Fig. 1. ASHM machine

Fig. 2. SEM and particle size distribution of GH3536 powder

Fig. 3. Regular relationship between laser volume energy density and relative density of GH3536 [insets (a)(b)(c) show the blowhole defects, free of all defects and spheroidization defects]

Fig. 4. Additive surface morphologies of GH3536 sample formed by SLM. (a)(b) SEM images of the original additive surface; (c) original additive surface morphology by white light interferometer

Fig. 5. Microstructure of additive GH3536 sample formed by SLM. (a) Optical microscopic image after polishing; (b)‒(f) SEM and EBSD images of the microstructure after corrosion

Fig. 6. Sample preparation model and tool selection scheme for GH3536 by ASHM. (a) Sample model; (b) cutting tool types

Fig. 7. Schematic diagrams of milling with different types of tools and roughness of the processed sample surface. (a) Ball end milling tool, (b) round nose milling tool; (c) flat end milling tool; (d) roughness of the surface processed by ball end milling tool; (e) roughness of the surface processed by round nose milling tool; (f) broken fracture of flat end milling tool

Table 1. Chemical composition of GH3536 superalloy powder

Table 2. SLM forming process parameters of GH3536 superalloy

Table 3. Milling process parameters of GH3536