Fig. 1. Principles of two laser claddings. (a) EHLA; (b) CLA

Fig. 2. Macroscopic morphologies of single-layer stainless steel coating prepared by two methods. (a) EHLA; (b) CLA

Fig. 3. Molten pool morphologies of EHLA and CLA. (a) EHLA; (b) CLA

Fig. 4. Morphologies of single-layer multi-lap coatings by EHLA. (a) Macroscopic morphology of coating; (b) micro-morphology of surface of coating (zone A); (c) micro-morphology of middle part of coating (zone B); (d) micro-morphology of coating/substrate interface (zone C)

Fig. 5. Morphologies of single-layer multi-lap coatings by CLA. (a) Macroscopic morphology of coating; (b) micro-morphology of surface of coating (zone A); (c) micro-morphology of middle part of coating (zone B); (d) micro-morphology of coating/substrate interface (zone C)

Fig. 6. Comparison of microstructures of coatings prepared by EHLA and CLA. (a) Top microstructure of coating prepared by EHLA; (b) cross-sectional microstructure of coating prepared by EHLA; (c) top microstructure of coating prepared by CLA; (d) cross-sectional microstructure of coating prepared by CLA

Fig. 7. Elemental distributions of coatings. (a) Coating prepared by EHLA; (b) coating prepared by CLA

Fig. 8. Hardness distribution of coating

Fig. 9. XRD analyses for surfaces of coatings prepared by EHLA and CLA

Fig. 10. Polarization curves of substrate and coatings prepared by EHLA and CLA in 3.5% NaCl solution

Fig. 11. Microstructures of dendrites in coatings. (a) Coating prepared by EHLA; (b) coating prepared by CLA

Table 1. Chemical composition of 27SiMn steel and 431 stainless steel powder (atomic number fraction, %)

Table 2. Corrosion potentials and current densities of substrate and coatings prepared by EHLA and CLA

Table 3. Difference in chemical composition inside and between dendrites for coatings prepared by EHLA and CLA