This work proposes a T6-like heat treatment, including solid-solution treatment at 535 °C and an artificial aging treatment for 10 h at 158 °C, to control the mechanical behavior of selective-laser- melting (SLM)-produced AlSi10Mg alloys. The mechanical properties of the AlSi10Mg alloys, such as densification, hardness, and tensile/bending strength, were investigated, and the microstructure of the alloys was analyzed. The results reveal that the tensile strength of the heat-treated samples slightly decreased by 19.97% (from 334 MPa to 267.3 MPa of the as-fabricated samples), while the elongation showed a remarkable increase by up to 155% (from 3.64% to 9.28%). Likewise, the bending strength slightly decreased by 6.1%, while the fracture deflection dramatically increased by up to 122.9% after T6 heat treatment. Thus, the T6 heat treatment can critically enhance plasticity/ductility without any significant loss in the tensile/bending strength of the alloy. The corresponding mechanism is also elucidated based on the spheroidization and diffusion of silicon precipitation during the T6 heat treatment. The results of this study offer an intriguing insight to tailor the mechanical properties of SLM-fabricated AlSi10Mg alloys using suitable solid solutions and artificial aging treatment.

这项工作提出了一种类似于T6的热处理，包括在535°C的固溶处理和在158°C的人工时效处理10 h，以控制选择性激光熔融（SLM）生产的AlSi10Mg合金的机械性能。 。研究了AlSi10Mg合金的机械性能，例如致密性，硬度和拉伸/弯曲强度，并分析了合金的微观结构。结果表明，热处理后的样品的拉伸强度略有下降，下降了19.97％（从加工后的样品的334 MPa下降到267.3 MPa），而伸长率却显着提高了155％（从3.64％下降到3.75％）。 9.28％）。同样，在T6热处理后，抗弯强度略微降低了6.1％，而断裂挠度却急剧增加了高达122.9％。因此，T6热处理可以在不显着降低合金的拉伸/弯曲强度的情况下，显着提高其塑性/延展性。还根据T6热处理过程中硅沉淀物的球化和扩散阐明了相应的机理。这项研究的结果为使用合适的固溶体和人工时效处理来定制SLM制造的AlSi10Mg合金的机械性能提供了有趣的见解。