Abstract
Fine gas-atomized powders were prepared for fabricating 316L stainless steel by selective laser melting (SLM) for medical implant applications. The effect of 3D printing laser power on the microstructure, biocompatibility, mechanical and corrosion properties of SLM 316L were systematically investigated and compared with the traditionally quenched. The SLM 316L showed irregular grains with many sub-grains and a thicker passive film with lower Mo content than the quenched 316L. SLM 316L formed at high laser power showed improved elongation, corrosion resistance, and biocompatibility, while that prepared at low power showed poorer performance and was unstable during long-term experiments in simulated body fluid.
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