Author Affiliations
1School of Mechanical and Electrical Engineering, Shenyang Aerospace University, Shenyang 110135, Liaoning, China2Shenyang Institute of Automation, Chinese Academy of Sciences, Shenyang 110016, Liaoning, China3Institute of Robot Intelligent Manufacturing and Innovation, Chinese Academy of Sciences, Shenyang 110169, Liaoning, Chinashow less
Fig. 1. X-ray inspection film of connector
Fig. 2. Metal laser melting deposition system
Fig. 3. Schematic of slot size and picture of substrate. (a) Slot size; (b) picture of substrate
Fig. 4. Macro appearance and X-ray inspection pictures of samples formed at different laser powers. (a) 1000 W; (b) 1500 W;
Fig. 5. Distribution width of dense porosity at different laser powers
Fig. 6. Metallographic diagrams of connection area at different laser powers. (a) 1000 W; (b) 1500 W; (c) 2000 W; (d) 2500 W; (e) 3000 W; (f) 3500 W; (g) 4000 W
Fig. 7. Microhardness at different laser powers. (a) Microhardness of fusion line; (b) microhardness outside fusion line
Fig. 8. Schematic of watermark formation
Fig. 9. Scanning electron microscopy (SEM) image of dense porosity
Fig. 10. Flow diagram of porosity after preheating base
Fig. 11. X-ray photographs and metallographic diagrams of preheated sample. (a) Preheating temperature of 50 ℃; (b) preheating temperature of 100 ℃; (c) preheating temperature of 150 ℃; (d) preheating temperature of 200 ℃; (e) preheating temperature of 50 ℃, metallographic diagram; (f) preheating temperature of 100 ℃, metallographic diagram
Fig. 12. Microhardness change of sample before and after preheating
Fig. 13. Tensile stress-strain curves
Fig. 14. SEM images of tensile sample fractures. (a) Sample before preheating; (b) sample after preheating
No. | Laser power /W |
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P1 | 1000 | P2 | 1500 | P3 | 2000 | P4 | 2500 | P5 | 3000 | P6 | 3500 | P7 | 4000 |
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Table 1. Laser power parameter table
Element | Mass fraction /% |
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Si | 9.88 | Mg | 0.44 | Fe | 0.43 | Cu | 0.011 | Zn | 0.01 | Mn | 0.0086 | Al | Balance |
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Table 2. Chemical composition of AlSi10Mg alloy powder
No. | Preheating temperature /℃ |
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T1 | 50 | T2 | 100 | T3 | 150 | T4 | 200 |
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Table 3. Preheating temperature parameter table