Fig. 1. HDR-LMD obtained GH4169 alloy block sample. (a) Physical map; (b) sample size for tensile test

Fig. 2. Macrostructure of HDR-LMDed GH4169 alloy. (a) Optical micrograph; (b) primary dendrite arm spacing

Fig. 3. Pole figures of HDR-LMDed GH4169 alloy

Fig. 4. Microstructure of central HDR-LMDed GH4169 alloy sample. (a) Laves phase; (b) δ phase; (c) γ″/γ' phase

Fig. 5. Positions for EDS analysis of as-deposited structure in HDR-LMDed GH4169 alloy

Fig. 6. Transmission image of HDR-LMDed GH4169 alloy sample. (a) Bright field image of δ phase; (b) dark field image of δ phase; (c) selected area electron diffraction pattern of δ phase

Fig. 7. Transmission image of HDR-LMDed GH4169 alloy sample. (a) TEM image of granular phase; (b) selected area electron diffraction pattern of granular phase, with green indicating γ' phase, blue indicating γ″ phase and red indicating matrix

Fig. 8. Tensile fracture morpholoy of HDR-LMDed GH4169 alloy at 25 ℃. (a) Macro-fracture; (b) cross-sectional profile of fracture; (c) longitudinal profile of fracture