Fig. 1. SEM image of AlSi10Mg powder

Fig. 2. (a) Schematic drawing of SLM technology based on powder bed; (b) SLM equipment of EOS M290

Fig. 3. (a) AlSi10Mg cubic sample formed by SLM; (b) size of tensile sample; (c) AlSi10Mg tensile samples formed by SLM

Fig. 4. (a) Three-dimensional microstructure image of AlSi10Mg cubical sample formed by SLM, the red dashed lines show the scanning strategy; (b)-(c) enlarged morphology of A, B, C surfaces, the red dashed lines show the boundary of melt pool

Fig. 5. Phase diagram of aluminum-silicon (the red dashed line shows the solidification path and phase transformation of Al-10Si)[20]

Fig. 6. Schematic drawing of solid-liquid interface of SLM formed AlSi10Mg alloy melt pool

Fig. 7. Cellular and dendrite zones in SLM formed AlSi10Mg melt pool

Fig. 8. SEM morphology of A plane of cubical AlSi10Mg sample formed by SLM (the white dashed line shows the boundary of melt pool and the white arrows present the growth direction of dendrites)

Fig. 9. SEM morphology of C plane of cubical AlSi10Mg sample formed by SLM

Fig. 10. Schematic of morphological evolution of Al-Si eutectic structure in different zones of melt pool in SLM formed AlSi10Mg

Fig. 11. Room temperature tensile properties of SLM formed AlSi10Mg alloy in transverse and longitudinal directions. (a) Strength; (b) elongation

Fig. 12. SEM tensile fractures of SLM formed AlSi10Mg alloy at room temperature. (a)-(c) Longitudinal sample; (d)-(f) transverse sample

Fig. 13. Crack formation of SLM formed AlSi10Mg alloy in tensile process at room temperature