Fig. 1. Schematic of scanning strategy of SLM forming

Fig. 2. Dimension diagrams of specimen.（a）Tensile specimen；（b）fatigue crack growth specimen

Fig. 3. Relative density of GH3536 alloy in different states

Fig. 4. Microstructures of as-deposited GH3536 alloy. (a) X‒Y plane; (b) (c) X‒Z plane; (d) amplified view of area 1

Fig. 5. Microstructures of SLM GH3536 alloy after post treatment. (a) X‒Y plane of HIP state; (b) X‒Z plane of HIP state; (c) X‒Y plane of HIP+ST state; (d) X‒Z plane of HIP+ST state

Fig. 6. BSE images and EDS analysis results of SLM GH3536 alloy in different treatment states.（a）Precipitation image of HIP state；（b）precipitation image of HIP+ST state；（c）EDS analysis result of spot 1；（d）EDS analysis result of spot 2；（e）EDS analysis result of spot 3

Fig. 7. Mechanical properties of SLM GH3536 in different states.（a）Tensile property at room temperature；（b）Vickers hardness

Fig. 8. Fatigue crack growth test results of SLM GH3536 in different states.（a）Crack length versus number of cycles；（b）fatigue crack growth rate curve

Fig. 9. Fatigue crack growth fractography of SLM GH3536 in different states.（a）Paris region of as-deposited alloy；（b）amplified view of area 1；（c）final rupture region of as-deposited alloy；（d）Paris region of HIP+ST alloy；（e）amplified view of area 2；（f）final rupture region of HIP+ST alloy