摘要：SummaryZero- to two-dimensional nanomaterials have been incorporated into metal-matrices to improve the strength of metals, but challengingly, high-volume-fraction nanomaterials are difficult to disperse uniformly in metal matrices, severely degrading the ductility of conventionally processed metals. Here, a considerably dense uniform dispersion ofin situformed nanoscale lamellar TiC reinforcement (16.1 wt %) in Ti matrix is achieved through laser-tailored 3D printing and complete reaction of Ti powder with a small amount (1.0 wt %) of carbon nanotubes (CNTs). An enhanced tensile strength of 912 MPa and an outstanding fracture elongation of 16% are simultaneously achieved for laser-printed components, showing a maximum 350% improvement in “product of strength and elongation” compared with conventional Ti.In situnanoscale TiC reinforcement favors the formation of ultrafine equiaxed Ti grains and metallurgically coherent interface with minimal lattice misfit between TiC lamellae and Ti matrix. Our approach hopefully provides a feasible way to broaden structural applications of CNTs in load-bearing Ti-based engineering components via laser-tailored reorganization with Ti.Graphical AbstractDisplay OmittedHighlights•Take advantage of reaction between CNTs and Ti for performance breakthrough•Use laser 3DP as a unique route to tailorin situformation of novel nanostructure•Increase strength and ductility simultaneously via multiple strengthening mechanisms•Broaden structural applications of CNTs in load-bearing Ti-based engineering materialsMaterials Processing; Mechanical Property; Nanomaterials
