Fig. 1. TiB₂/7050 composite powder morphology, print sample blocks, and tensile sample size. (a) Powder morphology; (b) different print sample blocks; (c) LPBF shaped sample block with size of 60 mm×20 mm×10 mm; (d) schematic of tensile specimen size

Fig. 2. Relative density values of samples measured under different scanning spacings. (a) Scanning spacing of 75 μm; (b) scanning spacing of 90 μm

Fig. 3. Metallographic structures of TiB₂/7050 sections under different process parameters. (a) No.1; (b) No.2; (c) No.3; (d) No.4

Fig. 4. Mechanical properties of as-built and heat-treated TiB₂/7050_{composites formed by LPBF. (a) Tensile strength; (b) yield strength; (c) elongation}

Fig. 5. XRD patterns of as-built and heat-treated TiB₂/7050 composites

Fig. 6. SEM images and EDS results of as-built and heat-treated TiB₂/7050 composites. SEM images of (a)(b) as-built and (c)‒(e) heat-treated TiB₂/7050 composites; EDS results of (f) Al, (g) Zn, (h) Ti, (i) Cu, and (j) Mg in as-built and heat-treated TiB₂/7050 composites

Fig. 7. EBSD image, grain size distribution, and pole and inverse pole images of heat-treated TiB₂/7050 composites formed by LPBF. (a) EBSD image; (b) grain size distribution; (c) pole image; (d) inverse pole image

Fig. 8. Tensile fracture morphologies of as-built and heat-treated TiB₂/7050 composites. (a)(b) As-built state; (c)(d) heat-treated state; (e) enlarged result at dotted box in Fig. 8 (b); (f) enlarged result at dotted box in Fig. 8 (d)