Shasha Zhang, Baopeng Zhang, Wenqi Zhang, Huanqing Yang, Wei Zheng, Yun Wang, Dongjian Peng, Haihong Zhu. Densification Behavior and Microstructure of High Strength and High Conductivity Copper Alloy Fabricated by Selective Laser Melting[J]. Chinese Journal of Lasers, 2022, 49(16): 1602005
- Chinese Journal of Lasers
- Vol. 49, Issue 16, 1602005 (2022)
Fig. 1. QCr0.8 powder used in experiment. (a) Morphology; (b) particle-size distribution
Fig. 2. Density of SLM QCr0.8 versus scanning speed under different hatching spaces
Fig. 3. OM images of SLM QCr0.8 samples under different scanning speeds at hatching space of 0.20 mm. (a) 200 mm/s; (b) 400 mm/s; (c) 600 mm/s; (d) 800 mm/s; (e) 1000 mm/s; (f) 1200 mm/s
Fig. 4. Influence of hatching space on relative density under different scanning speeds
Fig. 5. Schematics of pore formation under different hatching spaces. (a) Appropriate hatching space; (b) small hatching space；(c) large hatching space
Fig. 6. XRD patterns of QCr0.8 alloy in different states. (a) Whole map; (b) local map
Fig. 7. Typical microstructures of SLM QCr0.8 sample. (a) XOZ plane; (b) XOY plane
Fig. 8. Microstructure of annealed QCr0.8 alloy after forging. (a) Under low magnification optical microscope; (b) under high magnification optical microscope
Fig. 9. SEM images of SLM QCr0.8 alloy sample. (a)(b) XOY plane; (c)(d) XOZ plane
Fig. 10. FTEM images of SLM QCr0.8 alloy. (a) Bright-field image under low magnification; (b) bright-field image under high magnification; (c) HRTEM image; (d) FFT image
Fig. 11. Stress-strain curves of SLM QCr0.8 alloy sample in horizontal direction and aged sample
Fig. 12. Fracture morphologies of SLM QCr0.8 alloy tensile sample. (a) As-deposited, low magnification; (b) as-deposited, high magnification; (c) aged, low magnification; (d) aged, high magnification
Fig. 13. SLM QCr0.8 part with complex inner channels
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Table 1. Process parameters of SLM QCr0.8 alloy
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Table 2. Comparison of tensile property and conductivity between SLM QCr0.8 alloy and annealed QCr0.8 alloy after forging
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