OBRABOTKAMETALLOV MATERIAL SCIENCE Том 23 № 3 2021 EQUIPMEN . INSTRUM TS Vol. 6 No. 3 2024 a b Fig. 6. Electrode surface before machining (after 3D printing) at magnifications of ×500 (а) and ×300 (b) a b Fig. 7. Electrode surface after electrical discharge machining at minimum mode at magnification ×500 (а) and ×300 (b) a b Fig. 8. Electrode surface after electrical discharge machining at maximum mode at magnification ×500 (а) and ×300 (b) (Fig. 6) made of maraging steel MS1 by SLM method. It was found that the melted areas are located chaotically on the TE surface. Pores between the melted areas are also observed. After EDM, the surface of TE acquires a smooth and even morphology. With copy-piercing EDM in the maximum modes at I = 8 A, Ton = 100 μs, U = 100 V, hollows and chaotic cracks are formed, accompanied by zones of melted material
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