Abstract
In this letter, SiC/AlSi10Mg composites have been fabricated under different selective laser melting (SLM) processing parameters, and then heat-treated for the microstructure and property tailoring. The resulted effects on densification responses, phase constituents, microstructure evolution and mechanical properties of the SiC/AlSi10Mg composites are analyzed and discussed in detail. The results showed that the highest densification and tensile strength were achieved due to the precipitation hardening of Si and Mg2Si, dispersion strengthening of SiC and solid-solution strengthening of α-Al. After kept at 300 °C for 2 h, the ductility of the sample improved significantly with certain sacrifice of tensile strength due to the precipitation of β-Al4.5FeSi, coarsening of Si particles and weakened solid-solution effects from supersaturated α-Al.
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