Hailong Shao, Zixiong Lin, Zheng Zhang, Yichao Wang, Ming Shi, Wenxiong Lin. Selective Laser Melting Process of Titanium Alloy Based on Single-Track Structure and Linear and Volumetric Energy Densities[J]. Laser & Optoelectronics Progress, 2022, 59(1): 0114007
- Laser & Optoelectronics Progress
- Vol. 59, Issue 1, 0114007 (2022)
Fig. 1. Micromorphology of TC4 titanium alloy powder
Fig. 2. Morphologies of single channel with different linear energy densities when layer thickness is 30 μm. (a) η<115 J/m; (b) 115 J/m≤η≤190 J/m; (c) η>190 J/m
Fig. 3. Relationship between molten pool width and laser power when layer thickness is 30 μm
Fig. 4. Relationship between width and height of molten pool and linear energy density. (a) Relationship between width and linear energy density; (b) height of molten pool when η<115 J/m; (c) height of molten pool when 115 J/m≤η≤190 J/m; (d) height of molten pool when η>190 J/m
Fig. 5. Typical surface morphologies of different samples. (a) No. 1; (b) No. 7; (c) No. 13; (d) No. 25
Fig. 6. SEM images of different samples. (a) No. 1; (b) No. 7; (c) No. 13; (d) No. 25
Fig. 7. Microstructure and XRD image of No. 7 sample. (a) Microstructure; (b) XRD image
Fig. 8. Schematic of powder bed melting process
Fig. 9. Curve of forming thickness changed with number of powder spreading
Fig. 10. Relationship among linear energy density, surface roughness, and density
Fig. 11. Relationship among volumetric energy density,surface roughness, and density
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Table 1. Parameters of three-factor-five-level orthogonal experiment (Initial powder thickness: 30 μm)
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Table 2. Surface roughness and density of samples
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