Hu Yong, Yang Xiaokang, Kang Wenjiang, Ding Yutian, Xu Jiayu, Zhang Huiying. Effects of Combination of Powders with Different Particle Sizes on Surface Roughness and Internal Defects of IN738 Alloy Formed by Selective Laser Melting[J]. Laser & Optoelectronics Progress, 2021, 58(1): 114003
- Laser & Optoelectronics Progress
- Vol. 58, Issue 1, 114003 (2021)
Fig. 1. Schematic of S-type orthogonal scanning strategy
Fig. 2. Morphology and particle size distribution of IN738 alloy powder with different particle sizes. (a)?(c) Particle morphology of 1 # powder, 2 # powder, and 3 # powder; (d)?(f) particle size distribution of 1 # powder, 2 # powder, and 3 # powder
Fig. 3. Surface roughness and density of SLM formed parts
Fig. 4. Surface morphology of 2 # powder SLM forming parts. (a) XOY plane; (b) XOZ plane
Fig. 5. Porosity and crack density of SLM shaped parts prepared with powders of different particle sizes
Fig. 6. Schematic of powder spreading with different particle sizes. (a) Powder particle size ratio is uniform; (b) single powder size
Fig. 7. 2 # powder SLM formed parts XOY and XOZ plane IPF grain structure diagram and microstructure. (a) XOY plane IPF; (b) XOZ plane IPF; (c) XOY plane microtopography; (d) XOZ plane microtopography
Fig. 8. Schematic of molten pool organization model on XOY plane and XOZ plane. (a) Single molten pool model; (b) (c) top view of Fig. (a); (d) schematic of cutting position; (e) molten pool on XOY plane; (f) molten pool on XOZ plane
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Table 1. IN738 alloy powder element content (mass fraction, %)
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Table 2. IN738 alloy powder particle size distribution characteristics and physical properties
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