Fig. 1. Schematic of laser deposition method and sampling direction of tensile specimen

Fig. 2. Process curves of single-annealing and double-annealing

Fig. 3. Dimensions of tensile sample

Fig. 4. Microstructures of as-deposited and annealing samples. (a) As-deposited OM image;(b) as-deposited SEM image; (c) A800; (d) A900; (e) DA800; (f) DA900

Fig. 5. (a) Size distributions of α phase; (b) normal distribution curves of length-width ratio of α phase

Fig. 6. Tensile properties at room temperature of specimen after annealing. (a) Tensile strength; (b) elongation; (c) percentage reduction of area after fracture

Fig. 7. Microstructures near tensile fractures. (a) A800; (b) A900; (c) DA800; (d) DA900

Fig. 8. Anisotropic distributions of mechanical properties. (a) Tensile strength; (b) elongation; (c) percentage reduction of area after fracture

Fig. 9. Microstructures at columnar grain boundary. (a) A800; (b) A900; (c) DA800; (d) DA900

Fig. 10. Microhardness under different annealing methods