Fig. 1 a Schematic illustration, b photograph of the specimen used for tensile tests

Fig. 2 a Porosity of the SLMed samples as a function of laser scanning speed (inset: OM micrographs corresponding to different scanning speeds), and SEM upper surface images of the SLMed samples fabricated at the scanning speeds of b 700 mm/s, c 1100 mm/s, respectively

Fig. 3 a SEM image, b EBSD image and inverse pole figures, c grain size distribution, d EDS analysis of the SLMed Al-Mn-Mg-Sc-Zr sample fabricated at the laser scanning speed of 900 mm/s

Fig. 4 XRD patterns of the as-fabricated and aged alloys

Fig. 5 TEM bright-field images and corresponding selected area electron diffraction (SAED) patterns (inset) for a, b as-fabricated and c aged alloys (300 °C for 6 h), d high-resolution TEM and corresponding inverse fast Fourier transforms (IFFT) pattern (inset) for the alloy after aging at 300 °C for 6 h

Fig. 6 Evolution of the Vickers hardness of the SLMed Al-Mn-Mg-Sc-Zr samples with the increases of a scanning speed, b aging time at 300 °C

Fig. 7 a True compressive stress-strain curves for the samples in the direction perpendicular to the building direction, b compression yield strength, c true ultimate strength as a function of aging time at 300 °C for the samples built in different directions

Fig. 8 a Tensile stress-strain curves (parallel to the building direction) and b tensile properties of as-fabricated and aged samples (300 °C for 6 h), and comparison of the c YS, d UTS of the present SLMed Al-Mn-Mg-Sc-Zr alloy to other known typical SLMed and wrought 7075 aluminum alloys