Fig. 1. Microstructure and XRD pattern of Ti-based amorphous alloy substrate. (a) Microstructure; (b) XRD pattern

Fig. 2. Finite element mesh model

Fig. 3. Thermal properties of Ti-based amorphous alloys. (a) Temperature-dependent thermal conductivity and specific heat capacity curves of Ti-based amorphous alloys^[19]; (b) DSC curve of Ti-based amorphous alloys

Fig. 4. Microstructure of laser re-melted sample and XRD pattern. (a) Metallographic structure of sample section; (b) schematic of micro-area XRD testing locations; (c) micro-area XRD patterns

Fig. 5. Microstructural morphologies in HAZ. (a) Schematic of different locations in HAZ; (b) microstructural morphology at TH location; (c) microstructural morphology at MH location; (d) microstructural morphology at BH location

Fig. 6. Numerical simulation results of temperature field. (a) Cross-sectional image of temperature field; (b) comparison of sample temperature field with microstructure; (c) thermal history curves at different depths within sample

Fig. 7. Cooling rate and structure transformation of amorphous alloy in molten pool region. (a) Schematic of time-temperature-structure transformation; (b) cooling rates at different depths within melt pool

Fig. 8. Free volume content and energy state variations in melt pool region. (a) Schematic of free volume content variation in melt pool region; (b) schematic of energy states in amorphous alloys ^[25]

Fig. 9. Microhardness values at different depths within re-melted sample

Fig. 10. Microhardness indentations at different depths within re-melted sample. (a) Melt pool region (depth of 0.2 mm); (b) melt pool region (depth of 0.6 mm); (c) HAZ (depth of 1.0 mm); (d) HAZ (depth of 1.1 mm); (e) HAZ (depth of 1.2 mm); (f) substrate (depth of 1.4 mm)

Fig. 11. Images of sample temperature fields at different scanning speeds

Fig. 12. SEM images of HAZ on sample at different scanning speeds

Fig. 13. Schematic of tensile specimen dimensions and stress-strain curves of re-melted samples at different scanning speeds. (a) Schematic of dimensions; (b) stress-strain curve

Fig. 14. Tensile fracture morphology images. (a) Untreated sample; (b) scanning speed of 4 mm/s (top); (c)(f) scanning speed of 4 mm/s (down); (d) scanning speed of 8 mm/s; (e) scanning speed of 12 mm/s; (f) scanning speed of 16 mm/s