Changshuai Zhai, Pengfei Guo, Fei Wang, Qi Yang, Zhen Wang, Jianfeng Geng, Huijun Wang, Jun Yu, Xin Lin. Effects of Microstructure of Inconel 718 Alloy Melted by Laser Powder Bed and Its Composites on Electrolytic Grinding Surface Quality[J]. Chinese Journal of Lasers, 2025, 52(12): 1202301
- Chinese Journal of Lasers
- Vol. 52, Issue 12, 1202301 (2025)
Fig. 1. Overall diagram of ECG processing
Fig. 2. Schematic diagrams of feed modes. (a) ECM; (b) ECG
Fig. 3. Comparison of material microstructures. (a) LPBF-Inconel 718 alloy; (b) LPBF-TiB2/Inconel 718 composite; (c) element point scanning results
Fig. 4. XPS results of superpassivation films. (a) LPBF-Inconel 718 alloy; (b) LPBF-TiB2/Inconel 718 composite
Fig. 5. XPS results of LPBF-Inconel 718 alloy superpassivation films. (a) Ni; (b) Fe; (c) Cr; (d) Ti; (e) Mo; (f) Nb
Fig. 6. XPS results of LPBF-TiB2/Inconel 718 composite super passivation films. (a) Ni; (b) Fe; (c) Cr; (d) Ti; (e) Mo; (f) Nb
Fig. 7. Comparison of surface morphologies of two materials under different feed speeds. (a)‒(d) LPBF-Inconel 718 alloy; (e)‒(h) LPBF-TiB2/Inconel 718 composite
Fig. 8. Comparison of surface morphologies of two materials under different rotation speeds. (a)‒(e) LPBF-Inconel 718 alloy;
Fig. 9. Surface roughnesses of LPBF-Inconel 718 alloy and LPBF-TiB2/Inconel 718 composite after ECM and ECG machining
Fig. 10. Microstructure dissolution phenomenon after ECM. (a) LPBF-Inconel 718 alloy; (b) LPBF-TiB2/Inconel 718 composite
Fig. 11. Mechanism diagrams of ECG processing at different rotation speeds. (a) 400, 700, 1300 r/min; (b) 1000 r/min
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Table 1. Elemental compositions of Inconel 718 alloy powder
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Table 2. LPBF machining parameters
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Table 3. Effect of feed speed on machined surface in electrolytic grinding experiment
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Table 4. Effect of rotation speed on machined surface in electrolytic grinding experiment
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Table 5. Element compositions and electrochemical equivalents of LPBF-Inconel 718 alloy and LPBF-TiB2/Inconel 718 composite
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Table 6. Volumetric electrochemical equivalent parameters of two materials
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