measuring point

Fig. 7. Temperature curves of substrate without cooling. (a) Overall temperature curve of substrate; (b) interval temperature curve; (c) temperature rise curve during scanning; (d) temperature curve at single temperature measuring point

Fig. 8. Macrostructure morphology of deposited AlSi10Mg alloy. (a) Different cooling parameters; (b) test locations for related geometric features

Fig. 9. Geometric feature sizes of single-track deposition specimens. (a) Deposition height; (b) top layer width; (c) top layer thickness and ratio of top layer

Fig. 10. Microstructure of 5th deposited layer with cooling. (a) Overall region; (b) top region; (c) middle region; (d) bottom region (e) inter-dendritic zone; (f) dendritic zone

Fig. 11. Microstructure of 5th deposited layer without cooling. (a) Bottom region; (b) overall region; (c) top region

Fig. 12. Results of tensile test

Fig. 13. Dimples of tensile fracture. (a) With cooling; (b) without cooling

Fig. 14. SEM pictures of fracture. (a) Sample 2-1~5; (b) sample 1-1~5; (c) pore defect

Fig. 15. Morphology of formed specimens. (a) Without cooling; (b) with cooling