Using complex methods, we studied the influence of sample geometry and heat treatment regimens on changes in the structure and properties of AlSi10Mg alloy produced by the selective laser melting (SLM) method. It was found that the phase composition and structure of the SLM samples are independent of the sample geometry and are the same for both horizontal and vertical samples. A hierarchical structure is formed, consisting of grains measuring ∼4–8 μm and ultrafine cells an order of magnitude smaller – 0.4–0.6 μm. A characteristic feature of the SLM alloy structure is the formation of a supersaturated solid solution based on Al. Kinetic dependences of the microhardness of SLM samples before and after heat treatment under different conditions were constructed. The effect of low-temperature annealing on the aging kinetics of SLS samples was determined. The mechanical properties of SLS samples with different geometry were measured before and after heat treatment. It was shown that the strength properties of the SLM alloy are twice as high as those of the standard alloy produced using traditional technology.
Shirinkina et al. (2025) studied this question.