Fig. 1. Schematic of SLS^[28]

Fig. 2. Schematic of SLM

Fig. 3. Schematic diagram of LMD^[35]

Fig. 4. Phase diagram of Al-Si alloy^[39]

Fig. 5. Effect of Si content on mechanical properties of Al-Si binary alloy SLM components^[52]. (a) Tensile strength and proof stress of Al-Si SLM samples fabricated using the optimal laser scanning parameters; (b) breaking elongation of Al-Si SLM samples fabricated using the optimal laser scanning parameters

Fig. 6. Top view of single track of selective laser melted AlSi10Mg and process window^[54]

Fig. 7. Cross-sectional view of single track of selective laser melted AlSi10Mg and process window^[54]

Fig. 8. Tensile stress-strain curves and microhardness^[64]. (a) Tensile stress-strain curves of as-fabricated and heat-treated samples; (b) microhardness of as-fabricated, heat-treated, and LSR-processed samples

Fig. 9. Mechanical properties of TiN/AlSi10Mg composites with different TiN contents^[73]. (a) Microhardness;(b) yield and tensile strength as well as ductility

Fig. 10. Stress-strain curves and tensile strength of SLM CNT-AlSi10Mg samples with different contents of CNT^[78].(a) Stress-strain curves ; (b) tensile strength

Fig. 11. Lightweight metal mirror manufactured by Fraunhofer Institute in Germany using SLM technology^[92].(a) Hollow structure inside the mirror; (b) physical diagram of the mirror

Fig. 12. Light weighted SLM mirrors^[93-94].(a) Physical diagram of SLM mirror; (b) internal structure of SLM mirror;(c) physical diagram of SLM mirror; (d) structure diagram of SLM mirror

Fig. 13. Aluminum alloy aviation grade structural support printed with SLM^[95]

Fig. 14. Aluminum alloy antenna bracket printed with SLM by Thales Alenia Space^[8]. (a) Aluminum alloy antenna bracket; (b) the bracket is mounted on the satellite component

Fig. 15. AL250C aircraft engine components printed with SLM^[97]