Fig. 1. Powder morphology

Fig. 2. Melting and cladding process

Fig. 3. Sample making scheme. (a) Melting and cladding model; (b) melting and cladding path; (c) sampling layout; (d) specification of tensile specimen

Fig. 4. Cross sections of cladding layer at different powers. (a) 1500 W; (b) 1800 W; (c) 2100 W; (d) 2400 W

Fig. 5. Microstructures of upper, middle, and lower parts of cladding layer at different laser powers

Fig. 6. Morphologies before and after specimen stretching. (a) Before stretching; (b) after stretching

Fig. 7. Stress-strain relationships for five types of tensile specimens. (a) Stress-strain curve; (b) local magnification

Fig. 8. Mechanical property comparison among five tensile specimens. (a) Yield strength; (b) tensile strength; (c) Young's modulus; (d) elongation

Fig. 9. Fracture morphologies of five kinds of tensile specimens. (a) Substrate; (b) S1; (c) S2; (d) S3; (e) S4

Fig. 10. Fracture morphologies of cladding layers, heat-affected zones and substrates at different laser powers