Fig. 1. AlSi10Mg sample forming by laser powder bed fusion (LPBF). (a) SEM image of AlSi10Mg powder; (b) schematic of LPBF forming; (c) schematics of forming specimen vertical and parallel to powder spreading direction, respectively; (d) AlSi10Mg block samples processed by LPBF

Fig. 2. Vertical sample for axial load fatigue testing. (a)(b) Unmachined samples; (c) standard fatigue sample

Fig. 3. OM images of microstructures of samples formed along different directions under the technological parameters of P＝450 W and v＝2000 mm/s. (a)(b) OM images of cross-section of vertical sample and its magnified view; (c)(d) OM images of cross-section of horizontal sample and its magnified view

Fig. 4. Compression properties of samples formed along different directions. (a) Yield strength σ_0.2 and compressive strength σ_bc;(b) schematic of compression crack propagation

Fig. 5. High-temperature tensile properties of samples formed along different directions. (a) Vertical samples; (b) horizontal samples

Fig. 6. Columnar diagram of mechanical properties of samples formed along different directions at different temperatures. (a) 100 ℃；(b) 125 ℃；(c) 150 ℃；(d) 175 ℃

Fig. 7. Fatigue curve of vertical sample. (a) S-N curve of smooth sample (R＝0.1 and N_f＝10⁷ cycle); (b) calculation of median fatigue strength by lifting method

Fig. 8. Fatigue crack growth test of vertical sample. (a) Relationship curve between crack length a and fatigue cycle N；(b) relationship curve of fatigue crack growth rate da/dN with stress intensity factor ΔK