Abstract
As an emerging additive manufacturing technology, selective laser melting (SLM) can manufacture metal matrix composites with high performance. Herein, a MnSi2 compound is innovatively utilized to improve the mechanical properties of the 316L substrate. The results indicate that an appropriate mass fraction of the MnSi2 compound can promote the solid solution, leading to an increment in the surface quality, microhardness, and tensile strength of the 316L substrate. When the addition of MnSi2 is 6.0 wt%, the sample exhibits the highest microhardness and tensile strength with the value of 426 HV0.2 and 860 MPa, respectively. However, microcracks are observed and the ultimate tensile displacement is decreased synchronously; meanwhile, its fracture behavior exhibits mixed‐mode ductile fracture and brittle fracture. Overall, this study explains a novel hypothetical mechanism of solid solution reinforcement by adding a MnSi2 compound into 316L.
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